O-C diagram of Mira stars

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.


Constellations
And - CMi
Cap - Cyg
Del - Hyi
Ind - Ori
Pav - Vul

Andromeda
R And
Mean period: 409.74, Mean epoch: 2453811.9    LC  Avg  Per
ΔP: 0.54 ±0.05 (t:10, r2:0.425), ΔEpoch: -8.1
ΔP/C: 0.011 ±0.003 (t:4, r2:0.108)
Mag at max: 7.1 ±0.6 (6.1-8.6)
GCVS period: 409.2, GCVS epoch: 2453820
GCVS spectral type: S3,5e-S8,8e(M7e)
E/P (X=15) ε2: 66.7, 2a2: 15.4, r2: 0.989
E/P (X=5) ε2: 50.5, 2a2: 53.3, r2: 0.896

 T And
Mean period: 280.78, Mean epoch: 2450814.3    LC  Avg  Per
ΔP: -0.22 ±0.04 (t:6.1, r2:0.18), ΔEpoch: -39.7
ΔP/C: 0.002 ±0.001 (t:1.1, r2:0.007)
Mag at max: 8.6 ±0.3 (7.8-9.6)
GCVS period: 281, GCVS epoch: 2450854
GCVS spectral type: M4e-M7.5e
E/P (X=15) ε2: 59.5, 2a2: -89.4, r2: 0.989
E/P (X=5) ε2: 35.1, 2a2: -8.5, r2: 0.964

 U And
Mean period: 346.19, Mean epoch: 2449563.1    LC  Avg  Per
ΔP: -1.51 ±0.05 (t:33.2, r2:0.894), ΔEpoch: -0.9
ΔP/C: -0.011 ±0.002 (t:4.4, r2:0.13)
Mag at max: 10.1 ±0.3 (9.3-11.2)
GCVS period: 347.7, GCVS epoch: 2449564
GCVS spectral type: M6e
E/P (X=15) ε2: 45.6, 2a2: 8.2, r2: 0.992
E/P (X=5) ε2: 45.5, 2a2: 0.5, r2: 0.995
V And
Mean period: 257.91, Mean epoch: 2451540.9    LC  Avg  Per
ΔP: 1.51 ±0.02 (t:73.2, r2:0.969), ΔEpoch: 12.9
ΔP/C: 0.002 ±0.001 (t:2, r2:0.022)
Mag at max: 9.5 ±0.3 (8.3-10.1)
GCVS period: 256.4, GCVS epoch: 2451528
GCVS spectral type: M2e-M3e
E/P (X=15) ε2: 21.5, 2a2: 15.5, r2: 0.993
E/P (X=5) ε2: 17, 2a2: 26.2, r2: 0.981

 W And
Mean period: 396.08, Mean epoch: 2448679.1    LC  Avg  Per
ΔP: -1.22 ±0.06 (t:21.9, r2:0.808), ΔEpoch: 25.1
ΔP/C: -0.01 ±0.004 (t:2.8, r2:0.063)
Mag at max: 7.7 ±0.5 (6.5-9.2)
GCVS period: 397.3, GCVS epoch: 2448654
GCVS spectral type: S6,1e-S9,2e
E/P (X=15) ε2: 30.1, 2a2: 1.3, r2: 0.987
E/P (X=5) ε2: 22, 2a2: 29.4, r2: 0.983

 X And
Mean period: 345.80, Mean epoch: 2449641.5    LC  Avg  Per
ΔP: 2.4 ±0.03 (t:69.4, r2:0.975), ΔEpoch: 21.5
ΔP/C: -0.001 ±0.002 (t:0.6, r2:0.003)
Mag at max: 9.1 ±0.4 (8.2-11.5)
GCVS period: 343.4, GCVS epoch: 2449620
GCVS spectral type: S2,9e-S5,5e
E/P (X=15) ε2: 26.5, 2a2: 44.3, r2: 0.943
E/P (X=5) ε2: 25.6, 2a2: 32.6, r2: 0.894
Y And
Mean period: 220.89, Mean epoch: 2449502.7    LC  Avg  Per
ΔP: 0.39 ±0.02 (t:22.4, r2:0.717), ΔEpoch: 13.7
ΔP/C: 0.007 ±0 (t:16.6, r2:0.583)
Mag at max: 9.2 ±0.4 (8.4-10.4)
GCVS period: 220.5, GCVS epoch: 2449489
GCVS spectral type: M3e-M4.5e
E/P (X=15) ε2: 6.3, 2a2: 28.1, r2: 0.972
E/P (X=5) ε2: 7.8, 2a2: 22.5, r2: 0.993

 RR And
Mean period: 327.93, Mean epoch: 2449631.1    LC  Avg  Per
ΔP: -2.67 ±0.03 (t:84.2, r2:0.982), ΔEpoch: -12.9
ΔP/C: 0.004 ±0.002 (t:2, r2:0.03)
Mag at max: 9.1 ±0.4 (8.4-10.3)
GCVS period: 330.6, GCVS epoch: 2449644
GCVS spectral type: S6.5,2e
E/P (X=15) ε2: 11.5, 2a2: 41.8, r2: 0.988
E/P (X=5) ε2: 11.3, 2a2: 40.8, r2: 0.973

 RW And
Mean period: 430.00, Mean epoch: 2453384.6    LC  Avg  Per
ΔP: 0 ±0.06 (t:0.1, r2:0), ΔEpoch: 24.6
ΔP/C: -0.009 ±0.004 (t:2.1, r2:0.044)
Mag at max: 9 ±0.7 (7.9-11.2)
GCVS period: 430, GCVS epoch: 2453360
GCVS spectral type: M5e-M10e(S6,2e)
E/P (X=15) ε2: 37, 2a2: 34.7, r2: 0.992
E/P (X=5) ε2: 40.3, 2a2: 24.4, r2: 0.983
RY And
Mean period: 392.74, Mean epoch: 2453412.4    LC  Avg  Per
ΔP: 1.54 ±0.07 (t:21.9, r2:0.871), ΔEpoch: 12.4
ΔP/C: -0.027 ±0.003 (t:8.6, r2:0.515)
Mag at max: 10.7 ±0.4 (10.0-11.4)
GCVS period: 391.2, GCVS epoch: 2453400
GCVS spectral type: M8
E/P (X=15) ε2: 35.8, 2a2: 27.4, r2: 0.965
E/P (X=5) ε2: 37.7, 2a2: 38.2, r2: 0.995

 SV And
Mean period: 315.46, Mean epoch: 2453253.0    LC  Avg  Per
ΔP: 2.46 ±0.06 (t:41.8, r2:0.927), ΔEpoch: 33
ΔP/C: -0.024 ±0.002 (t:10.1, r2:0.428)
Mag at max: 8.8 ±0.4 (7.8-10.1)
GCVS period: 313, GCVS epoch: 2453220
GCVS spectral type: M5e-M7e
E/P (X=15) ε2: 46, 2a2: -48.3, r2: 0.989
E/P (X=5) ε2: 29.2, 2a2: 8.5, r2: 0.999

 SX And
Mean period: 333.05, Mean epoch: 2453199.3    LC  Avg  Per
ΔP: 0.25 ±0.05 (t:5.2, r2:0.207), ΔEpoch: -8.7
ΔP/C: -0.018 ±0.002 (t:8.1, r2:0.389)
Mag at max: 9.4 ±0.3 (8.9-10.5)
GCVS period: 332.8, GCVS epoch: 2453208
GCVS spectral type: M6.5e
E/P (X=15) ε2: 33.5, 2a2: 39.4, r2: 0.934
E/P (X=5) ε2: 42.7, 2a2: 13.9, r2: 0.993
SZ And
Mean period: 342.86, Mean epoch: 2453504.3    LC  Avg  Per
ΔP: -1.14 ±0.04 (t:25.6, r2:0.862), ΔEpoch: -15.7
ΔP/C: -0.018 ±0.002 (t:8.1, r2:0.387)
Mag at max: 10.6 ±0.4 (9.8-11.9)
GCVS period: 344, GCVS epoch: 2453520
GCVS spectral type: M2e
E/P (X=15) ε2: 16.8, 2a2: -3.4, r2: 0.983
E/P (X=5) ε2: 11, 2a2: 18.5, r2: 0.914

 TU And
Mean period: 317.12, Mean epoch: 2453664.6    LC  Avg  Per
ΔP: 0.32 ±0.07 (t:4.4, r2:0.141), ΔEpoch: -35.4
ΔP/C: 0.02 ±0.003 (t:5.9, r2:0.23)
Mag at max: 8.3 ±0.2 (7.8-8.9)
GCVS period: 316.8, GCVS epoch: 2453700
GCVS spectral type: M5e
E/P (X=15) ε2: 105, 2a2: -251.9, r2: 0.941
E/P (X=5) ε2: 41.4, 2a2: -5.9, r2: 0.974

 UW And
Mean period: 240.19, Mean epoch: 2454022.3    LC  Avg  Per
ΔP: 3.19 ±0.07 (t:45.6, r2:0.948), ΔEpoch: -1.7
ΔP/C: 0.002 ±0.003 (t:0.6, r2:0.003)
Mag at max: 10.4 ±0.3 (9.8-11.1)
GCVS period: 237, GCVS epoch: 2454024
GCVS spectral type: M5
E/P (X=15) ε2: 96.9, 2a2: -81.3, r2: 0.769
E/P (X=5) ε2: 58.7, 2a2: 36.6, r2: 0.834
UZ And
Mean period: 314.57, Mean epoch: 2454002.1    LC  Avg  Per
ΔP: -1.43 ±0.04 (t:32.5, r2:0.889), ΔEpoch: 12.1
ΔP/C: 0.018 ±0.002 (t:9.6, r2:0.416)
Mag at max: 10.3 ±0.4 (9.0-11.5)
GCVS period: 316, GCVS epoch: 2453990
GCVS spectral type: M7e
E/P (X=15) ε2: 25.5, 2a2: 7.5, r2: 0.995
E/P (X=5) ε2: 26.6, 2a2: 5.5, r2: 0.988

 YZ And
Mean period: 207.53, Mean epoch: 2454090.8    LC  Avg  Per
ΔP: 0.53 ±0.01 (t:42.2, r2:0.942), ΔEpoch: -1.2
ΔP/C: 0.001 ±0 (t:1.5, r2:0.021)
Mag at max: 10.4 ±0.4 (9.8-11.3)
GCVS period: 207, GCVS epoch: 2454092
GCVS spectral type: M5e
E/P (X=15) ε2: 6.2, 2a2: 9.2, r2: 0.969
E/P (X=5) ε2: 3.4, 2a2: 16.6, r2: 0.788

 AX And
Mean period: 379.53, Mean epoch: 2451978.8    LC  Avg  Per
ΔP: 1.53 ±0.11 (t:13.4, r2:0.71), ΔEpoch: -1.2
ΔP/C: 0.051 ±0.005 (t:10.1, r2:0.584)
Mag at max: 10.3 ±0.3 (9.7-11.1)
GCVS period: 378, GCVS epoch: 2451980
GCVS spectral type:
E/P (X=15) ε2: 64.8, 2a2: -133.4, r2: 0.936
E/P (X=5) ε2: 22.7, 2a2: 28.4, r2: 0.949
BG And
Mean period: 291.78, Mean epoch: 2454038.9    LC  Avg  Per
ΔP: 2.28 ±0.21 (t:10.7, r2:0.625), ΔEpoch: -6.1
ΔP/C: -0.104 ±0.008 (t:12.8, r2:0.708)
Mag at max: 9.5 ±0.3 (8.8-10.5)
GCVS period: 289.5, GCVS epoch: 2454045
GCVS spectral type: S6.5,5e
E/P (X=15) ε2: 81.5, 2a2: -58.5, r2: 0.978
E/P (X=5) ε2: 61.7, 2a2: 10.9, r2: 0.98

 BU And
Mean period: 383.06, Mean epoch: 2453634.7    LC  Avg  Per
ΔP: 5.06 ±0.1 (t:51.5, r2:0.971), ΔEpoch: 49.7
ΔP/C: -0.022 ±0.006 (t:3.6, r2:0.141)
Mag at max: 10 ±0.5 (9.2-11.1)
GCVS period: 378, GCVS epoch: 2453585
GCVS spectral type: M7e
E/P (X=15) ε2: 214.7, 2a2: -358.5, r2: 0.972
E/P (X=5) ε2: 123.1, 2a2: -60.2, r2: 0.994
Antlia
V Ant
Mean period: 302.19, Mean epoch: 2452778.9    LC  Avg  Per
ΔP: -0.81 ±0.04 (t:21.5, r2:0.86), ΔEpoch: 6.9
ΔP/C: 0.005 ±0.002 (t:2.6, r2:0.085)
Mag at max: 8.8 ±0.5 (7.9-10.1)
GCVS period: 303, GCVS epoch: 2452772
GCVS spectral type: M7IIIe
E/P (X=15) ε2: 25.5, 2a2: -16.7, r2: 0.919
E/P (X=5) ε2: 13, 2a2: 30.1, r2: 0.887

 X Ant
Mean period: 161.92, Mean epoch: 2453452.5    LC  Avg  Per
ΔP: -2.18 ±0.01 (t:146.3, r2:0.994), ΔEpoch: -5.5
ΔP/C: 0.004 ±0 (t:16, r2:0.675)
Mag at max: 9.2 ±0.3 (8.7-10.0)
GCVS period: 164.1, GCVS epoch: 2453458
GCVS spectral type: M2-M6e
E/P (X=15) ε2: 5.6, 2a2: 51.6, r2: 0.703
E/P (X=5) ε2: 0.6, 2a2: 67.6, r2: 0.014
Apus
T Aps
Mean period: 261.23, Mean epoch: 2441106.2    LC  Avg  Per
ΔP: 0.2 ±0.02 (t:10.9, r2:0.419), ΔEpoch: 10.2
ΔP/C: 0.004 ±0.001 (t:5.7, r2:0.168)
Mag at max: 9.1 ±0.4 (8.0-10.2)
GCVS period: 261.03, GCVS epoch: 2441096
GCVS spectral type: M3e
E/P (X=15) ε2: 10.3, 2a2: 14.6, r2: 0.993
E/P (X=5) ε2: 9.9, 2a2: 15.7, r2: 0.935
Aquarius
R Aqr
Mean period: 386.77, Mean epoch: 2454013.4    LC  Avg  Per
ΔP: -3.23 ±0.04 (t:77.2, r2:0.976), ΔEpoch: -31.6
ΔP/C: 0.005 ±0.001 (t:3.6, r2:0.082)
Mag at max: 7.1 ±0.7 (5.3-9.4)
GCVS period: 390, GCVS epoch: 2454045
GCVS spectral type: M5e-M8.5e+pec
E/P (X=15) ε2: 34.8, 2a2: 50.2, r2: 0.922
E/P (X=5) ε2: 39.3, 2a2: 11.5, r2: 0.989

 S Aqr
Mean period: 279.27, Mean epoch: 2452081.6    LC  Avg  Per
ΔP: -0.03 ±0.03 (t:1.2, r2:0.009), ΔEpoch: -25.4
ΔP/C: 0.002 ±0.001 (t:2.3, r2:0.031)
Mag at max: 8.5 ±0.4 (7.7-9.6)
GCVS period: 279.3, GCVS epoch: 2452107
GCVS spectral type: M4e-M6e
E/P (X=15) ε2: 13.8, 2a2: 5.6, r2: 0.99
E/P (X=5) ε2: 12.6, 2a2: 10.8, r2: 0.995

 T Aqr
Mean period: 201.89, Mean epoch: 2453247.4    LC  Avg  Per
ΔP: 0.79 ±0.01 (t:61.8, r2:0.939), ΔEpoch: 18.4
ΔP/C: -0.002 ±0 (t:5.7, r2:0.117)
Mag at max: 7.8 ±0.3 (7.0-8.9)
GCVS period: 201.1, GCVS epoch: 2453229
GCVS spectral type: M2e-M5.5e
E/P (X=15) ε2: 5.8, 2a2: 19.6, r2: 0.989
E/P (X=5) ε2: 4.7, 2a2: 23.1, r2: 0.942
W Aqr
Mean period: 380.59, Mean epoch: 2453953.2    LC  Avg  Per
ΔP: 4.49 ±0.07 (t:62.6, r2:0.97), ΔEpoch: 13.2
ΔP/C: 0.003 ±0.004 (t:0.7, r2:0.004)
Mag at max: 9.1 ±0.4 (8.0-10.4)
GCVS period: 376.1, GCVS epoch: 2453940
GCVS spectral type: M6-M8e
E/P (X=15) ε2: 97.3, 2a2: -109.8, r2: 0.994
E/P (X=5) ε2: 75.6, 2a2: -35, r2: 0.979

 X Aqr
Mean period: 311.64, Mean epoch: 2452948.4    LC  Avg  Per
ΔP: 0.24 ±0.04 (t:6, r2:0.209), ΔEpoch: -2.6
ΔP/C: 0.005 ±0.002 (t:2.5, r2:0.045)
Mag at max: 8.4 ±0.5 (7.5-9.6)
GCVS period: 311.4, GCVS epoch: 2452951
GCVS spectral type: S6,3e:(M4e-M6.5e)
E/P (X=15) ε2: 23.8, 2a2: 27.8, r2: 0.976
E/P (X=5) ε2: 21.1, 2a2: 41.6, r2: 0.921

 Y Aqr
Mean period: 381.70, Mean epoch: 2452261.4    LC  Avg  Per
ΔP: -0.64 ±0.04 (t:14.7, r2:0.648), ΔEpoch: 21.4
ΔP/C: 0.007 ±0.002 (t:2.6, r2:0.055)
Mag at max: 9.6 ±0.5 (8.6-11.2)
GCVS period: 382.34, GCVS epoch: 2452240
GCVS spectral type: M6.5e-M9
E/P (X=15) ε2: 38.1, 2a2: -4.1, r2: 0.986
E/P (X=5) ε2: 34.7, 2a2: -3.5, r2: 0.985
RR Aqr
Mean period: 182.45, Mean epoch: 2453963.1    LC  Avg  Per
ΔP: 0 ±0.01 (t:0.2, r2:0), ΔEpoch: 9.1
ΔP/C: 0 ±0 (t:0.3, r2:0)
Mag at max: 9.8 ±0.4 (9.0-11.4)
GCVS period: 182.45, GCVS epoch: 2453954
GCVS spectral type: M2e-M4e
E/P (X=15) ε2: 3.7, 2a2: 20.5, r2: 0.975
E/P (X=5) ε2: 4, 2a2: 20.2, r2: 0.962

 RS Aqr
Mean period: 215.94, Mean epoch: 2453902.0    LC  Avg  Per
ΔP: -5.36 ±0.07 (t:76.5, r2:0.968), ΔEpoch: -103
ΔP/C: 0.025 ±0.002 (t:14.4, r2:0.518)
Mag at max: 10.5 ±0.4 (9.1-11.5)
GCVS period: 221.3, GCVS epoch: 2454005
GCVS spectral type: M2e
E/P (X=15) ε2: 96.3, 2a2: -167.7, r2: 0.977
E/P (X=5) ε2: 53, 2a2: -7.6, r2: 0.993
Aquila
R Aql
Mean period: 298.82, Mean epoch: 2443129.6    LC  Avg  Per
ΔP: 14.62 ±0.8 (t:18.3, r2:0.65), ΔEpoch: -328.4
ΔP/C: -0.409 ±0.002 (t:178.1, r2:0.994)
Mag at max: 6.4 ±0.3 (5.2-7.3)
GCVS period: 284.2, GCVS epoch: 2443458
GCVS spectral type: M5e-M9IIIe
E/P (X=15) ε2: 4358.5, 2a2: -12120.6, r2: 0.945
E/P (X=5) ε2: 1720.6, 2a2: -1891.8, r2: 0.965

 W Aql
Mean period: 487.97, Mean epoch: 2439042.9    LC  Avg  Per
ΔP: -2.46 ±0.13 (t:19.6, r2:0.802), ΔEpoch: -73.1
ΔP/C: -0.052 ±0.007 (t:7.4, r2:0.369)
Mag at max: 8.7 ±0.8 (7.4-10.8)
GCVS period: 490.43, GCVS epoch: 2439116
GCVS spectral type: S3,9e-S6,9e
E/P (X=15) ε2: 122.5, 2a2: -14.2, r2: 0.972
E/P (X=5) ε2: 86.5, 2a2: 56.6, r2: 0.935

 X Aql
Mean period: 346.31, Mean epoch: 2441468.0    LC  Avg  Per
ΔP: -0.73 ±0.06 (t:11.9, r2:0.516), ΔEpoch: -19
ΔP/C: -0.03 ±0.002 (t:13.1, r2:0.565)
Mag at max: 9.1 ±0.5 (8.3-10.3)
GCVS period: 347.04, GCVS epoch: 2441487
GCVS spectral type: M6e
E/P (X=15) ε2: 52.6, 2a2: -46.9, r2: 0.993
E/P (X=5) ε2: 38.1, 2a2: -5.5, r2: 0.982
Z Aql
Mean period: 129.43, Mean epoch: 2441944.4    LC  Avg  Per
ΔP: 0.2 ±0.01 (t:21.7, r2:0.593), ΔEpoch: 6.4
ΔP/C: -0 ±0 (t:0.1, r2:0)
Mag at max: 9.6 ±0.4 (8.5-11.0)
GCVS period: 129.226, GCVS epoch: 2441938
GCVS spectral type: M3e
E/P (X=15) ε2: 7.9, 2a2: 4.5, r2: 0.986
E/P (X=5) ε2: 4.7, 2a2: 15, r2: 0.949

 RR Aql
Mean period: 395.52, Mean epoch: 2441779.1    LC  Avg  Per
ΔP: 0.74 ±0.07 (t:9.9, r2:0.464), ΔEpoch: 15.1
ΔP/C: 0.037 ±0.003 (t:11.1, r2:0.525)
Mag at max: 9.1 ±0.4 (7.8-10.3)
GCVS period: 394.78, GCVS epoch: 2441764
GCVS spectral type: M6e-M9
E/P (X=15) ε2: 58.3, 2a2: 40.1, r2: 0.996
E/P (X=5) ε2: 60.9, 2a2: 23.3, r2: 0.994

 RS Aql
Mean period: 410.24, Mean epoch: 2439247.2    LC  Avg  Per
ΔP: 0.12 ±0.18 (t:0.6, r2:0.004), ΔEpoch: 54.2
ΔP/C: 0.014 ±0.012 (t:1.1, r2:0.012)
Mag at max: 10.2 ±0.6 (9.0-12.8)
GCVS period: 410.12, GCVS epoch: 2439193
GCVS spectral type: M5e-M8
E/P (X=15) ε2: 537.2, 2a2: -931, r2: 0.989
E/P (X=5) ε2: 348.6, 2a2: -283.5, r2: 0.989
RT Aql
Mean period: 327.72, Mean epoch: 2443299.6    LC  Avg  Per
ΔP: 0.61 ±0.06 (t:10.7, r2:0.453), ΔEpoch: 9.6
ΔP/C: 0 ±0.003 (t:0, r2:0)
Mag at max: 8.5 ±0.4 (7.4-9.4)
GCVS period: 327.11, GCVS epoch: 2443290
GCVS spectral type: M6e-M9p(S)
E/P (X=15) ε2: 63.7, 2a2: -125.8, r2: 0.972
E/P (X=5) ε2: 30.7, 2a2: -4.7, r2: 0.988

 RU Aql
Mean period: 274.67, Mean epoch: 2439168.3    LC  Avg  Per
ΔP: 0.43 ±0.03 (t:14.5, r2:0.574), ΔEpoch: -2.7
ΔP/C: 0.009 ±0.001 (t:8, r2:0.292)
Mag at max: 9.5 ±0.4 (8.7-12.0)
GCVS period: 274.24, GCVS epoch: 2439171
GCVS spectral type: M5e
E/P (X=15) ε2: 27.6, 2a2: -17.2, r2: 0.994
E/P (X=5) ε2: 19.9, 2a2: 9.3, r2: 0.997

 RV Aql
Mean period: 218.57, Mean epoch: 2442620.4    LC  Avg  Per
ΔP: -0.03 ±0.01 (t:2.3, r2:0.027), ΔEpoch: 2.4
ΔP/C: -0.004 ±0 (t:10, r2:0.333)
Mag at max: 9.3 ±0.4 (8.1-11.0)
GCVS period: 218.6, GCVS epoch: 2442618
GCVS spectral type: M2e-M7:e
E/P (X=15) ε2: 6.3, 2a2: 25.5, r2: 0.971
E/P (X=5) ε2: 4.2, 2a2: 32, r2: 0.665
SV Aql
Mean period: 252.55, Mean epoch: 2439114.3    LC  Avg  Per
ΔP: -0.34 ±0.06 (t:6.2, r2:0.314), ΔEpoch: -55.7
ΔP/C: -0.002 ±0.003 (t:0.9, r2:0.01)
Mag at max: 11.1 ±0.4 (10.5-11.9)
GCVS period: 252.89, GCVS epoch: 2439170
GCVS spectral type: M8
E/P (X=15) ε2: 14.4, 2a2: 32.9, r2: 0.874
E/P (X=5) ε2: 16.7, 2a2: 30.8, r2: 0.727

 SY Aql
Mean period: 355.86, Mean epoch: 2442651.7    LC  Avg  Per
ΔP: -0.06 ±0.04 (t:1.7, r2:0.021), ΔEpoch: 0.7
ΔP/C: 0.009 ±0.002 (t:4.4, r2:0.135)
Mag at max: 9.9 ±0.6 (8.5-11.3)
GCVS period: 355.92, GCVS epoch: 2442651
GCVS spectral type: M5e-M7e
E/P (X=15) ε2: 18.7, 2a2: 72, r2: 0.956
E/P (X=5) ε2: 31.6, 2a2: 27.6, r2: 0.992

 TU Aql
Mean period: 270.26, Mean epoch: 2442948.5    LC  Avg  Per
ΔP: -0.13 ±0.06 (t:2.3, r2:0.05), ΔEpoch: 18.5
ΔP/C: 0.006 ±0.003 (t:2.2, r2:0.047)
Mag at max: 9.2 ±0.4 (8.0-10.3)
GCVS period: 270.39, GCVS epoch: 2442930
GCVS spectral type: M2e-M9
E/P (X=15) ε2: 80.6, 2a2: -153.9, r2: 0.944
E/P (X=5) ε2: 36.1, 2a2: 8.6, r2: 0.881
EU Aql
Mean period: 323.27, Mean epoch: 2427300.2    LC  Avg  Per
ΔP: 2.27 ±0.08 (t:27.4, r2:0.922), ΔEpoch: 1.2
ΔP/C: 0.016 ±0.005 (t:3.5, r2:0.159)
Mag at max: 11.7 ±0.3 (11.0-12.4)
GCVS period: 321, GCVS epoch: 2427299
GCVS spectral type: M9
E/P (X=15) ε2: 69.1, 2a2: -109.6, r2: 0.902
E/P (X=5) ε2: 33.6, 2a2: 23.5, r2: 0.953
Ara
U Ara
Mean period: 225.13, Mean epoch: 2451984.6    LC  Avg  Per
ΔP: 0.53 ±0.02 (t:30.6, r2:0.833), ΔEpoch: 3.6
ΔP/C: -0.001 ±0.001 (t:1.8, r2:0.017)
Mag at max: 8.6 ±0.5 (7.7-10.0)
GCVS period: 224.6, GCVS epoch: 2451981
GCVS spectral type: M3IIep
E/P (X=15) ε2: 11.6, 2a2: -1.6, r2: 0.986
E/P (X=5) ε2: 6.6, 2a2: 14.8, r2: 0.985
Aries
R Ari
Mean period: 186.82, Mean epoch: 2453649.7    LC  Avg  Per
ΔP: 1.15 ±0.01 (t:135.9, r2:0.985), ΔEpoch: 9.7
ΔP/C: 0.001 ±0 (t:3.8, r2:0.049)
Mag at max: 8.3 ±0.3 (7.5-9.7)
GCVS period: 185.67, GCVS epoch: 2453640
GCVS spectral type: M3e-M6e
E/P (X=15) ε2: 4, 2a2: 22.9, r2: 0.967
E/P (X=5) ε2: 2.9, 2a2: 27.3, r2: 0.745

 S Ari
Mean period: 292.50, Mean epoch: 2453698.3    LC  Avg  Per
ΔP: 1.5 ±0.03 (t:47.3, r2:0.936), ΔEpoch: -11.7
ΔP/C: 0.009 ±0.001 (t:10.4, r2:0.414)
Mag at max: 11 ±0.5 (9.8-12.0)
GCVS period: 291, GCVS epoch: 2453710
GCVS spectral type: M4e-M5e
E/P (X=15) ε2: 20.7, 2a2: -5, r2: 0.988
E/P (X=5) ε2: 15.2, 2a2: 14.4, r2: 0.98

 T Ari
Mean period: 320.55, Mean epoch: 2452535.8    LC  Avg  Per
ΔP: -19.45 ±0.09 (t:210.1, r2:0.997), ΔEpoch: -64.2
ΔP/C: 0.017 ±0.004 (t:4.5, r2:0.124)
Mag at max: 8.3 ±0.2 (7.5-8.9)
GCVS period: 340, GCVS epoch: 2452600
GCVS spectral type: M6e-M8e
E/P (X=15) ε2: 126.1, 2a2: 24, r2: 0.956
E/P (X=5) ε2: 148.8, 2a2: 16.4, r2: 0.991
U Ari
Mean period: 371.81, Mean epoch: 2453651.5    LC  Avg  Per
ΔP: 0.71 ±0.04 (t:16.4, r2:0.68), ΔEpoch: -6.5
ΔP/C: 0.018 ±0.002 (t:8.6, r2:0.369)
Mag at max: 8.3 ±0.6 (7.2-10.9)
GCVS period: 371.1, GCVS epoch: 2453658
GCVS spectral type: M4e-M7.5e
E/P (X=15) ε2: 28.5, 2a2: 21.2, r2: 0.987
E/P (X=5) ε2: 26.7, 2a2: 17.7, r2: 0.991
Auriga
R Aur
Mean period: 457.31, Mean epoch: 2444025.9    LC  Avg  Per
ΔP: -0.2 ±0.1 (t:1.9, r2:0.029), ΔEpoch: 21.9
ΔP/C: -0.017 ±0.006 (t:2.9, r2:0.064)
Mag at max: 7.7 ±0.4 (6.8-8.5)
GCVS period: 457.51, GCVS epoch: 2444004
GCVS spectral type: M6.5e-M9.5e
E/P (X=15) ε2: 214.3, 2a2: -322.9, r2: 0.996
E/P (X=5) ε2: 151.9, 2a2: -134.7, r2: 0.98

 U Aur
Mean period: 408.27, Mean epoch: 2443577.6    LC  Avg  Per
ΔP: 0.18 ±0.08 (t:2.2, r2:0.04), ΔEpoch: -1.4
ΔP/C: -0.016 ±0.005 (t:3.1, r2:0.078)
Mag at max: 8.6 ±0.4 (7.6-9.8)
GCVS period: 408.09, GCVS epoch: 2443579
GCVS spectral type: M7e-M9e
E/P (X=15) ε2: 143, 2a2: -182.5, r2: 0.987
E/P (X=5) ε2: 96.4, 2a2: -52.1, r2: 0.963

 V Aur
Mean period: 352.98, Mean epoch: 2443439.9    LC  Avg  Per
ΔP: -0.02 ±0.05 (t:0.3, r2:0.001), ΔEpoch: 4.9
ΔP/C: -0.003 ±0.003 (t:1.1, r2:0.009)
Mag at max: 9.4 ±0.3 (8.6-10.2)
GCVS period: 353, GCVS epoch: 2443435
GCVS spectral type: C6,2e(N3e)
E/P (X=15) ε2: 40.2, 2a2: 33.3, r2: 0.993
E/P (X=5) ε2: 38.9, 2a2: 36.3, r2: 0.981
W Aur
Mean period: 273.74, Mean epoch: 2443150.8    LC  Avg  Per
ΔP: -0.53 ±0.02 (t:23.2, r2:0.768), ΔEpoch: -14.2
ΔP/C: -0.007 ±0.001 (t:8.2, r2:0.297)
Mag at max: 9.3 ±0.4 (8.4-10.5)
GCVS period: 274.27, GCVS epoch: 2443165
GCVS spectral type: M3e-M8e
E/P (X=15) ε2: 10.6, 2a2: 15.4, r2: 0.986
E/P (X=5) ε2: 10.8, 2a2: 14.3, r2: 0.98

 X Aur
Mean period: 164.18, Mean epoch: 2444646.2    LC  Avg  Per
ΔP: 0.39 ±0.02 (t:20.1, r2:0.599), ΔEpoch: 42.2
ΔP/C: 0.004 ±0 (t:8.9, r2:0.229)
Mag at max: 8.5 ±0.2 (8.0-9.3)
GCVS period: 163.79, GCVS epoch: 2444604
GCVS spectral type: M3e-M7e
E/P (X=15) ε2: 21.1, 2a2: -32.1, r2: 0.973
E/P (X=5) ε2: 10.8, 2a2: 6.2, r2: 0.983

 RR Aur
Mean period: 308.79, Mean epoch: 2443071.4    LC  Avg  Per
ΔP: 0.92 ±0.05 (t:17.6, r2:0.758), ΔEpoch: 40.4
ΔP/C: 0.024 ±0.002 (t:14.9, r2:0.693)
Mag at max: 9.9 ±0.3 (9.0-10.6)
GCVS period: 307.87, GCVS epoch: 2443031
GCVS spectral type: M3e-M7e
E/P (X=15) ε2: 17.3, 2a2: 8.6, r2: 0.98
E/P (X=5) ε2: 15.9, 2a2: 10.4, r2: 0.974
RU Aur
Mean period: 468.79, Mean epoch: 2442597.9    LC  Avg  Per
ΔP: 2.32 ±0.16 (t:14.7, r2:0.722), ΔEpoch: 77.9
ΔP/C: 0.069 ±0.011 (t:6.2, r2:0.316)
Mag at max: 9.6 ±0.5 (8.6-11.3)
GCVS period: 466.47, GCVS epoch: 2442520
GCVS spectral type: M7e-M9e
E/P (X=15) ε2: 161.3, 2a2: -166.9, r2: 0.991
E/P (X=5) ε2: 114, 2a2: -17.4, r2: 0.997

 ST Aur
Mean period: 292.27, Mean epoch: 2438310.2    LC  Avg  Per
ΔP: 0.33 ±0.06 (t:5.5, r2:0.264), ΔEpoch: 8.2
ΔP/C: 0.02 ±0.003 (t:7.3, r2:0.392)
Mag at max: 11 ±0.3 (10.3-11.8)
GCVS period: 291.94, GCVS epoch: 2438302
GCVS spectral type:
E/P (X=15) ε2: 68.7, 2a2: -85.1, r2: 0.938
E/P (X=5) ε2: 37.5, 2a2: 24.2, r2: 0.991

 SZ Aur
Mean period: 455.52, Mean epoch: 2439069.5    LC  Avg  Per
ΔP: 1.48 ±0.09 (t:16, r2:0.78), ΔEpoch: 21.5
ΔP/C: 0.025 ±0.007 (t:3.6, r2:0.151)
Mag at max: 10.3 ±0.5 (9.3-11.7)
GCVS period: 454.04, GCVS epoch: 2439048
GCVS spectral type: M8e
E/P (X=15) ε2: 73.8, 2a2: 10.8, r2: 0.963
E/P (X=5) ε2: 74.7, 2a2: -18.1, r2: 0.92
UV Aur
Mean period: 394.04, Mean epoch: 2441063.2    LC  Avg  Per
ΔP: -0.38 ±0.08 (t:4.5, r2:0.241), ΔEpoch: 1.2
ΔP/C: -0.024 ±0.005 (t:4.5, r2:0.238)
Mag at max: 8.4 ±0.3 (7.9-9.5)
GCVS period: 394.42, GCVS epoch: 2441062
GCVS spectral type: C6,2-C8,2Jep(Ne)
E/P (X=15) ε2: 15.9, 2a2: 203.1, r2: 0.689
E/P (X=5) ε2: 21.4, 2a2: 176.8, r2: 0.444

 VX Aur
Mean period: 325.00, Mean epoch: 2438789.5    LC  Avg  Per
ΔP: 2.75 ±0.12 (t:23.6, r2:0.836), ΔEpoch: 116.5
ΔP/C: 0.035 ±0.006 (t:5.9, r2:0.247)
Mag at max: 8.7 ±0.2 (8.4-9.1)
GCVS period: 322.25, GCVS epoch: 2438673
GCVS spectral type: M5e
E/P (X=15) ε2: 291.8, 2a2: -616.5, r2: 0.974
E/P (X=5) ε2: 168, 2a2: -165.1, r2: 0.947

 VY Aur
Mean period: 399.99, Mean epoch: 2438056.6    LC  Avg  Per
ΔP: -2.11 ±0.13 (t:16.3, r2:0.801), ΔEpoch: -65.4
ΔP/C: 0.001 ±0.01 (t:0.1, r2:0)
Mag at max: 10.9 ±0.3 (10.3-11.7)
GCVS period: 402.1, GCVS epoch: 2438122
GCVS spectral type: M8e
E/P (X=15) ε2: 300.5, 2a2: -670.7, r2: 0.98
E/P (X=5) ε2: 137, 2a2: -126.3, r2: 0.948
AA Aur
Mean period: 267.10, Mean epoch: 2442938.2    LC  Avg  Per
ΔP: -3.07 ±0.09 (t:34.4, r2:0.918), ΔEpoch: 31.2
ΔP/C: -0.005 ±0.005 (t:1.2, r2:0.013)
Mag at max: 9.7 ±0.4 (9.1-10.5)
GCVS period: 270.17, GCVS epoch: 2442907
GCVS spectral type: M3e
E/P (X=15) ε2: 79.7, 2a2: -159.5, r2: 0.946
E/P (X=5) ε2: 42.8, 2a2: -16, r2: 0.955

 AZ Aur
Mean period: 415.63, Mean epoch: 2442869.7    LC  Avg  Per
ΔP: -0.29 ±0.09 (t:3.3, r2:0.136), ΔEpoch: 3.7
ΔP/C: -0.029 ±0.006 (t:5, r2:0.268)
Mag at max: 9.6 ±0.6 (8.6-10.7)
GCVS period: 415.92, GCVS epoch: 2442866
GCVS spectral type: C7,1e-C8,2-3(N0e)
E/P (X=15) ε2: 35.6, 2a2: 150.7, r2: 0.837
E/P (X=5) ε2: 58.9, 2a2: 75.8, r2: 0.995

 GQ Aur
Mean period: 305.03, Mean epoch: 2443927.5    LC  Avg  Per
ΔP: 0.28 ±0.04 (t:7.4, r2:0.357), ΔEpoch: 9.5
ΔP/C: 0.015 ±0.002 (t:9.6, r2:0.484)
Mag at max: 10.8 ±0.2 (10.4-11.3)
GCVS period: 304.75, GCVS epoch: 2443918
GCVS spectral type: M3
E/P (X=15) ε2: 16.7, 2a2: 20.1, r2: 0.915
E/P (X=5) ε2: 8.5, 2a2: 49.4, r2: 0.947
Bootes
R Boo
Mean period: 223.50, Mean epoch: 2444527.2    LC  Avg  Per
ΔP: 0.1 ±0.01 (t:11.7, r2:0.354), ΔEpoch: 9.2
ΔP/C: 0.002 ±0 (t:10.2, r2:0.295)
Mag at max: 7.2 ±0.3 (6.6-8.1)
GCVS period: 223.4, GCVS epoch: 2444518
GCVS spectral type: M3e-M8e
E/P (X=15) ε2: 6.9, 2a2: 6.1, r2: 0.984
E/P (X=5) ε2: 4.4, 2a2: 15.1, r2: 0.94

 S Boo
Mean period: 271.07, Mean epoch: 2444149.2    LC  Avg  Per
ΔP: 0.34 ±0.04 (t:9.1, r2:0.28), ΔEpoch: 33.2
ΔP/C: 0.01 ±0.001 (t:8.4, r2:0.252)
Mag at max: 8.4 ±0.2 (7.9-9.1)
GCVS period: 270.73, GCVS epoch: 2444116
GCVS spectral type: M3e-M6e
E/P (X=15) ε2: 69, 2a2: -129.8, r2: 0.972
E/P (X=5) ε2: 36.8, 2a2: -6.9, r2: 0.997

 Z Boo
Mean period: 280.95, Mean epoch: 2441081.0    LC  Avg  Per
ΔP: -0.19 ±0.03 (t:7.5, r2:0.277), ΔEpoch: -15
ΔP/C: -0.001 ±0.001 (t:0.7, r2:0.004)
Mag at max: 9.4 ±0.4 (8.4-10.6)
GCVS period: 281.14, GCVS epoch: 2441096
GCVS spectral type: M5e-M6e
E/P (X=15) ε2: 11.8, 2a2: 11.7, r2: 0.985
E/P (X=5) ε2: 12.1, 2a2: 10.5, r2: 0.975
RR Boo
Mean period: 194.75, Mean epoch: 2443042.5    LC  Avg  Per
ΔP: 0.05 ±0.01 (t:4, r2:0.073), ΔEpoch: -4.5
ΔP/C: 0.002 ±0 (t:4.5, r2:0.094)
Mag at max: 9.4 ±0.3 (8.8-10.3)
GCVS period: 194.7, GCVS epoch: 2443047
GCVS spectral type: M2e-M6e
E/P (X=15) ε2: 4, 2a2: 17.1, r2: 0.935
E/P (X=5) ε2: 1.4, 2a2: 26.1, r2: 0.473

 RT Boo
Mean period: 272.67, Mean epoch: 2442652.6    LC  Avg  Per
ΔP: -1.19 ±0.08 (t:14.6, r2:0.609), ΔEpoch: -69.4
ΔP/C: -0.032 ±0.003 (t:10.6, r2:0.453)
Mag at max: 10 ±0.3 (9.2-10.4)
GCVS period: 273.86, GCVS epoch: 2442722
GCVS spectral type: M6.5e-M8e
E/P (X=15) ε2: 107.8, 2a2: -160.2, r2: 0.984
E/P (X=5) ε2: 63.4, 2a2: -4.1, r2: 0.972
Caelum
R Cae
Mean period: 391.99, Mean epoch: 2440710.0    LC  Avg  Per
ΔP: 1.04 ±0.08 (t:12.9, r2:0.59), ΔEpoch: 65
ΔP/C: 0.023 ±0.004 (t:5.1, r2:0.186)
Mag at max: 8.3 ±0.5 (7.2-9.3)
GCVS period: 390.95, GCVS epoch: 2440645
GCVS spectral type: M6e-M9e
E/P (X=15) ε2: 67.3, 2a2: -123.6, r2: 0.971
E/P (X=5) ε2: 32.5, 2a2: 4.3, r2: 0.959
Camelopardalis
R Cam
Mean period: 270.29, Mean epoch: 2443963.6    LC  Avg  Per
ΔP: 0.07 ±0.04 (t:1.9, r2:0.016), ΔEpoch: -14.4
ΔP/C: -0.006 ±0.001 (t:4.6, r2:0.09)
Mag at max: 8.4 ±0.2 (8.0-9.2)
GCVS period: 270.22, GCVS epoch: 2443978
GCVS spectral type: S2,8e-S8,7e
E/P (X=15) ε2: 73.5, 2a2: -91.1, r2: 0.989
E/P (X=5) ε2: 47.8, 2a2: 1.3, r2: 0.993

 T Cam
Mean period: 373.92, Mean epoch: 2443457.5    LC  Avg  Per
ΔP: 0.72 ±0.09 (t:8.4, r2:0.363), ΔEpoch: 24.5
ΔP/C: -0.012 ±0.005 (t:2.3, r2:0.041)
Mag at max: 8.2 ±0.1 (7.8-8.6)
GCVS period: 373.2, GCVS epoch: 2443433
GCVS spectral type: S4,7e-S8.5,8e
E/P (X=15) ε2: 103, 2a2: -159, r2: 0.98
E/P (X=5) ε2: 64.4, 2a2: -12.3, r2: 0.997

 V Cam
Mean period: 522.61, Mean epoch: 2443384.8    LC  Avg  Per
ΔP: 0.16 ±0.12 (t:1.3, r2:0.02), ΔEpoch: -17.2
ΔP/C: -0.025 ±0.011 (t:2.4, r2:0.063)
Mag at max: 9.5 ±0.6 (8.3-10.7)
GCVS period: 522.45, GCVS epoch: 2443402
GCVS spectral type: M7e
E/P (X=15) ε2: 75.2, 2a2: -37.1, r2: 0.99
E/P (X=5) ε2: 65.7, 2a2: -21.2, r2: 0.989
W Cam
Mean period: 284.34, Mean epoch: 2435165.0    LC  Avg  Per
ΔP: 0.74 ±0.11 (t:6.7, r2:0.302), ΔEpoch: -48
ΔP/C: -0.056 ±0.002 (t:25.2, r2:0.862)
Mag at max: 10.3 ±0.3 (9.7-11.0)
GCVS period: 283.6, GCVS epoch: 2435213
GCVS spectral type: M7
E/P (X=15) ε2: 121.1, 2a2: -342.4, r2: 0.857
E/P (X=5) ε2: 42.3, 2a2: -25.1, r2: 0.873

 X Cam
Mean period: 143.70, Mean epoch: 2444669.8    LC  Avg  Per
ΔP: 0.14 ±0.01 (t:15.8, r2:0.447), ΔEpoch: -9.2
ΔP/C: 0 ±0 (t:0, r2:0)
Mag at max: 8.2 ±0.4 (7.5-9.5)
GCVS period: 143.56, GCVS epoch: 2444679
GCVS spectral type: K8-M8e
E/P (X=15) ε2: 4, 2a2: 7.8, r2: 0.969
E/P (X=5) ε2: 1.8, 2a2: 15.8, r2: 0.728

 RT Cam
Mean period: 365.65, Mean epoch: 2443798.2    LC  Avg  Per
ΔP: -0.66 ±0.05 (t:12.9, r2:0.609), ΔEpoch: -38.8
ΔP/C: -0.012 ±0.003 (t:3.8, r2:0.122)
Mag at max: 9.8 ±0.2 (9.3-10.4)
GCVS period: 366.31, GCVS epoch: 2443837
GCVS spectral type: M6e
E/P (X=15) ε2: 26.3, 2a2: 60.4, r2: 0.94
E/P (X=5) ε2: 39.1, 2a2: 8.5, r2: 0.968
SU Cam
Mean period: 285.17, Mean epoch: 2444273.1    LC  Avg  Per
ΔP: 0.14 ±0.03 (t:4.8, r2:0.151), ΔEpoch: 8.1
ΔP/C: 0.006 ±0.001 (t:4, r2:0.113)
Mag at max: 9.8 ±0.3 (9.0-10.5)
GCVS period: 285.03, GCVS epoch: 2444265
GCVS spectral type: M5
E/P (X=15) ε2: 21.2, 2a2: 0.1, r2: 0.994
E/P (X=5) ε2: 17.8, 2a2: 12.7, r2: 0.99

 SW Cam
Mean period: 254.76, Mean epoch: 2443403.1    LC  Avg  Per
ΔP: 1.96 ±0.03 (t:60.7, r2:0.97), ΔEpoch: -15.9
ΔP/C: 0.005 ±0.001 (t:3.3, r2:0.087)
Mag at max: 10.4 ±0.2 (9.7-10.9)
GCVS period: 252.8, GCVS epoch: 2443419
GCVS spectral type: M5e
E/P (X=15) ε2: 28.7, 2a2: -24.3, r2: 0.986
E/P (X=5) ε2: 16.9, 2a2: 15.8, r2: 0.988

 UZ Cam
Mean period: 232.35, Mean epoch: 2443836.3    LC  Avg  Per
ΔP: 6.71 ±0.07 (t:102.3, r2:0.987), ΔEpoch: 63.3
ΔP/C: 0.009 ±0.002 (t:4.3, r2:0.117)
Mag at max: 10.8 ±0.2 (10.4-11.3)
GCVS period: 225.64, GCVS epoch: 2443773
GCVS spectral type: M3
E/P (X=15) ε2: 106.2, 2a2: -222.4, r2: 0.937
E/P (X=5) ε2: 58.2, 2a2: -14.3, r2: 0.986
Cancer
R Cnc
Mean period: 361.88, Mean epoch: 2444226.2    LC  Avg  Per
ΔP: 0.28 ±0.06 (t:4.6, r2:0.124), ΔEpoch: -4.8
ΔP/C: 0.001 ±0.003 (t:0.5, r2:0.002)
Mag at max: 6.9 ±0.3 (6.1-7.9)
GCVS period: 361.6, GCVS epoch: 2444231
GCVS spectral type: M6e-M9e
E/P (X=15) ε2: 130.9, 2a2: -252.4, r2: 0.977
E/P (X=5) ε2: 73.7, 2a2: -37.4, r2: 0.971

 U Cnc
Mean period: 305.01, Mean epoch: 2440650.8    LC  Avg  Per
ΔP: 0.23 ±0.02 (t:9.5, r2:0.342), ΔEpoch: 23.8
ΔP/C: 0.008 ±0.001 (t:11.2, r2:0.421)
Mag at max: 10.1 ±0.7 (8.9-12.1)
GCVS period: 304.78, GCVS epoch: 2440627
GCVS spectral type: M2e
E/P (X=15) ε2: 17, 2a2: 73.5, r2: 0.96
E/P (X=5) ε2: 18.1, 2a2: 66.6, r2: 0.87

 V Cnc
Mean period: 272.13, Mean epoch: 2443488.6    LC  Avg  Per
ΔP: 0 ±0.01 (t:0.1, r2:0), ΔEpoch: 3.6
ΔP/C: 0 ±0.001 (t:0.4, r2:0.001)
Mag at max: 8 ±0.3 (7.4-8.7)
GCVS period: 272.13, GCVS epoch: 2443485
GCVS spectral type: S0e-S7,9e
E/P (X=15) ε2: 6.2, 2a2: 42.5, r2: 0.971
E/P (X=5) ε2: 7.2, 2a2: 38, r2: 0.972
W Cnc
Mean period: 393.36, Mean epoch: 2443872.8    LC  Avg  Per
ΔP: 0.14 ±0.08 (t:1.9, r2:0.028), ΔEpoch: -23.2
ΔP/C: -0.027 ±0.004 (t:6.4, r2:0.258)
Mag at max: 8.1 ±0.4 (7.0-9.2)
GCVS period: 393.22, GCVS epoch: 2443896
GCVS spectral type: M6.5e-M9e
E/P (X=15) ε2: 62.8, 2a2: -20.6, r2: 0.989
E/P (X=5) ε2: 57, 2a2: -13, r2: 0.987

 RR Cnc
Mean period: 298.32, Mean epoch: 2441398.3    LC  Avg  Per
ΔP: 0.06 ±0.05 (t:1.2, r2:0.015), ΔEpoch: -1.7
ΔP/C: -0.014 ±0.002 (t:6.9, r2:0.335)
Mag at max: 9.7 ±0.4 (9.1-10.7)
GCVS period: 298.26, GCVS epoch: 2441400
GCVS spectral type: M3e
E/P (X=15) ε2: 37.1, 2a2: -37.8, r2: 0.977
E/P (X=5) ε2: 19.6, 2a2: 18.5, r2: 0.9
Canes Venatici
R CVn
Mean period: 328.60, Mean epoch: 2443574.7    LC  Avg  Per
ΔP: 0.07 ±0.06 (t:1.1, r2:0.008), ΔEpoch: -11.3
ΔP/C: 0.018 ±0.003 (t:6.2, r2:0.207)
Mag at max: 7.6 ±0.3 (7.0-8.2)
GCVS period: 328.53, GCVS epoch: 2443586
GCVS spectral type: M6e-M9e
E/P (X=15) ε2: 71.1, 2a2: -108, r2: 0.977
E/P (X=5) ε2: 46.2, 2a2: -8.5, r2: 0.992

 T CVn
Mean period: 290.35, Mean epoch: 2442758.3    LC  Avg  Per
ΔP: 0.26 ±0.07 (t:3.6, r2:0.08), ΔEpoch: -25.7
ΔP/C: 0.027 ±0.003 (t:9.6, r2:0.381)
Mag at max: 9.6 ±0.3 (8.6-10.2)
GCVS period: 290.09, GCVS epoch: 2442784
GCVS spectral type: M6.5e
E/P (X=15) ε2: 67.4, 2a2: 225.4, r2: 0.943
E/P (X=5) ε2: 92.8, 2a2: 113.4, r2: 0.952

 U CVn
Mean period: 345.48, Mean epoch: 2442458.0    LC  Avg  Per
ΔP: -0.17 ±0.07 (t:2.3, r2:0.054), ΔEpoch: -33
ΔP/C: -0.015 ±0.004 (t:3.5, r2:0.114)
Mag at max: 9.8 ±0.4 (8.8-10.9)
GCVS period: 345.65, GCVS epoch: 2442491
GCVS spectral type: M7e
E/P (X=15) ε2: 130, 2a2: -247, r2: 0.984
E/P (X=5) ε2: 62.9, 2a2: -40.2, r2: 0.926
RT CVn
Mean period: 253.81, Mean epoch: 2434406.6    LC  Avg  Per
ΔP: 0.21 ±0.02 (t:10.1, r2:0.489), ΔEpoch: 6.6
ΔP/C: -0.001 ±0.001 (t:1.3, r2:0.017)
Mag at max: 10.5 ±0.3 (9.8-11.3)
GCVS period: 253.6, GCVS epoch: 2434400
GCVS spectral type: M5e
E/P (X=15) ε2: 7.9, 2a2: 13.3, r2: 0.882
E/P (X=5) ε2: 4.5, 2a2: 26.5, r2: 0.602
Canis Minor
R CMi
Mean period: 337.70, Mean epoch: 2441317.8    LC  Avg  Per
ΔP: -0.08 ±0.04 (t:2.1, r2:0.028), ΔEpoch: -5.2
ΔP/C: -0.011 ±0.001 (t:7.8, r2:0.28)
Mag at max: 8 ±0.2 (6.8-8.4)
GCVS period: 337.78, GCVS epoch: 2441323
GCVS spectral type: C0ev
E/P (X=15) ε2: 38, 2a2: 23, r2: 0.991
E/P (X=5) ε2: 34.3, 2a2: 29.4, r2: 0.977

 S CMi
Mean period: 333.07, Mean epoch: 2443877.0    LC  Avg  Per
ΔP: 0.13 ±0.04 (t:3, r2:0.053), ΔEpoch: -34
ΔP/C: 0.007 ±0.002 (t:3.8, r2:0.085)
Mag at max: 7.5 ±0.3 (7.0-8.4)
GCVS period: 332.94, GCVS epoch: 2443911
GCVS spectral type: M6e-M8e
E/P (X=15) ε2: 63.4, 2a2: -85.1, r2: 0.987
E/P (X=5) ε2: 39.9, 2a2: -2.4, r2: 0.982

 T CMi
Mean period: 320.50, Mean epoch: 2441946.7    LC  Avg  Per
ΔP: -7.8 ±0.13 (t:61.2, r2:0.963), ΔEpoch: -98.3
ΔP/C: 0.023 ±0.005 (t:4.5, r2:0.127)
Mag at max: 10.2 ±0.4 (9.2-11.4)
GCVS period: 328.3, GCVS epoch: 2442045
GCVS spectral type: M4Se-M8
E/P (X=15) ε2: 456.9, 2a2: -1025.3, r2: 0.976
E/P (X=5) ε2: 227.3, 2a2: -196, r2: 0.968
U CMi
Mean period: 411.50, Mean epoch: 2443146.2    LC  Avg  Per
ΔP: -2.38 ±0.15 (t:16.1, r2:0.696), ΔEpoch: -3.8
ΔP/C: 0.046 ±0.008 (t:5.9, r2:0.24)
Mag at max: 8.8 ±0.3 (8.2-9.6)
GCVS period: 413.88, GCVS epoch: 2443150
GCVS spectral type: M4e
E/P (X=15) ε2: 308.8, 2a2: -414, r2: 0.995
E/P (X=5) ε2: 228.2, 2a2: -160.1, r2: 0.987

 V CMi
Mean period: 366.30, Mean epoch: 2442752.4    LC  Avg  Per
ΔP: 0.2 ±0.04 (t:5.6, r2:0.208), ΔEpoch: 15.4
ΔP/C: 0.007 ±0.002 (t:3.2, r2:0.077)
Mag at max: 8.7 ±0.6 (7.7-10.4)
GCVS period: 366.1, GCVS epoch: 2442737
GCVS spectral type: M4e-M10
E/P (X=15) ε2: 19.2, 2a2: 63.6, r2: 0.969
E/P (X=5) ε2: 20.2, 2a2: 50.8, r2: 0.951