Here are O-C diagrams for a selection of Mira stars. The diagrams shows the cycle number (E) on the x-axis and O-C in days on the y-axis. The red dots are maxima that are fitted from observations, the lightblue are maxima published by AAVSO and the darkblue are maxima collected from various other published sources. The fitted maxima are based on observation data from AAVSO, AFOEV, VSOLJ, BAA/VSS, ASAS-SN and DASCH and calculated by using a mean lightcurve for each star. The mean lightcurves used can be found here. For a maxima to be recognized it had to fulfil these criteria:
- At least 12 observations around the maximum.
- At least 5 observations before and 5 observations after the peak observation.
- At least an amplitude of 1.5 magnitudes between the peak observation and the observations before and after.
- Only observations in a span of 80% of the variable's period around the peak observation is used.
When a maximum fulfilling the criteria was found the mean lightcurve was fitted to the observations and the time and magnitude was noted. A preliminary O-C was then calculated by using the elements from GCVS4. In some cases a manual correction of the O-C was needed if the O-C is out of phase with more than a half cycle. From these O-C values an adjusted mean period and epoch was derived and new O-C values were calculated and plotted in the diagrams below.
The AAVSO maxima have been adjusted with a fixed offset for each star to get the datasets in line with each other.

By clicking on the graph a table with the underlying data is presented.

Under each graph are some data about the star and the diagram.
The 1st row shows the new mean period and epoch. LC is a link to the mean lightcurve for the star. Avg is a link to a smoothened O-C diagram constructed by using a moving average of 7 points around each point in the original diagram. Per is a link to a diagram that shows the star's period over time.
The 2nd row shows the result of an linear fit to the GCVS4 O-C values. ΔP is the slope in days/cycle. The GCVS4 period is added by this amount to get the new mean period. The ± is the standard error for the coefficient. t: is the t-statistics (ΔP / standard error) and suggest the significance of the linear fit, r²: shows the coefficient of determination for the fit. ΔEpoch is the interception point with the y-axis. The GCVS4 epoch is adjusted by this amount to get the new mean epoch.
The 3rd row shows the same thing but for a parabolic fit. A parabolic O-C diagram suggest that the period is changing in a steady pace and ΔP/C shows the amount in days per cycle that best fit the diagram. Care should be taken not to overestimate this information as most O-C diagram shows a lot of random scatter in the period that can create false relations. Stars with a high value of t: and a r²: near 1 could be candidates for Miras with a continuous changing period.
The colour for ΔP and ΔP/C is red for t: <5 and green for t: >= 5 to easier see where there is a high statistically significance. ΔP and ΔP/C is also clickable. ΔP shows a diagram with the original GCVS4 elements and ΔP/C shows the residuals when the parabolic part of the curve is removed.
The 4th row shows the mean magnitude at max ± standard deviation. The extreme values are showed within parentheses.
The 5th row shows the original period and epoch from GCVS4.
The 6th row shows the spectral type from GCVS4.
The 7th and 8th row is the result of the Eddington/Plakidis test. Before the test is made the linear component of the diagram is removed and is then done with X<=15 and X<=5. This test is to see if the changes in the O-C is likely due to small random cycle-to-cycle fluctuations or a real change of the period. See Irregularities of period of long-period variable stars for more information about this test. In short ε is the average random error in the period and a is the average error in determine the time for maximum. The star falls outside the test if the term 2a² have a big negative value and could be a sign of real period changes.

From the O-C the period of the stars over time were also calculated and plotted and can be found here. The diagrams are the same as the link Per under each star, but on a separate page.

Capricornus
Mean period: 344.88, Mean epoch: 2439002.5    LC  Avg  Per ΔP: -0.25 ±0.04 (t:6.3, r2:0.234), ΔEpoch: -11.5 ΔP/C: -0 ±0.002 (t:0.2, r2:0) Mag at max: 10.7 ±0.8 (9.1-12.7) GCVS period: 345.13, GCVS epoch: 2439014 GCVS spectral type: C(Ne) E/P (X=15) ε2: 52.4, 2a2: 18.9, r2: 0.964 E/P (X=5) ε2: 52.4, 2a2: -4.5, r2: 0.98	Mean period: 269.81, Mean epoch: 2439303.3    LC  Avg  Per ΔP: 0.53 ±0.03 (t:15.7, r2:0.593), ΔEpoch: 36.3 ΔP/C: 0.009 ±0.001 (t:11.1, r2:0.425) Mag at max: 9.5 ±0.4 (8.4-10.7) GCVS period: 269.28, GCVS epoch: 2439267 GCVS spectral type: M2e-M6e E/P (X=15) ε2: 34.1, 2a2: -56.8, r2: 0.974 E/P (X=5) ε2: 17.6, 2a2: 3.1, r2: 0.998	Mean period: 203.20, Mean epoch: 2438960.2    LC  Avg  Per ΔP: 0.06 ±0.02 (t:2.8, r2:0.038), ΔEpoch: -14.8 ΔP/C: -0.002 ±0.001 (t:3.9, r2:0.07) Mag at max: 11.3 ±0.5 (9.2-12.8) GCVS period: 203.14, GCVS epoch: 2438975 GCVS spectral type: Me E/P (X=15) ε2: 25.9, 2a2: -15.7, r2: 0.996 E/P (X=5) ε2: 17.9, 2a2: 7.3, r2: 0.997
Mean period: 275.54, Mean epoch: 2440382.6    LC  Avg  Per ΔP: -0.18 ±0.04 (t:5, r2:0.137), ΔEpoch: -12.4 ΔP/C: -0.007 ±0.001 (t:5.2, r2:0.15) Mag at max: 9.2 ±0.5 (8.2-10.3) GCVS period: 275.72, GCVS epoch: 2440395 GCVS spectral type: M5e-M6e E/P (X=15) ε2: 24.9, 2a2: 7.7, r2: 0.973 E/P (X=5) ε2: 14.9, 2a2: 34.9, r2: 0.821	Mean period: 208.01, Mean epoch: 2438890.8    LC  Avg  Per ΔP: -1.66 ±0.03 (t:57.3, r2:0.949), ΔEpoch: -57.2 ΔP/C: -0.004 ±0.001 (t:4.6, r2:0.107) Mag at max: 11.6 ±0.4 (10.2-13.3) GCVS period: 209.67, GCVS epoch: 2438948 GCVS spectral type: M5e E/P (X=15) ε2: 31.3, 2a2: -36.6, r2: 0.983 E/P (X=5) ε2: 20.1, 2a2: 5, r2: 0.985	Mean period: 217.94, Mean epoch: 2438967.8    LC  Avg  Per ΔP: 0 ±0.02 (t:0.3, r2:0), ΔEpoch: -3.2 ΔP/C: -0.005 ±0 (t:14.6, r2:0.556) Mag at max: 11.2 ±0.4 (10.4-12.2) GCVS period: 217.94, GCVS epoch: 2438971 GCVS spectral type: E/P (X=15) ε2: 3.6, 2a2: 29, r2: 0.948 E/P (X=5) ε2: 7.1, 2a2: 18.3, r2: 0.933
Mean period: 410.26, Mean epoch: 2416791.9    LC  Avg  Per ΔP: -1.5 ±0.18 (t:8.6, r2:0.452), ΔEpoch: 56.9 ΔP/C: -0.041 ±0.009 (t:4.4, r2:0.182) Mag at max: 11.6 ±0.4 (10.6-12.6) GCVS period: 411.76, GCVS epoch: 2416735 GCVS spectral type: E/P (X=15) ε2: 412.6, 2a2: -648.8, r2: 0.988 E/P (X=5) ε2: 296, 2a2: -233.7, r2: 0.98	Mean period: 181.59, Mean epoch: 2442014.1    LC  Avg  Per ΔP: 0.11 ±0.01 (t:7.2, r2:0.193), ΔEpoch: -2.9 ΔP/C: -0.003 ±0 (t:9, r2:0.274) Mag at max: 9.5 ±0.4 (8.6-10.6) GCVS period: 181.48, GCVS epoch: 2442017 GCVS spectral type: M1e-M4e E/P (X=15) ε2: 5.9, 2a2: 14.4, r2: 0.961 E/P (X=5) ε2: 3.2, 2a2: 23.1, r2: 0.676	Mean period: 278.20, Mean epoch: 2439124.9    LC  Avg  Per ΔP: 0.66 ±0.03 (t:19.2, r2:0.724), ΔEpoch: 28.9 ΔP/C: 0.013 ±0.001 (t:12.7, r2:0.535) Mag at max: 9.3 ±0.5 (7.8-11.3) GCVS period: 277.54, GCVS epoch: 2439096 GCVS spectral type: M5e-M6e E/P (X=15) ε2: 13.8, 2a2: 3.3, r2: 0.978 E/P (X=5) ε2: 7.4, 2a2: 25.7, r2: 0.886
Mean period: 347.89, Mean epoch: 2438897.7    LC  Avg  Per ΔP: 0.52 ±0.04 (t:12.2, r2:0.567), ΔEpoch: 6.7 ΔP/C: 0.018 ±0.002 (t:10.5, r2:0.494) Mag at max: 10.2 ±0.6 (9.3-11.8) GCVS period: 347.37, GCVS epoch: 2438891 GCVS spectral type: M9e E/P (X=15) ε2: 10.8, 2a2: 65.9, r2: 0.826 E/P (X=5) ε2: 27.5, 2a2: 7.5, r2: 0.987
Carina
Mean period: 308.11, Mean epoch: 2441969.0    LC  Avg  Per ΔP: -0.6 ±0.02 (t:24.6, r2:0.781), ΔEpoch: -31 ΔP/C: -0.007 ±0.001 (t:7.3, r2:0.241) Mag at max: 4.7 ±0.3 (4.1-5.8) GCVS period: 308.71, GCVS epoch: 2442000 GCVS spectral type: M4e-M8e E/P (X=15) ε2: 23.2, 2a2: -5.4, r2: 0.996 E/P (X=5) ε2: 19.2, 2a2: 5.4, r2: 0.974	Mean period: 149.66, Mean epoch: 2442122.7    LC  Avg  Per ΔP: 0.17 ±0.01 (t:31.4, r2:0.759), ΔEpoch: 10.7 ΔP/C: 0.001 ±0 (t:8.5, r2:0.19) Mag at max: 5.8 ±0.3 (5.0-6.6) GCVS period: 149.49, GCVS epoch: 2442112 GCVS spectral type: K5e-M6e E/P (X=15) ε2: 3.1, 2a2: 26.8, r2: 0.958 E/P (X=5) ε2: 0.8, 2a2: 33.4, r2: 0.226	Mean period: 384.12, Mean epoch: 2439439.9    LC  Avg  Per ΔP: 0.11 ±0.06 (t:1.8, r2:0.031), ΔEpoch: -8.1 ΔP/C: 0.017 ±0.003 (t:5.4, r2:0.217) Mag at max: 10.9 ±0.4 (9.8-12.0) GCVS period: 384.01, GCVS epoch: 2439448 GCVS spectral type: M6e E/P (X=15) ε2: 27.2, 2a2: -17, r2: 0.983 E/P (X=5) ε2: 18.1, 2a2: 18.7, r2: 0.988
Mean period: 367.45, Mean epoch: 2438984.5    LC  Avg  Per ΔP: 1.77 ±0.07 (t:25.6, r2:0.849), ΔEpoch: 47.5 ΔP/C: 0.027 ±0.003 (t:8.3, r2:0.373) Mag at max: 11.4 ±0.6 (10.2-13.0) GCVS period: 365.68, GCVS epoch: 2438937 GCVS spectral type: M6e E/P (X=15) ε2: 69.7, 2a2: -91.6, r2: 0.993 E/P (X=5) ε2: 43.5, 2a2: -9.5, r2: 0.982	Mean period: 318.64, Mean epoch: 2438950.2    LC  Avg  Per ΔP: 0.02 ±0.07 (t:0.3, r2:0.001), ΔEpoch: -40.8 ΔP/C: -0.004 ±0.004 (t:1.2, r2:0.012) Mag at max: 9.2 ±0.3 (8.3-10.0) GCVS period: 318.62, GCVS epoch: 2438991 GCVS spectral type: M4e-M7e E/P (X=15) ε2: 59.7, 2a2: -101.5, r2: 0.984 E/P (X=5) ε2: 33.4, 2a2: -11.3, r2: 0.983	Mean period: 421.30, Mean epoch: 2438754.2    LC  Avg  Per ΔP: -3 ±0.1 (t:29.7, r2:0.909), ΔEpoch: 10.2 ΔP/C: 0.012 ±0.007 (t:1.7, r2:0.033) Mag at max: 11.3 ±0.4 (10.6-12.7) GCVS period: 424.3, GCVS epoch: 2438744 GCVS spectral type: S7,8e E/P (X=15) ε2: 110.5, 2a2: -134.1, r2: 0.987 E/P (X=5) ε2: 67.4, 2a2: -0.9, r2: 0.999
Mean period: 272.56, Mean epoch: 2439582.4    LC  Avg  Per ΔP: -0.21 ±0.03 (t:7.1, r2:0.256), ΔEpoch: -3.6 ΔP/C: -0.008 ±0.001 (t:7.4, r2:0.276) Mag at max: 10.3 ±0.5 (9.2-12.0) GCVS period: 272.77, GCVS epoch: 2439586 GCVS spectral type: M4e-M8e E/P (X=15) ε2: 12.2, 2a2: 17.5, r2: 0.977 E/P (X=5) ε2: 11.3, 2a2: 19.2, r2: 0.823	Mean period: 442.52, Mean epoch: 2438240.7    LC  Avg  Per ΔP: -10.48 ±0.32 (t:32.5, r2:0.944), ΔEpoch: 115.7 ΔP/C: 0.109 ±0.023 (t:4.8, r2:0.271) Mag at max: 10.3 ±0.4 (9.6-11.0) GCVS period: 453, GCVS epoch: 2438125 GCVS spectral type: M8e E/P (X=15) ε2: 366.4, 2a2: -595.1, r2: 0.917 E/P (X=5) ε2: 229.9, 2a2: -150.7, r2: 0.947
Cassiopeia
Mean period: 430.80, Mean epoch: 2444496.8    LC  Avg  Per ΔP: 0.34 ±0.05 (t:6.7, r2:0.249), ΔEpoch: 33.8 ΔP/C: -0.005 ±0.003 (t:2, r2:0.029) Mag at max: 6.3 ±0.6 (4.7-7.8) GCVS period: 430.46, GCVS epoch: 2444463 GCVS spectral type: M6e-M10e E/P (X=15) ε2: 75.8, 2a2: -116.4, r2: 0.987 E/P (X=5) ε2: 45.3, 2a2: -12.2, r2: 0.971	Mean period: 612.65, Mean epoch: 2443848.7    LC  Avg  Per ΔP: 0.22 ±0.13 (t:1.7, r2:0.032), ΔEpoch: -21.3 ΔP/C: 0.046 ±0.009 (t:5.2, r2:0.227) Mag at max: 9.2 ±0.9 (7.2-10.9) GCVS period: 612.43, GCVS epoch: 2443870 GCVS spectral type: S3,4e-S5,8e E/P (X=15) ε2: 120.9, 2a2: 72.1, r2: 0.986 E/P (X=5) ε2: 86.7, 2a2: 141.4, r2: 0.954	Mean period: 444.51, Mean epoch: 2444101.9    LC  Avg  Per ΔP: -0.32 ±0.09 (t:3.6, r2:0.095), ΔEpoch: -58.1 ΔP/C: -0.031 ±0.005 (t:6.6, r2:0.264) Mag at max: 7.8 ±0.3 (6.9-8.5) GCVS period: 444.83, GCVS epoch: 2444160 GCVS spectral type: M6e-M9e E/P (X=15) ε2: 124.7, 2a2: -125.1, r2: 0.989 E/P (X=5) ε2: 85.6, 2a2: 18.6, r2: 0.993
Mean period: 276.95, Mean epoch: 2444623.9    LC  Avg  Per ΔP: -0.24 ±0.03 (t:8.1, r2:0.282), ΔEpoch: 2.9 ΔP/C: -0.009 ±0.001 (t:8.1, r2:0.282) Mag at max: 8.6 ±0.4 (7.7-9.6) GCVS period: 277.19, GCVS epoch: 2444621 GCVS spectral type: S3,5e-S8,6e E/P (X=15) ε2: 14.8, 2a2: 5.4, r2: 0.972 E/P (X=5) ε2: 9, 2a2: 28, r2: 0.986	Mean period: 228.86, Mean epoch: 2444577.0    LC  Avg  Per ΔP: 0.03 ±0.05 (t:0.7, r2:0.002), ΔEpoch: -28 ΔP/C: 0.019 ±0.001 (t:15.6, r2:0.551) Mag at max: 7.9 ±0.2 (7.4-8.6) GCVS period: 228.83, GCVS epoch: 2444605 GCVS spectral type: M5e-M8.5e E/P (X=15) ε2: 44.7, 2a2: -71.1, r2: 0.984 E/P (X=5) ε2: 29.6, 2a2: -12.9, r2: 0.996	Mean period: 405.67, Mean epoch: 2444205.7    LC  Avg  Per ΔP: 0.1 ±0.05 (t:2.1, r2:0.035), ΔEpoch: -3.3 ΔP/C: -0.003 ±0.003 (t:0.9, r2:0.007) Mag at max: 8.9 ±0.2 (8.1-9.8) GCVS period: 405.57, GCVS epoch: 2444209 GCVS spectral type: C7,1e(SC5/9e) E/P (X=15) ε2: 43.8, 2a2: 19.6, r2: 0.983 E/P (X=5) ε2: 37.4, 2a2: 32.6, r2: 0.953
Mean period: 423.77, Mean epoch: 2443925.0    LC  Avg  Per ΔP: 0.93 ±0.15 (t:6.3, r2:0.274), ΔEpoch: 3 ΔP/C: -0.017 ±0.01 (t:1.6, r2:0.025) Mag at max: 10.3 ±0.5 (8.8-11.5) GCVS period: 422.84, GCVS epoch: 2443922 GCVS spectral type: C5,4e(N1e) E/P (X=15) ε2: 301, 2a2: -432.4, r2: 0.976 E/P (X=5) ε2: 148.2, 2a2: 119.4, r2: 0.985	Mean period: 413.27, Mean epoch: 2444538.0    LC  Avg  Per ΔP: -0.21 ±0.09 (t:2.3, r2:0.043), ΔEpoch: 32 ΔP/C: -0.002 ±0.006 (t:0.3, r2:0.001) Mag at max: 10 ±0.4 (8.7-10.8) GCVS period: 413.48, GCVS epoch: 2444506 GCVS spectral type: M6e-M8e E/P (X=15) ε2: 138.6, 2a2: -208.3, r2: 0.991 E/P (X=5) ε2: 86.1, 2a2: -38.1, r2: 0.981	Mean period: 496.85, Mean epoch: 2442416.1    LC  Avg  Per ΔP: 1.14 ±0.11 (t:10.3, r2:0.532), ΔEpoch: 40.1 ΔP/C: 0.021 ±0.009 (t:2.4, r2:0.059) Mag at max: 10.2 ±0.5 (8.6-11.2) GCVS period: 495.71, GCVS epoch: 2442376 GCVS spectral type: M7e E/P (X=15) ε2: 168.9, 2a2: -171.2, r2: 0.986 E/P (X=5) ε2: 130.7, 2a2: -75.3, r2: 0.97
Mean period: 299.53, Mean epoch: 2444427.7    LC  Avg  Per ΔP: -0.54 ±0.08 (t:6.4, r2:0.218), ΔEpoch: -42.3 ΔP/C: -0.03 ±0.004 (t:8.6, r2:0.336) Mag at max: 10.7 ±0.3 (10.0-11.5) GCVS period: 300.07, GCVS epoch: 2444470 GCVS spectral type: M5e E/P (X=15) ε2: 127.3, 2a2: -228.5, r2: 0.978 E/P (X=5) ε2: 79.5, 2a2: -43, r2: 0.986	Mean period: 332.17, Mean epoch: 2444321.0    LC  Avg  Per ΔP: 0.49 ±0.05 (t:10.3, r2:0.449), ΔEpoch: 8 ΔP/C: 0.023 ±0.002 (t:11.8, r2:0.518) Mag at max: 9.4 ±0.5 (7.4-10.7) GCVS period: 331.68, GCVS epoch: 2444313 GCVS spectral type: M5.5e-M6.5Se E/P (X=15) ε2: 14.7, 2a2: 24.7, r2: 0.978 E/P (X=5) ε2: 13.5, 2a2: 32.7, r2: 0.942	Mean period: 139.77, Mean epoch: 2444180.6    LC  Avg  Per ΔP: -0.8 ±0.01 (t:65.4, r2:0.937), ΔEpoch: -27.4 ΔP/C: -0 ±0 (t:1, r2:0.003) Mag at max: 9.8 ±0.3 (8.8-10.7) GCVS period: 140.57, GCVS epoch: 2444208 GCVS spectral type: M3e-M7e E/P (X=15) ε2: 11.4, 2a2: -15.3, r2: 0.963 E/P (X=5) ε2: 5.3, 2a2: 8, r2: 0.953
Mean period: 626.41, Mean epoch: 2443629.5    LC  Avg  Per ΔP: -18.59 ±1.82 (t:10.2, r2:0.676), ΔEpoch: 224.5 ΔP/C: 1.37 ±0.098 (t:14, r2:0.801) Mag at max: 11.3 ±0.4 (10.5-12.2) GCVS period: 645, GCVS epoch: 2443405 GCVS spectral type: M6 E/P (X=15) ε2: 7538.6, 2a2: -18530.5, r2: 0.959 E/P (X=5) ε2: 3235.6, 2a2: -3382.9, r2: 0.951	Mean period: 169.24, Mean epoch: 2444680.2    LC  Avg  Per ΔP: -0 ±0.01 (t:0.1, r2:0), ΔEpoch: 4.2 ΔP/C: -0.001 ±0 (t:3.3, r2:0.057) Mag at max: 9.9 ±0.3 (9.4-11.3) GCVS period: 169.24, GCVS epoch: 2444676 GCVS spectral type: M0e-M3e E/P (X=15) ε2: 3.9, 2a2: 21.6, r2: 0.942 E/P (X=5) ε2: 1, 2a2: 29.4, r2: 0.387	Mean period: 477.54, Mean epoch: 2444343.0    LC  Avg  Per ΔP: 0.98 ±0.11 (t:9.3, r2:0.52), ΔEpoch: 33 ΔP/C: 0.031 ±0.007 (t:4.1, r2:0.174) Mag at max: 8.9 ±0.4 (8.2-10.2) GCVS period: 476.56, GCVS epoch: 2444310 GCVS spectral type: S6,5pe+G E/P (X=15) ε2: 72.8, 2a2: 37.5, r2: 0.984 E/P (X=5) ε2: 43.5, 2a2: 132.1, r2: 0.81
Mean period: 424.62, Mean epoch: 2457033.1    LC  Avg  Per ΔP: 0.62 ±0.54 (t:1.2, r2:0.046), ΔEpoch: 33.1 ΔP/C: -0.592 ±0.083 (t:7.1, r2:0.652) Mag at max: 11.1 ±0.3 (10.6-12.0) GCVS period: 424, GCVS epoch: 2457000 GCVS spectral type: E/P (X=15) ε2: 143.4, 2a2: 17.4, r2: 0.911 E/P (X=5) ε2: 89.6, 2a2: 101.8, r2: 0.928	Mean period: 347.85, Mean epoch: 2457332.3    LC  Avg  Per ΔP: 0.25 ±0.04 (t:6.3, r2:0.332), ΔEpoch: 3.3 ΔP/C: 0.004 ±0.003 (t:1.5, r2:0.027) Mag at max: 9.7 ±0.3 (9.1-10.4) GCVS period: 347.6, GCVS epoch: 2457329 GCVS spectral type: E/P (X=15) ε2: 10.4, 2a2: 84.8, r2: 0.909 E/P (X=5) ε2: 14.2, 2a2: 67.3, r2: 0.844
Centaurus
Mean period: 542.60, Mean epoch: 2441817.4    LC  Avg  Per ΔP: -3.6 ±0.99 (t:3.6, r2:0.127), ΔEpoch: -124.6 ΔP/C: -0.672 ±0.019 (t:35.8, r2:0.935) Mag at max: 6.1 ±0.4 (5.1-7.0) GCVS period: 546.2, GCVS epoch: 2441942 GCVS spectral type: M4e-M9.5 E/P (X=15) ε2: 3375, 2a2: -8631.7, r2: 0.96 E/P (X=5) ε2: 1532.3, 2a2: -1572.5, r2: 0.981	Mean period: 220.10, Mean epoch: 2439929.3    LC  Avg  Per ΔP: -0.18 ±0.01 (t:12, r2:0.41), ΔEpoch: -11.7 ΔP/C: -0.001 ±0.001 (t:2.8, r2:0.037) Mag at max: 8.3 ±0.3 (7.6-9.2) GCVS period: 220.28, GCVS epoch: 2439941 GCVS spectral type: M3II:e-M6.5e E/P (X=15) ε2: 12, 2a2: -2.4, r2: 0.979 E/P (X=5) ε2: 7.1, 2a2: 15.8, r2: 0.977	Mean period: 201.50, Mean epoch: 2441784.1    LC  Avg  Per ΔP: -0.07 ±0.01 (t:5.5, r2:0.12), ΔEpoch: -1.9 ΔP/C: -0 ±0 (t:0.8, r2:0.003) Mag at max: 8.4 ±0.3 (7.6-9.1) GCVS period: 201.57, GCVS epoch: 2441786 GCVS spectral type: M3e-M8(III)e E/P (X=15) ε2: 8.1, 2a2: 5.5, r2: 0.996 E/P (X=5) ε2: 7, 2a2: 8.9, r2: 0.989
Mean period: 315.87, Mean epoch: 2441729.3    LC  Avg  Per ΔP: 0.77 ±0.05 (t:14.2, r2:0.592), ΔEpoch: 20.3 ΔP/C: 0.028 ±0.001 (t:22.4, r2:0.785) Mag at max: 8 ±0.5 (7.0-9.3) GCVS period: 315.1, GCVS epoch: 2441709 GCVS spectral type: M5e-M8e E/P (X=15) ε2: 27.5, 2a2: -5.8, r2: 0.996 E/P (X=5) ε2: 23.9, 2a2: 4.5, r2: 1	Mean period: 164.31, Mean epoch: 2441966.0    LC  Avg  Per ΔP: -0.06 ±0.01 (t:9.4, r2:0.248), ΔEpoch: -0 ΔP/C: -0 ±0 (t:0.5, r2:0.001) Mag at max: 8.7 ±0.5 (7.3-10.0) GCVS period: 164.37, GCVS epoch: 2441966 GCVS spectral type: M2e-M6.5e E/P (X=15) ε2: 3.9, 2a2: 15.9, r2: 0.986 E/P (X=5) ε2: 3.5, 2a2: 16.4, r2: 0.966	Mean period: 255.39, Mean epoch: 2442104.1    LC  Avg  Per ΔP: 0.37 ±0.04 (t:9.2, r2:0.337), ΔEpoch: 6.1 ΔP/C: -0.001 ±0.002 (t:0.4, r2:0.001) Mag at max: 9.1 ±0.3 (8.1-10.1) GCVS period: 255.02, GCVS epoch: 2442098 GCVS spectral type: M6e-M9e E/P (X=15) ε2: 52.2, 2a2: -25.3, r2: 0.984 E/P (X=5) ε2: 35.8, 2a2: 37.3, r2: 0.953
Mean period: 446.17, Mean epoch: 2440985.3    LC  Avg  Per ΔP: 0.17 ±0.1 (t:1.7, r2:0.027), ΔEpoch: 25.3 ΔP/C: 0.029 ±0.006 (t:4.6, r2:0.167) Mag at max: 7.7 ±0.3 (7.2-8.4) GCVS period: 446, GCVS epoch: 2440960 GCVS spectral type: C(N3e) E/P (X=15) ε2: 79.9, 2a2: 127.2, r2: 0.96 E/P (X=5) ε2: 101.4, 2a2: 17, r2: 0.997	Mean period: 328.21, Mean epoch: 2442107.8    LC  Avg  Per ΔP: 0.31 ±0.05 (t:6.7, r2:0.261), ΔEpoch: -6.2 ΔP/C: 0.003 ±0.002 (t:1.3, r2:0.014) Mag at max: 9.6 ±0.5 (8.7-11.7) GCVS period: 327.9, GCVS epoch: 2442114 GCVS spectral type: M5e-M8e E/P (X=15) ε2: 25.5, 2a2: -8.2, r2: 0.96 E/P (X=5) ε2: 16, 2a2: 31.3, r2: 0.964	Mean period: 200.78, Mean epoch: 2428702.4    LC  Avg  Per ΔP: -0.78 ±0.03 (t:22.7, r2:0.832), ΔEpoch: -37.6 ΔP/C: -0.005 ±0.001 (t:4.6, r2:0.17) Mag at max: 9.6 ±0.3 (9.1-10.2) GCVS period: 201.56, GCVS epoch: 2428740 GCVS spectral type: Me E/P (X=15) ε2: 44.9, 2a2: -83.1, r2: 0.886 E/P (X=5) ε2: 22.8, 2a2: 2.9, r2: 0.991
Cepheus
Mean period: 486.33, Mean epoch: 2443765.2    LC  Avg  Per ΔP: -0.51 ±0.1 (t:4.9, r2:0.177), ΔEpoch: -21.8 ΔP/C: -0.04 ±0.005 (t:7.5, r2:0.334) Mag at max: 8.4 ±0.6 (6.8-10.9) GCVS period: 486.84, GCVS epoch: 2443787 GCVS spectral type: C7,4e(N8e) E/P (X=15) ε2: 167.1, 2a2: -66.6, r2: 0.989 E/P (X=5) ε2: 128.3, 2a2: 48.4, r2: 0.948	Mean period: 389.56, Mean epoch: 2444252.6    LC  Avg  Per ΔP: 1.42 ±0.12 (t:11.3, r2:0.492), ΔEpoch: 75.6 ΔP/C: 0.013 ±0.007 (t:1.8, r2:0.023) Mag at max: 6.1 ±0.2 (5.5-6.6) GCVS period: 388.14, GCVS epoch: 2444177 GCVS spectral type: M5-M9IIIe E/P (X=15) ε2: 397.5, 2a2: -917.3, r2: 0.975 E/P (X=5) ε2: 196.1, 2a2: -185.5, r2: 0.97	Mean period: 536.42, Mean epoch: 2443871.2    LC  Avg  Per ΔP: 1.23 ±0.13 (t:9.7, r2:0.533), ΔEpoch: 37.2 ΔP/C: 0.067 ±0.009 (t:7.4, r2:0.403) Mag at max: 9.5 ±0.6 (8.1-11.2) GCVS period: 535.19, GCVS epoch: 2443834 GCVS spectral type: M4e-M7e E/P (X=15) ε2: 83.1, 2a2: -41.2, r2: 0.996 E/P (X=5) ε2: 64.1, 2a2: 13.2, r2: 0.991
Mean period: 332.70, Mean epoch: 2444136.0    LC  Avg  Per ΔP: 0.13 ±0.03 (t:4.8, r2:0.151), ΔEpoch: 2 ΔP/C: 0.007 ±0.001 (t:4.4, r2:0.128) Mag at max: 9.6 ±0.4 (8.6-10.7) GCVS period: 332.57, GCVS epoch: 2444134 GCVS spectral type: M5e-M6e E/P (X=15) ε2: 10.9, 2a2: 9.6, r2: 0.979 E/P (X=5) ε2: 5.4, 2a2: 27.1, r2: 0.662	Mean period: 279.08, Mean epoch: 2442143.9    LC  Avg  Per ΔP: -0.08 ±0.04 (t:2.1, r2:0.027), ΔEpoch: -12.1 ΔP/C: 0.004 ±0.002 (t:2.1, r2:0.027) Mag at max: 10.9 ±0.4 (10.2-12.1) GCVS period: 279.16, GCVS epoch: 2442156 GCVS spectral type: M2e-M7e E/P (X=15) ε2: 45, 2a2: -63.6, r2: 0.98 E/P (X=5) ε2: 26.1, 2a2: 6, r2: 0.998	Mean period: 384.26, Mean epoch: 2443603.0    LC  Avg  Per ΔP: 0.08 ±0.06 (t:1.2, r2:0.012), ΔEpoch: 2 ΔP/C: 0.006 ±0.004 (t:1.3, r2:0.015) Mag at max: 10.3 ±0.5 (9.3-11.8) GCVS period: 384.18, GCVS epoch: 2443601 GCVS spectral type: M6e-M8e E/P (X=15) ε2: 81.3, 2a2: -79.4, r2: 0.991 E/P (X=5) ε2: 60.6, 2a2: -30.8, r2: 0.98
Mean period: 149.44, Mean epoch: 2444564.0    LC  Avg  Per ΔP: 0.38 ±0.02 (t:20.5, r2:0.649), ΔEpoch: 31 ΔP/C: 0.007 ±0 (t:38.4, r2:0.867) Mag at max: 9.8 ±0.2 (9.4-10.4) GCVS period: 149.06, GCVS epoch: 2444533 GCVS spectral type: M0e E/P (X=15) ε2: 9.9, 2a2: 19, r2: 0.976 E/P (X=5) ε2: 4.7, 2a2: 36, r2: 0.804	Mean period: 327.35, Mean epoch: 2442651.8    LC  Avg  Per ΔP: 0.76 ±0.04 (t:17.2, r2:0.723), ΔEpoch: 27.8 ΔP/C: 0.014 ±0.002 (t:7.7, r2:0.346) Mag at max: 9.5 ±0.3 (9.0-10.1) GCVS period: 326.59, GCVS epoch: 2442624 GCVS spectral type: S3.5,8e-S4,8:e E/P (X=15) ε2: 27.8, 2a2: 5.2, r2: 0.963 E/P (X=5) ε2: 18.5, 2a2: 43.7, r2: 0.979	Mean period: 323.95, Mean epoch: 2441144.8    LC  Avg  Per ΔP: -0.55 ±0.09 (t:5.8, r2:0.308), ΔEpoch: -15.2 ΔP/C: 0.027 ±0.005 (t:5.6, r2:0.296) Mag at max: 11 ±0.3 (10.4-11.8) GCVS period: 324.5, GCVS epoch: 2441160 GCVS spectral type: M8e E/P (X=15) ε2: 137.2, 2a2: -289.4, r2: 0.959 E/P (X=5) ε2: 78.7, 2a2: -52.7, r2: 0.957
Mean period: 397.26, Mean epoch: 2437043.4    LC  Avg  Per ΔP: 2.26 ±0.07 (t:33.5, r2:0.957), ΔEpoch: 20.4 ΔP/C: -0.012 ±0.006 (t:1.9, r2:0.067) Mag at max: 10.5 ±0.7 (9.4-11.8) GCVS period: 395, GCVS epoch: 2437023 GCVS spectral type: C(N) E/P (X=15) ε2: 3.3, 2a2: 158.3, r2: 0.062 E/P (X=5) ε2: 35.9, 2a2: 67.1, r2: 0.663	Mean period: 429.78, Mean epoch: 2444181.3    LC  Avg  Per ΔP: -0.36 ±0.17 (t:2.1, r2:0.072), ΔEpoch: -66.7 ΔP/C: 0.003 ±0.014 (t:0.2, r2:0.001) Mag at max: 10.6 ±0.4 (9.9-11.6) GCVS period: 430.14, GCVS epoch: 2444248 GCVS spectral type: M7 E/P (X=15) ε2: 278, 2a2: -515, r2: 0.97 E/P (X=5) ε2: 134.7, 2a2: -65.4, r2: 0.967
Cetus
Mean period: 166.12, Mean epoch: 2443775.4    LC  Avg  Per ΔP: -0.12 ±0.01 (t:12.7, r2:0.36), ΔEpoch: 7.4 ΔP/C: -0.001 ±0 (t:4.6, r2:0.07) Mag at max: 8.2 ±0.4 (7.3-9.8) GCVS period: 166.24, GCVS epoch: 2443768 GCVS spectral type: M4e-M9 E/P (X=15) ε2: 3.2, 2a2: 18.3, r2: 0.97 E/P (X=5) ε2: 4.2, 2a2: 15.2, r2: 0.919	Mean period: 319.97, Mean epoch: 2442608.0    LC  Avg  Per ΔP: -0.48 ±0.03 (t:14.5, r2:0.582), ΔEpoch: -42 ΔP/C: 0.001 ±0.001 (t:0.7, r2:0.003) Mag at max: 8.3 ±0.5 (7.4-10.6) GCVS period: 320.45, GCVS epoch: 2442650 GCVS spectral type: M3e-M6.5e: E/P (X=15) ε2: 55, 2a2: -12, r2: 0.97 E/P (X=5) ε2: 46.8, 2a2: 2.9, r2: 0.982	Mean period: 234.58, Mean epoch: 2442137.1    LC  Avg  Per ΔP: -0.18 ±0.01 (t:12.9, r2:0.466), ΔEpoch: 0.1 ΔP/C: 0.001 ±0 (t:2.6, r2:0.035) Mag at max: 7.5 ±0.4 (6.8-8.6) GCVS period: 234.76, GCVS epoch: 2442137 GCVS spectral type: M2e-M6e E/P (X=15) ε2: 9.9, 2a2: 12.4, r2: 0.983 E/P (X=5) ε2: 6.6, 2a2: 21.8, r2: 0.933
Mean period: 260.37, Mean epoch: 2438795.3    LC  Avg  Per ΔP: 2.55 ±0.03 (t:84.8, r2:0.978), ΔEpoch: 3.3 ΔP/C: 0.011 ±0.001 (t:12.2, r2:0.485) Mag at max: 9.6 ±0.4 (8.6-10.6) GCVS period: 257.82, GCVS epoch: 2438792 GCVS spectral type: M3e E/P (X=15) ε2: 14.7, 2a2: 3.4, r2: 0.997 E/P (X=5) ε2: 12.9, 2a2: 9.9, r2: 0.98	Mean period: 351.02, Mean epoch: 2438571.0    LC  Avg  Per ΔP: -0.29 ±0.08 (t:3.4, r2:0.083), ΔEpoch: -7 ΔP/C: -0.012 ±0.005 (t:2.4, r2:0.044) Mag at max: 8.2 ±0.4 (7.5-9.6) GCVS period: 351.31, GCVS epoch: 2438578 GCVS spectral type: S6,3e-S9,2e E/P (X=15) ε2: 128.4, 2a2: -161.8, r2: 0.992 E/P (X=5) ε2: 94.4, 2a2: -45.3, r2: 0.992	Mean period: 177.50, Mean epoch: 2441955.6    LC  Avg  Per ΔP: 0.36 ±0.02 (t:17.7, r2:0.56), ΔEpoch: 2.6 ΔP/C: -0 ±0.001 (t:0, r2:0) Mag at max: 8.9 ±0.2 (8.0-9.5) GCVS period: 177.14, GCVS epoch: 2441953 GCVS spectral type: M2e(S)-M6e E/P (X=15) ε2: 25, 2a2: -19.8, r2: 0.985 E/P (X=5) ε2: 17.7, 2a2: 9.3, r2: 0.971
Mean period: 184.87, Mean epoch: 2441673.5    LC  Avg  Per ΔP: 0.06 ±0.02 (t:4, r2:0.064), ΔEpoch: -5.5 ΔP/C: -0.004 ±0 (t:9.9, r2:0.302) Mag at max: 9 ±0.3 (8.4-9.7) GCVS period: 184.81, GCVS epoch: 2441679 GCVS spectral type: M1e-M6.5e E/P (X=15) ε2: 14.3, 2a2: -5.1, r2: 0.986 E/P (X=5) ε2: 9.5, 2a2: 11.5, r2: 0.982	Mean period: 331.88, Mean epoch: 2444800.3    LC  Avg  Per ΔP: -0.08 ±0.02 (t:3.4, r2:0.043), ΔEpoch: -38.7 ΔP/C: 0.003 ±0 (t:9.9, r2:0.278) Mag at max: 3.5 ±0.5 (1.9-5.1) GCVS period: 331.96, GCVS epoch: 2444839 GCVS spectral type: M5e-M9e E/P (X=15) ε2: 30.6, 2a2: -5.4, r2: 0.989 E/P (X=5) ε2: 24.4, 2a2: 16.5, r2: 0.995
Chamaeleon
Mean period: 333.93, Mean epoch: 2441986.5    LC  Avg  Per ΔP: -0.65 ±0.03 (t:18.9, r2:0.72), ΔEpoch: -19.5 ΔP/C: -0.005 ±0.002 (t:2.5, r2:0.045) Mag at max: 8.4 ±0.5 (7.5-9.9) GCVS period: 334.58, GCVS epoch: 2442006 GCVS spectral type: M4e-M8e E/P (X=15) ε2: 32.7, 2a2: 12.5, r2: 0.969 E/P (X=5) ε2: 31.3, 2a2: 3.6, r2: 0.998
Columba
Mean period: 327.92, Mean epoch: 2442009.9    LC  Avg  Per ΔP: 0.3 ±0.03 (t:10.4, r2:0.455), ΔEpoch: -6.1 ΔP/C: -0.003 ±0.002 (t:1.9, r2:0.029) Mag at max: 8.8 ±0.5 (7.9-10.1) GCVS period: 327.62, GCVS epoch: 2442016 GCVS spectral type: M3e-M7 E/P (X=15) ε2: 10.4, 2a2: 24, r2: 0.967 E/P (X=5) ε2: 11.9, 2a2: 14.8, r2: 0.989	Mean period: 325.82, Mean epoch: 2440568.7    LC  Avg  Per ΔP: -0.03 ±0.03 (t:0.9, r2:0.006), ΔEpoch: 9.7 ΔP/C: -0.003 ±0.002 (t:1.9, r2:0.027) Mag at max: 9.3 ±0.5 (7.7-10.5) GCVS period: 325.85, GCVS epoch: 2440559 GCVS spectral type: M6e-M8 E/P (X=15) ε2: 20.1, 2a2: 1.3, r2: 0.989 E/P (X=5) ε2: 17.8, 2a2: 3.1, r2: 0.979	Mean period: 225.98, Mean epoch: 2441968.5    LC  Avg  Per ΔP: 0.14 ±0.03 (t:4, r2:0.076), ΔEpoch: -4.5 ΔP/C: 0.013 ±0.001 (t:15.5, r2:0.551) Mag at max: 7.4 ±0.3 (6.7-9.1) GCVS period: 225.84, GCVS epoch: 2441973 GCVS spectral type: M3e-M6e E/P (X=15) ε2: 32.7, 2a2: -55.5, r2: 0.964 E/P (X=5) ε2: 19, 2a2: 1.2, r2: 0.98
Coma Berenices
Mean period: 362.49, Mean epoch: 2443498.0    LC  Avg  Per ΔP: -0.33 ±0.04 (t:9.3, r2:0.375), ΔEpoch: -41 ΔP/C: -0.002 ±0.002 (t:1.4, r2:0.013) Mag at max: 8.7 ±0.5 (7.3-10.1) GCVS period: 362.82, GCVS epoch: 2443539 GCVS spectral type: M5e-M8ep E/P (X=15) ε2: 25.3, 2a2: 1.8, r2: 0.965 E/P (X=5) ε2: 16.5, 2a2: 37.5, r2: 0.863
Corona Austrina
Mean period: 147.56, Mean epoch: 2433191.3    LC  Avg  Per ΔP: 0.06 ±0.01 (t:7.9, r2:0.322), ΔEpoch: 16.3 ΔP/C: -0 ±0 (t:0.1, r2:0) Mag at max: 8.7 ±0.4 (8.0-9.5) GCVS period: 147.5, GCVS epoch: 2433175 GCVS spectral type: M2Ibe E/P (X=15) ε2: 1.9, 2a2: 55.8, r2: 0.574 E/P (X=5) ε2: 3.2, 2a2: 50.2, r2: 0.294
Corona Borealis
Mean period: 360.28, Mean epoch: 2444633.5    LC  Avg  Per ΔP: 0.02 ±0.04 (t:0.5, r2:0.002), ΔEpoch: 29.5 ΔP/C: -0.007 ±0.002 (t:4.1, r2:0.095) Mag at max: 7.2 ±0.4 (6.3-8.4) GCVS period: 360.26, GCVS epoch: 2444604 GCVS spectral type: M6e-M8e E/P (X=15) ε2: 25.2, 2a2: -7.7, r2: 0.991 E/P (X=5) ε2: 16.1, 2a2: 21.3, r2: 0.941	Mean period: 357.77, Mean epoch: 2443767.7    LC  Avg  Per ΔP: 0.14 ±0.04 (t:3.3, r2:0.076), ΔEpoch: 4.7 ΔP/C: -0.008 ±0.002 (t:4.2, r2:0.119) Mag at max: 8 ±0.6 (6.7-9.3) GCVS period: 357.63, GCVS epoch: 2443763 GCVS spectral type: C6,2e(N2e) E/P (X=15) ε2: 36.8, 2a2: 31.8, r2: 0.994 E/P (X=5) ε2: 33.6, 2a2: 40.6, r2: 0.991	Mean period: 238.60, Mean epoch: 2444196.5    LC  Avg  Per ΔP: 0.2 ±0.03 (t:7.6, r2:0.233), ΔEpoch: 4.5 ΔP/C: 0.011 ±0.001 (t:16.9, r2:0.6) Mag at max: 8.5 ±0.3 (7.8-9.6) GCVS period: 238.4, GCVS epoch: 2444192 GCVS spectral type: M2e-M5e E/P (X=15) ε2: 18.4, 2a2: -11.7, r2: 0.988 E/P (X=5) ε2: 11, 2a2: 13.4, r2: 0.968
Mean period: 240.93, Mean epoch: 2443695.1    LC  Avg  Per ΔP: -0.24 ±0.02 (t:10.4, r2:0.368), ΔEpoch: -23.9 ΔP/C: -0.002 ±0.001 (t:2.4, r2:0.031) Mag at max: 9.2 ±0.3 (8.1-10.0) GCVS period: 241.17, GCVS epoch: 2443719 GCVS spectral type: M5e-M7e E/P (X=15) ε2: 20.6, 2a2: -15.8, r2: 0.986 E/P (X=5) ε2: 12.8, 2a2: 12, r2: 0.991	Mean period: 250.88, Mean epoch: 2442504.1    LC  Avg  Per ΔP: 0.2 ±0.02 (t:12.4, r2:0.485), ΔEpoch: -9.9 ΔP/C: 0.006 ±0.001 (t:9.9, r2:0.377) Mag at max: 9.8 ±0.5 (8.8-11.4) GCVS period: 250.68, GCVS epoch: 2442514 GCVS spectral type: M4e-M5e E/P (X=15) ε2: 4.9, 2a2: 27, r2: 0.912 E/P (X=5) ε2: 6.5, 2a2: 20.7, r2: 0.778
Corvus
Mean period: 317.01, Mean epoch: 2442792.2    LC  Avg  Per ΔP: -0.02 ±0.05 (t:0.5, r2:0.001), ΔEpoch: 11.2 ΔP/C: 0.013 ±0.002 (t:7.5, r2:0.278) Mag at max: 7.7 ±0.4 (6.7-9.0) GCVS period: 317.03, GCVS epoch: 2442781 GCVS spectral type: M4.5e-M9:e E/P (X=15) ε2: 29.2, 2a2: -17.1, r2: 0.986 E/P (X=5) ε2: 20.7, 2a2: 15.4, r2: 0.982	Mean period: 283.52, Mean epoch: 2438478.3    LC  Avg  Per ΔP: 0.1 ±0.03 (t:3.3, r2:0.113), ΔEpoch: -1.7 ΔP/C: -0.001 ±0.002 (t:0.6, r2:0.004) Mag at max: 9.8 ±0.3 (9.3-10.3) GCVS period: 283.42, GCVS epoch: 2438480 GCVS spectral type: M5e E/P (X=15) ε2: 19.8, 2a2: 37.3, r2: 0.959 E/P (X=5) ε2: 21.6, 2a2: 23, r2: 0.863	Mean period: 194.03, Mean epoch: 2429364.1    LC  Avg  Per ΔP: 0.4 ±0.01 (t:26.8, r2:0.865), ΔEpoch: -16.9 ΔP/C: 0.002 ±0.001 (t:3.8, r2:0.115) Mag at max: 11 ±0.3 (10.5-11.9) GCVS period: 193.63, GCVS epoch: 2429381 GCVS spectral type: M2e E/P (X=15) ε2: 5.2, 2a2: 44.6, r2: 0.831 E/P (X=5) ε2: 5.4, 2a2: 42.3, r2: 0.857
Crater
Mean period: 168.07, Mean epoch: 2428265.3    LC  Avg  Per ΔP: -0.93 ±0.01 (t:97.7, r2:0.987), ΔEpoch: -3.7 ΔP/C: 0.001 ±0 (t:2.4, r2:0.045) Mag at max: 9.8 ±0.3 (9.1-10.6) GCVS period: 169, GCVS epoch: 2428269 GCVS spectral type: M0e E/P (X=15) ε2: 5.1, 2a2: 22.6, r2: 0.841 E/P (X=5) ε2: 3.4, 2a2: 29, r2: 0.466
Crux
Mean period: 468.03, Mean epoch: 2441386.8    LC  Avg  Per ΔP: 47.03 ±1.7 (t:27.7, r2:0.914), ΔEpoch: 528.8 ΔP/C: 0.97 ±0.054 (t:17.8, r2:0.817) Mag at max: 7.3 ±0.2 (6.9-8.0) GCVS period: 421, GCVS epoch: 2440858 GCVS spectral type: SC4.5/8-e-SC7/8-e E/P (X=15) ε2: 13589.5, 2a2: -27779.8, r2: 0.988 E/P (X=5) ε2: 7318.2, 2a2: -7511.3, r2: 0.966
Cygnus
Mean period: 426.86, Mean epoch: 2444582.4    LC  Avg  Per ΔP: 0.41 ±0.06 (t:6.9, r2:0.255), ΔEpoch: -12.6 ΔP/C: 0.02 ±0.003 (t:7.3, r2:0.278) Mag at max: 7.7 ±0.5 (6.7-9.3) GCVS period: 426.45, GCVS epoch: 2444595 GCVS spectral type: S2.5,9e-S6,9e(Tc) E/P (X=15) ε2: 55.4, 2a2: 114.2, r2: 0.949 E/P (X=5) ε2: 32.4, 2a2: 187.3, r2: 0.239	Mean period: 323.25, Mean epoch: 2444125.2    LC  Avg  Per ΔP: 0.32 ±0.03 (t:11.4, r2:0.424), ΔEpoch: 28.2 ΔP/C: 0.002 ±0.001 (t:1.7, r2:0.016) Mag at max: 10.2 ±0.4 (9.0-11.2) GCVS period: 322.93, GCVS epoch: 2444097 GCVS spectral type: S2.5,1e(M3.5-M7e) E/P (X=15) ε2: 45, 2a2: -14.1, r2: 0.995 E/P (X=5) ε2: 31.3, 2a2: 26.8, r2: 0.988	Mean period: 465.11, Mean epoch: 2444549.2    LC  Avg  Per ΔP: 1.87 ±0.11 (t:17.5, r2:0.725), ΔEpoch: -8.8 ΔP/C: 0.018 ±0.007 (t:2.7, r2:0.058) Mag at max: 7.6 ±0.5 (6.6-9.1) GCVS period: 463.24, GCVS epoch: 2444558 GCVS spectral type: C7,2e-C9,2(Npe) E/P (X=15) ε2: 212.5, 2a2: -250.9, r2: 0.995 E/P (X=5) ε2: 152.2, 2a2: -65.5, r2: 0.969
Mean period: 420.98, Mean epoch: 2443987.1    LC  Avg  Per ΔP: -0.29 ±0.08 (t:3.5, r2:0.094), ΔEpoch: -50.9 ΔP/C: -0.021 ±0.005 (t:4.5, r2:0.148) Mag at max: 9.3 ±0.7 (7.6-10.9) GCVS period: 421.27, GCVS epoch: 2444038 GCVS spectral type: C5,3e-C7,4e(Npe) E/P (X=15) ε2: 64.5, 2a2: 38.4, r2: 0.993 E/P (X=5) ε2: 60.6, 2a2: 44.5, r2: 0.972	Mean period: 263.86, Mean epoch: 2444611.1    LC  Avg  Per ΔP: 0.17 ±0.04 (t:4.3, r2:0.093), ΔEpoch: -6.9 ΔP/C: 0.003 ±0.002 (t:1.8, r2:0.017) Mag at max: 8.7 ±0.4 (7.7-10.0) GCVS period: 263.69, GCVS epoch: 2444618 GCVS spectral type: M5e-M9e E/P (X=15) ε2: 35, 2a2: -2.7, r2: 0.995 E/P (X=5) ε2: 31.1, 2a2: 13.6, r2: 0.994	Mean period: 190.26, Mean epoch: 2444585.6    LC  Avg  Per ΔP: -0.02 ±0.01 (t:2.3, r2:0.021), ΔEpoch: -2.4 ΔP/C: -0.003 ±0 (t:11.8, r2:0.361) Mag at max: 7.4 ±0.4 (6.4-8.7) GCVS period: 190.28, GCVS epoch: 2444588 GCVS spectral type: M2e-M8.8eIb E/P (X=15) ε2: 2.6, 2a2: 22.1, r2: 0.944 E/P (X=5) ε2: 0.4, 2a2: 28.3, r2: 0.181
Mean period: 337.49, Mean epoch: 2444428.2    LC  Avg  Per ΔP: 0.2 ±0.09 (t:2.1, r2:0.034), ΔEpoch: -47.8 ΔP/C: 0.001 ±0.005 (t:0.2, r2:0) Mag at max: 10.1 ±0.3 (8.8-10.8) GCVS period: 337.29, GCVS epoch: 2444476 GCVS spectral type: M5.5e-M8.0e E/P (X=15) ε2: 104, 2a2: -219.6, r2: 0.964 E/P (X=5) ε2: 49, 2a2: -12, r2: 0.987	Mean period: 411.23, Mean epoch: 2444090.8    LC  Avg  Per ΔP: 0.21 ±0.04 (t:5.9, r2:0.245), ΔEpoch: 10.8 ΔP/C: -0 ±0.002 (t:0.1, r2:0) Mag at max: 9.2 ±0.5 (8.1-10.4) GCVS period: 411.02, GCVS epoch: 2444080 GCVS spectral type: M7e E/P (X=15) ε2: 18.8, 2a2: 35.5, r2: 0.966 E/P (X=5) ε2: 26.1, 2a2: 7.7, r2: 0.983	Mean period: 219.57, Mean epoch: 2444761.8    LC  Avg  Per ΔP: 0.13 ±0.01 (t:9.6, r2:0.299), ΔEpoch: -3.2 ΔP/C: 0.003 ±0 (t:7.6, r2:0.211) Mag at max: 9.6 ±0.4 (8.9-10.9) GCVS period: 219.44, GCVS epoch: 2444765 GCVS spectral type: M3e-M6e E/P (X=15) ε2: 8.4, 2a2: 9.5, r2: 0.988 E/P (X=5) ε2: 5.1, 2a2: 20.3, r2: 0.988
Mean period: 342.50, Mean epoch: 2439199.6    LC  Avg  Per ΔP: 1.64 ±0.11 (t:15.2, r2:0.644), ΔEpoch: 63.6 ΔP/C: 0.049 ±0.005 (t:10.3, r2:0.458) Mag at max: 10.3 ±0.5 (8.9-12.2) GCVS period: 340.86, GCVS epoch: 2439136 GCVS spectral type: M6.5-M10ep E/P (X=15) ε2: 135.4, 2a2: -307, r2: 0.962 E/P (X=5) ε2: 65.1, 2a2: -40.7, r2: 0.977	Mean period: 350.53, Mean epoch: 2441948.1    LC  Avg  Per ΔP: 1.53 ±0.13 (t:11.6, r2:0.521), ΔEpoch: 73.1 ΔP/C: 0.052 ±0.006 (t:8, r2:0.342) Mag at max: 9.7 ±0.3 (8.6-10.6) GCVS period: 349, GCVS epoch: 2441875 GCVS spectral type: M6e-M8e E/P (X=15) ε2: 341, 2a2: -749, r2: 0.983 E/P (X=5) ε2: 177.8, 2a2: -182.9, r2: 0.959	Mean period: 567.07, Mean epoch: 2444443.1    LC  Avg  Per ΔP: 2.07 ±0.27 (t:7.6, r2:0.443), ΔEpoch: 22.1 ΔP/C: 0.188 ±0.014 (t:13.9, r2:0.731) Mag at max: 10.3 ±0.7 (8.2-11.7) GCVS period: 565, GCVS epoch: 2444421 GCVS spectral type: M4e-M6.5e E/P (X=15) ε2: 201.6, 2a2: -49, r2: 0.984 E/P (X=5) ε2: 206.9, 2a2: -127.8, r2: 0.994
Mean period: 409.32, Mean epoch: 2440461.3    LC  Avg  Per ΔP: -1.13 ±0.06 (t:17.7, r2:0.766), ΔEpoch: -18.7 ΔP/C: -0.028 ±0.004 (t:7.7, r2:0.383) Mag at max: 10.1 ±0.2 (9.0-10.5) GCVS period: 410.45, GCVS epoch: 2440480 GCVS spectral type: C8,2JLi(N3e) E/P (X=15) ε2: 17.3, 2a2: 108.3, r2: 0.915 E/P (X=5) ε2: 28.1, 2a2: 80.5, r2: 0.726	Mean period: 304.69, Mean epoch: 2444822.7    LC  Avg  Per ΔP: 0.15 ±0.04 (t:4.3, r2:0.127), ΔEpoch: -9.3 ΔP/C: 0.011 ±0.002 (t:6.5, r2:0.248) Mag at max: 9.3 ±0.3 (8.5-10.0) GCVS period: 304.54, GCVS epoch: 2444832 GCVS spectral type: M5e-M6e E/P (X=15) ε2: 42.8, 2a2: -62.6, r2: 0.984 E/P (X=5) ε2: 24.4, 2a2: 1, r2: 0.97	Mean period: 434.01, Mean epoch: 2442330.6    LC  Avg  Per ΔP: -1.3 ±0.09 (t:14.8, r2:0.736), ΔEpoch: 5.6 ΔP/C: -0.005 ±0.007 (t:0.7, r2:0.006) Mag at max: 10.2 ±0.6 (8.9-11.7) GCVS period: 435.31, GCVS epoch: 2442325 GCVS spectral type: M6e-M7e E/P (X=15) ε2: 89.8, 2a2: -101.5, r2: 0.959 E/P (X=5) ε2: 51.1, 2a2: 44.8, r2: 0.928
Mean period: 288.75, Mean epoch: 2443759.6    LC  Avg  Per ΔP: 0.75 ±0.09 (t:8.7, r2:0.341), ΔEpoch: -24.4 ΔP/C: -0.031 ±0.003 (t:8.8, r2:0.348) Mag at max: 9.9 ±0.2 (9.5-10.2) GCVS period: 288, GCVS epoch: 2443784 GCVS spectral type: M7e-M8e E/P (X=15) ε2: 121.4, 2a2: -178.5, r2: 0.982 E/P (X=5) ε2: 65.9, 2a2: 15.7, r2: 0.997	Mean period: 158.10, Mean epoch: 2433093.5    LC  Avg  Per ΔP: 0.23 ±0.01 (t:19.4, r2:0.664), ΔEpoch: -2.5 ΔP/C: -0.003 ±0 (t:13.8, r2:0.502) Mag at max: 10.5 ±0.3 (10.0-11.6) GCVS period: 157.87, GCVS epoch: 2433096 GCVS spectral type: M0 E/P (X=15) ε2: 8.2, 2a2: 10.8, r2: 0.972 E/P (X=5) ε2: 4, 2a2: 24.8, r2: 0.906	Mean period: 254.72, Mean epoch: 2444346.3    LC  Avg  Per ΔP: -0.11 ±0.03 (t:3.7, r2:0.111), ΔEpoch: -12.7 ΔP/C: 0.001 ±0.001 (t:0.4, r2:0.001) Mag at max: 10 ±0.3 (9.1-10.8) GCVS period: 254.83, GCVS epoch: 2444359 GCVS spectral type: SC2-S4e E/P (X=15) ε2: 36.1, 2a2: -50.1, r2: 0.949 E/P (X=5) ε2: 18, 2a2: 20.2, r2: 0.793
Mean period: 198.86, Mean epoch: 2444588.1    LC  Avg  Per ΔP: 0.33 ±0.02 (t:19.9, r2:0.748), ΔEpoch: 11.1 ΔP/C: 0.002 ±0.001 (t:2.9, r2:0.061) Mag at max: 9.1 ±0.4 (7.5-10.2) GCVS period: 198.53, GCVS epoch: 2444577 GCVS spectral type: M2-M7e(S) E/P (X=15) ε2: 3.9, 2a2: 21.7, r2: 0.914 E/P (X=5) ε2: 2.8, 2a2: 26.3, r2: 0.517	Mean period: 214.98, Mean epoch: 2437921.5    LC  Avg  Per ΔP: 1.38 ±0.09 (t:14.9, r2:0.624), ΔEpoch: -36.5 ΔP/C: -0.031 ±0.003 (t:12.1, r2:0.525) Mag at max: 10.6 ±0.2 (9.8-11.1) GCVS period: 213.6, GCVS epoch: 2437958 GCVS spectral type: M6e E/P (X=15) ε2: 79.3, 2a2: -144.4, r2: 0.969 E/P (X=5) ε2: 41.9, 2a2: -2.6, r2: 0.947	Mean period: 148.05, Mean epoch: 2444563.0    LC  Avg  Per ΔP: 0.45 ±0.01 (t:49.1, r2:0.921), ΔEpoch: -5 ΔP/C: -0.002 ±0 (t:12.6, r2:0.435) Mag at max: 10 ±0.2 (9.6-10.8) GCVS period: 147.6, GCVS epoch: 2444568 GCVS spectral type: M0e E/P (X=15) ε2: 4.5, 2a2: 34.9, r2: 0.938 E/P (X=5) ε2: 1.9, 2a2: 43.2, r2: 0.3
Mean period: 313.35, Mean epoch: 2439413.3    LC  Avg  Per ΔP: -0.53 ±0.05 (t:9.6, r2:0.452), ΔEpoch: -5.7 ΔP/C: -0.001 ±0.003 (t:0.2, r2:0) Mag at max: 9.2 ±0.4 (8.3-10.1) GCVS period: 313.88, GCVS epoch: 2439419 GCVS spectral type: M5e E/P (X=15) ε2: 42.9, 2a2: 3, r2: 0.989 E/P (X=5) ε2: 34.1, 2a2: 28.2, r2: 0.937	Mean period: 324.46, Mean epoch: 2444490.6    LC  Avg  Per ΔP: 0.64 ±0.06 (t:9.9, r2:0.538), ΔEpoch: 34.6 ΔP/C: 0.014 ±0.003 (t:5.2, r2:0.241) Mag at max: 9.6 ±0.2 (9.3-10.0) GCVS period: 323.82, GCVS epoch: 2444456 GCVS spectral type: S6,8e(M4e) E/P (X=15) ε2: 43.7, 2a2: -62.8, r2: 0.913 E/P (X=5) ε2: 13.2, 2a2: 59.3, r2: 0.58	Mean period: 369.06, Mean epoch: 2433355.0    LC  Avg  Per ΔP: -1.34 ±0.07 (t:18.3, r2:0.816), ΔEpoch: -48 ΔP/C: -0.01 ±0.006 (t:1.7, r2:0.036) Mag at max: 10.7 ±0.3 (9.9-11.2) GCVS period: 370.4, GCVS epoch: 2433403 GCVS spectral type: M7 E/P (X=15) ε2: 67.5, 2a2: 6.2, r2: 0.984 E/P (X=5) ε2: 66.4, 2a2: 1.4, r2: 0.978
Mean period: 480.46, Mean epoch: 2439534.8    LC  Avg  Per ΔP: 15.16 ±2.47 (t:6.1, r2:0.36), ΔEpoch: 639.8 ΔP/C: 1.692 ±0.075 (t:22.7, r2:0.886) Mag at max: 10.5 ±0.7 (9.6-12.0) GCVS period: 465.3, GCVS epoch: 2438895 GCVS spectral type: SC3e-S5,5e: E/P (X=15) ε2: 37926.7, 2a2: -102854.1, r2: 0.952 E/P (X=5) ε2: 15407.4, 2a2: -18034.9, r2: 0.944	Mean period: 104.73, Mean epoch: 2444825.7    LC  Avg  Per ΔP: -0.03 ±0.01 (t:5.2, r2:0.102), ΔEpoch: 26.7 ΔP/C: 0.001 ±0 (t:7.5, r2:0.188) Mag at max: 10.1 ±0.3 (9.6-10.8) GCVS period: 104.76, GCVS epoch: 2444799 GCVS spectral type: M4e E/P (X=15) ε2: 2.4, 2a2: 17.9, r2: 0.69 E/P (X=5) ε2: 1.1, 2a2: 23, r2: 0.232	Mean period: 372.18, Mean epoch: 2439684.8    LC  Avg  Per ΔP: 5.5 ±0.13 (t:41, r2:0.941), ΔEpoch: 34.8 ΔP/C: -0.045 ±0.006 (t:7, r2:0.322) Mag at max: 10 ±0.1 (9.9-10.2) GCVS period: 366.68, GCVS epoch: 2439650 GCVS spectral type: M7e E/P (X=15) ε2: 250, 2a2: -500.5, r2: 0.952 E/P (X=5) ε2: 118.6, 2a2: 17.2, r2: 0.972
Mean period: 298.76, Mean epoch: 2436821.3    LC  Avg  Per ΔP: 0.76 ±0.03 (t:21.7, r2:0.843), ΔEpoch: -8.7 ΔP/C: 0.003 ±0.002 (t:1.9, r2:0.039) Mag at max: 11 ±0.3 (10.3-11.5) GCVS period: 298, GCVS epoch: 2436830 GCVS spectral type: M4e E/P (X=15) ε2: 15.7, 2a2: 13.8, r2: 0.976 E/P (X=5) ε2: 11.7, 2a2: 27.2, r2: 0.912	Mean period: 407.26, Mean epoch: 2442114.4    LC  Avg  Per ΔP: -0.79 ±0.04 (t:18.7, r2:0.632), ΔEpoch: -25.6 ΔP/C: 0.013 ±0 (t:32.1, r2:0.835) Mag at max: 5 ±0.6 (3.9-7.2) GCVS period: 408.05, GCVS epoch: 2442140 GCVS spectral type: S6,2e-S10,4e(MSe) E/P (X=15) ε2: 46.5, 2a2: -12.8, r2: 0.993 E/P (X=5) ε2: 36.3, 2a2: 12.7, r2: 0.973