Period length over time for Mira stars

These period diagrams is based on the O-C diagrams at http://var.saaf.se/mirainfooc.php and calculated with data from AAVSO, AFOEV, VSOLJ, BAAVSS, ASAS-SN and DASCH and various published maxima.
The diagrams shows the development over time of the stars mean period. For each maximum the local mean period is calculated as a linear regression slope from five maxima before and five maxima after the current maxima.
For the first and last four maxima, where there are no five maxima before or after, only available maxima are used (0 to 4 before, or 0 to 4 after).

Each diagram is also clickable to get a table with the underlying data.

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

Pavo
R Pav
Mean period: 230.41, Mean epoch: 2442042.4
GCVS period: 229.46, GCVS epoch: 2442009
GCVS spectral type: M3e-M5(II)e


 T Pav
Mean period: 243.84, Mean epoch: 2439415.8
GCVS period: 243.62, GCVS epoch: 2439429
GCVS spectral type: M4e


 W Pav
Mean period: 283.08, Mean epoch: 2440392.2
GCVS period: 283.35, GCVS epoch: 2440420
GCVS spectral type: M4e-M7e
Pegasus
R Peg
Mean period: 377.29, Mean epoch: 2442407.1
GCVS period: 378.1, GCVS epoch: 2442444
GCVS spectral type: M6e-M9e


 S Peg
Mean period: 319.46, Mean epoch: 2445282.3
GCVS period: 319.22, GCVS epoch: 2445311
GCVS spectral type: M5e-M8.5e


 T Peg
Mean period: 373.75, Mean epoch: 2445164.7
GCVS period: 379.4, GCVS epoch: 2445159
GCVS spectral type: M6e-M8e
V Peg
Mean period: 302.86, Mean epoch: 2444531.3
GCVS period: 302.35, GCVS epoch: 2444506
GCVS spectral type: M3e-M7e


 W Peg
Mean period: 345.32, Mean epoch: 2444843.8
GCVS period: 345.5, GCVS epoch: 2444873
GCVS spectral type: M6e-M8e


 X Peg
Mean period: 200.95, Mean epoch: 2445254.1
GCVS period: 201.2, GCVS epoch: 2445244
GCVS spectral type: M2e-M5e
Y Peg
Mean period: 207.04, Mean epoch: 2443045.2
GCVS period: 206.93, GCVS epoch: 2443038
GCVS spectral type: M3e-M5e


 Z Peg
Mean period: 326.72, Mean epoch: 2445084.3
GCVS period: 334.8, GCVS epoch: 2445090
GCVS spectral type: M6e-M8.5e(Tc)


 RR Peg
Mean period: 264.31, Mean epoch: 2445309.0
GCVS period: 264.05, GCVS epoch: 2445290
GCVS spectral type: M4e-M8e
RS Peg
Mean period: 413.57, Mean epoch: 2445209.0
GCVS period: 415.4, GCVS epoch: 2445161
GCVS spectral type: M6e-M9e


 RT Peg
Mean period: 215.20, Mean epoch: 2445577.6
GCVS period: 215, GCVS epoch: 2445599
GCVS spectral type: M3e-M6e


 RV Peg
Mean period: 390.07, Mean epoch: 2442024.9
GCVS period: 396.8, GCVS epoch: 2442049
GCVS spectral type: M6e
RW Peg
Mean period: 208.68, Mean epoch: 2445483.8
GCVS period: 208.43, GCVS epoch: 2445457
GCVS spectral type: K3e-M6.5e


 RZ Peg
Mean period: 437.49, Mean epoch: 2445219.2
GCVS period: 438.7, GCVS epoch: 2445248
GCVS spectral type: C9,1e(Ne)(Tc)/CSe


 SS Peg
Mean period: 416.93, Mean epoch: 2445166.4
GCVS period: 424.8, GCVS epoch: 2445177
GCVS spectral type: M6e-M7e
SX Peg
Mean period: 306.34, Mean epoch: 2445222.3
GCVS period: 303.6, GCVS epoch: 2445186
GCVS spectral type: S3,9e-S4.5,9e


 TU Peg
Mean period: 321.81, Mean epoch: 2445149.8
GCVS period: 321.6, GCVS epoch: 2445137
GCVS spectral type: M7e-M8e


 AN Peg
Mean period: 275.36, Mean epoch: 2442598.2
GCVS period: 280.07, GCVS epoch: 2442667
GCVS spectral type: M5
DG Peg
Mean period: 147.16, Mean epoch: 2440411.2
GCVS period: 146.6, GCVS epoch: 2440449
GCVS spectral type: M4e


 DL Peg
Mean period: 180.53, Mean epoch: 2442803.9
GCVS period: 180.4, GCVS epoch: 2442759
GCVS spectral type: M0
Perseus
R Per
Mean period: 210.01, Mean epoch: 2445359.0
GCVS period: 209.89, GCVS epoch: 2445339
GCVS spectral type: M2e-M5e


 U Per
Mean period: 321.24, Mean epoch: 2445029.6
GCVS period: 320.26, GCVS epoch: 2445066
GCVS spectral type: M5e-M7e


 RR Per
Mean period: 390.56, Mean epoch: 2444967.1
GCVS period: 389.62, GCVS epoch: 2444944
GCVS spectral type: M6e-M7e
RZ Per
Mean period: 354.49, Mean epoch: 2445489.6
GCVS period: 355.25, GCVS epoch: 2445498
GCVS spectral type: S4,9e


 AI Per
Mean period: 226.30, Mean epoch: 2438638.2
GCVS period: 231, GCVS epoch: 2438642
GCVS spectral type: Me
Phoenix
R Phe
Mean period: 268.30, Mean epoch: 2439474.7
GCVS period: 269.26, GCVS epoch: 2439486
GCVS spectral type: M2(II)e-M4(III)e


 T Phe
Mean period: 281.98, Mean epoch: 2441092.2
GCVS period: 281.79, GCVS epoch: 2441070
GCVS spectral type: M5e


 V Phe
Mean period: 257.62, Mean epoch: 2440847.9
GCVS period: 257, GCVS epoch: 2440817
GCVS spectral type: M4e
W Phe
Mean period: 331.57, Mean epoch: 2441461.2
GCVS period: 333.95, GCVS epoch: 2441455
GCVS spectral type: M5e-M6e


 RS Phe
Mean period: 251.40, Mean epoch: 2424824.7
GCVS period: 239, GCVS epoch: 2424802
GCVS spectral type: M2e
Pictor
S Pic
Mean period: 424.76, Mean epoch: 2439525.2
GCVS period: 428, GCVS epoch: 2439595
GCVS spectral type: M6.5e-M8III-IIe


 T Pic
Mean period: 200.97, Mean epoch: 2441305.2
GCVS period: 200.58, GCVS epoch: 2441283
GCVS spectral type: M6IIIe
Pisces
R Psc
Mean period: 344.28, Mean epoch: 2444914.5
GCVS period: 344.5, GCVS epoch: 2444920
GCVS spectral type: M3e-M6e


 S Psc
Mean period: 406.25, Mean epoch: 2442379.9
GCVS period: 404.62, GCVS epoch: 2442325
GCVS spectral type: M5e-M7e


 U Psc
Mean period: 173.37, Mean epoch: 2443426.1
GCVS period: 173.1, GCVS epoch: 2443432
GCVS spectral type: M4e
W Psc
Mean period: 188.45, Mean epoch: 2445332.0
GCVS period: 188.1, GCVS epoch: 2445337
GCVS spectral type: M2e-M4


 X Psc
Mean period: 353.28, Mean epoch: 2442296.9
GCVS period: 349.6, GCVS epoch: 2442314
GCVS spectral type: M5e-M6e
Piscis Austrinus
R PsA
Mean period: 292.81, Mean epoch: 2440803.0
GCVS period: 297.6, GCVS epoch: 2440820
GCVS spectral type: M3(II)e-M5IIe


 S PsA
Mean period: 272.12, Mean epoch: 2440716.5
GCVS period: 271.7, GCVS epoch: 2440696
GCVS spectral type: M3e-M5IIe


 ST PsA
Mean period: 180.84, Mean epoch: 2436004.0
GCVS period: 179, GCVS epoch: 2436006
GCVS spectral type: Me
Puppis
U Pup
Mean period: 316.68, Mean epoch: 2438837.7
GCVS period: 318.44, GCVS epoch: 2438882
GCVS spectral type: M5e-M8e


 W Pup
Mean period: 120.35, Mean epoch: 2444947.2
GCVS period: 119.7, GCVS epoch: 2444956
GCVS spectral type: M1e-M6e


 Z Pup
Mean period: 511.10, Mean epoch: 2443137.8
GCVS period: 508.6, GCVS epoch: 2443075
GCVS spectral type: M4e-M9e
RW Pup
Mean period: 336.45, Mean epoch: 2442316.6
GCVS period: 340.88, GCVS epoch: 2442360
GCVS spectral type: M3e-M6e
Pyxis
S Pyx
Mean period: 206.30, Mean epoch: 2443563.1
GCVS period: 206.1, GCVS epoch: 2443565
GCVS spectral type: M3e-M5e
Reticulum
R Ret
Mean period: 278.29, Mean epoch: 2441705.8
GCVS period: 278.46, GCVS epoch: 2441703
GCVS spectral type: M4e-M7.5e
Sagitta
W Sge
Mean period: 278.19, Mean epoch: 2444429.2
GCVS period: 278.26, GCVS epoch: 2444423
GCVS spectral type: M4e-M6.5


 ST Sge
Mean period: 192.10, Mean epoch: 2445670.5
GCVS period: 192.31, GCVS epoch: 2445691
GCVS spectral type: M4e
Sagittarius
R Sgr
Mean period: 268.53, Mean epoch: 2443352.6
GCVS period: 269.84, GCVS epoch: 2443371
GCVS spectral type: M4e-M6e


 S Sgr
Mean period: 230.81, Mean epoch: 2440477.5
GCVS period: 230.64, GCVS epoch: 2440478
GCVS spectral type: M3e-M4.5e


 T Sgr
Mean period: 392.93, Mean epoch: 2444843.7
GCVS period: 394.66, GCVS epoch: 2444897
GCVS spectral type: S4.5,8e-S5.5,8e
Z Sgr
Mean period: 452.11, Mean epoch: 2439304.3
GCVS period: 450.41, GCVS epoch: 2439250
GCVS spectral type: M4e-M9(Se)


 RR Sgr
Mean period: 334.24, Mean epoch: 2440780.7
GCVS period: 336.33, GCVS epoch: 2440809
GCVS spectral type: M4e-M9e


 RT Sgr
Mean period: 306.40, Mean epoch: 2442116.2
GCVS period: 306.46, GCVS epoch: 2442083
GCVS spectral type: M5e-M7e
RU Sgr
Mean period: 240.27, Mean epoch: 2441901.7
GCVS period: 240.49, GCVS epoch: 2441900
GCVS spectral type: M3e-M6e


 RV Sgr
Mean period: 318.12, Mean epoch: 2442686.9
GCVS period: 315.85, GCVS epoch: 2442621
GCVS spectral type: M4e-M9


 RX Sgr
Mean period: 333.66, Mean epoch: 2442132.2
GCVS period: 335.23, GCVS epoch: 2442171
GCVS spectral type: M5e
ST Sgr
Mean period: 394.33, Mean epoch: 2440431.2
GCVS period: 395.12, GCVS epoch: 2440463
GCVS spectral type: C4,3e-S9,5e


 SW Sgr
Mean period: 290.61, Mean epoch: 2439279.6
GCVS period: 289.9, GCVS epoch: 2439275
GCVS spectral type: M5e-M8


 TY Sgr
Mean period: 325.94, Mean epoch: 2440062.3
GCVS period: 325.41, GCVS epoch: 2440056
GCVS spectral type: M3e
Scorpius
R Sco
Mean period: 223.24, Mean epoch: 2444668.1
GCVS period: 224.61, GCVS epoch: 2444678
GCVS spectral type: M(3)e


 S Sco
Mean period: 177.60, Mean epoch: 2441446.5
GCVS period: 177.92, GCVS epoch: 2441463
GCVS spectral type: M(3)e


 W Sco
Mean period: 221.16, Mean epoch: 2439163.5
GCVS period: 221.27, GCVS epoch: 2439162
GCVS spectral type:


X Sco
Mean period: 199.53, Mean epoch: 2439094.5
GCVS period: 199.86, GCVS epoch: 2439135
GCVS spectral type: M2e


 Z Sco
Mean period: 350.13, Mean epoch: 2441844.4
GCVS period: 343.03, GCVS epoch: 2441750
GCVS spectral type: M5.5e:-M7e


 RR Sco
Mean period: 279.24, Mean epoch: 2445413.4
GCVS period: 281.45, GCVS epoch: 2445418
GCVS spectral type: M6II-IIIe-M9
RS Sco
Mean period: 319.53, Mean epoch: 2444680.2
GCVS period: 319.91, GCVS epoch: 2444676
GCVS spectral type: M5e-M9


 RT Sco
Mean period: 447.91, Mean epoch: 2439235.5
GCVS period: 449.04, GCVS epoch: 2439252
GCVS spectral type: S7,2(M6e-M7e)


 RU Sco
Mean period: 366.57, Mean epoch: 2439911.9
GCVS period: 370.75, GCVS epoch: 2439980
GCVS spectral type: M4/6e-M7II-IIIe
RW Sco
Mean period: 389.67, Mean epoch: 2439092.4
GCVS period: 388.45, GCVS epoch: 2439078
GCVS spectral type: M5e


 SV Sco
Mean period: 256.24, Mean epoch: 2439599.1
GCVS period: 262, GCVS epoch: 2439606
GCVS spectral type: M3e
Sculptor
S Scl
Mean period: 365.43, Mean epoch: 2442387.3
GCVS period: 362.57, GCVS epoch: 2442345
GCVS spectral type: M3e-M9e(Tc)


 T Scl
Mean period: 202.75, Mean epoch: 2442048.4
GCVS period: 202.42, GCVS epoch: 2441985
GCVS spectral type: M3-M6e


 U Scl
Mean period: 333.82, Mean epoch: 2441444.2
GCVS period: 333.73, GCVS epoch: 2441430
GCVS spectral type: M5e
V Scl
Mean period: 296.50, Mean epoch: 2440378.1
GCVS period: 296.1, GCVS epoch: 2440378
GCVS spectral type: M4e-M6e


 X Scl
Mean period: 261.38, Mean epoch: 2441429.8
GCVS period: 261.63, GCVS epoch: 2441425
GCVS spectral type:


Serpens
R Ser
Mean period: 356.15, Mean epoch: 2445525.5
GCVS period: 356.41, GCVS epoch: 2445521
GCVS spectral type: M5IIIe-M9e


 S Ser
Mean period: 368.47, Mean epoch: 2445434.6
GCVS period: 371.84, GCVS epoch: 2445433
GCVS spectral type: M5e-M6e


 T Ser
Mean period: 340.18, Mean epoch: 2445510.7
GCVS period: 338.12, GCVS epoch: 2445509
GCVS spectral type: M7e
U Ser
Mean period: 237.60, Mean epoch: 2445636.2
GCVS period: 237.5, GCVS epoch: 2445652
GCVS spectral type: M3e-M6e


 BC Ser
Mean period: 245.07, Mean epoch: 2438862.7
GCVS period: 245, GCVS epoch: 2438860
GCVS spectral type: M3e-M5e
Sextans
S Sex
Mean period: 260.17, Mean epoch: 2445318.0
GCVS period: 264.9, GCVS epoch: 2445390
GCVS spectral type: M2e-M5e
Taurus
R Tau
Mean period: 323.44, Mean epoch: 2445278.8
GCVS period: 320.9, GCVS epoch: 2445250
GCVS spectral type: M5e-M9e


 S Tau
Mean period: 373.61, Mean epoch: 2444924.5
GCVS period: 374.5, GCVS epoch: 2444927
GCVS spectral type: M6.5e-M9e


 V Tau
Mean period: 169.94, Mean epoch: 2445325.0
GCVS period: 168.7, GCVS epoch: 2445316
GCVS spectral type: M0e-M4.5e
Z Tau
Mean period: 475.84, Mean epoch: 2443183.2
GCVS period: 466.2, GCVS epoch: 2443436
GCVS spectral type: S7.5,1e(M7e)


 RU Tau
Mean period: 572.20, Mean epoch: 2442761.4
GCVS period: 544.6, GCVS epoch: 2442690
GCVS spectral type: M3.5e-M6.5


 RX Tau
Mean period: 334.84, Mean epoch: 2441264.1
GCVS period: 331.8, GCVS epoch: 2441282
GCVS spectral type: M6e-M7e
VX Tau
Mean period: 300.51, Mean epoch: 2433631.7
GCVS period: 298.9, GCVS epoch: 2433600
GCVS spectral type: M8e
Telescopium
R Tel
Mean period: 463.58, Mean epoch: 2452947.9
GCVS period: 467, GCVS epoch: 2452979
GCVS spectral type: M5IIe-M7e
Triangulum
R Tri
Mean period: 266.58, Mean epoch: 2445208.4
GCVS period: 266.9, GCVS epoch: 2445215
GCVS spectral type: M4IIIe-M8e


 Z Tri
Mean period: 215.83, Mean epoch: 2432890.6
GCVS period: 216.1, GCVS epoch: 2432915
GCVS spectral type: M2e
Tucana
R Tuc
Mean period: 286.19, Mean epoch: 2439746.9
GCVS period: 286.06, GCVS epoch: 2439745
GCVS spectral type: M5e


 S Tuc
Mean period: 240.90, Mean epoch: 2441438.4
GCVS period: 240.71, GCVS epoch: 2441432
GCVS spectral type: M3e-M5II-Ibe


 T Tuc
Mean period: 250.63, Mean epoch: 2441952.0
GCVS period: 250.3, GCVS epoch: 2441974
GCVS spectral type: M3IIe-M6IIe
U Tuc
Mean period: 260.32, Mean epoch: 2444898.5
GCVS period: 264.8, GCVS epoch: 2444914
GCVS spectral type: M3e-M7e
Ursa Major
R UMa
Mean period: 301.38, Mean epoch: 2445579.9
GCVS period: 301.62, GCVS epoch: 2445593
GCVS spectral type: M3e-M9e


 S UMa
Mean period: 225.96, Mean epoch: 2445773.7
GCVS period: 225.87, GCVS epoch: 2445778
GCVS spectral type: S0,9e-S5,9e


 T UMa
Mean period: 256.50, Mean epoch: 2445622.8
GCVS period: 256.6, GCVS epoch: 2445623
GCVS spectral type: M4IIIe-M7e
X UMa
Mean period: 249.20, Mean epoch: 2445696.5
GCVS period: 249.04, GCVS epoch: 2445707
GCVS spectral type: M3e-M4e


 RR UMa
Mean period: 230.85, Mean epoch: 2445720.5
GCVS period: 230.58, GCVS epoch: 2445719
GCVS spectral type: M4e


 RS UMa
Mean period: 259.49, Mean epoch: 2446023.2
GCVS period: 258.97, GCVS epoch: 2445991
GCVS spectral type: M4e-M6e
RU UMa
Mean period: 252.04, Mean epoch: 2445650.2
GCVS period: 252.46, GCVS epoch: 2445687
GCVS spectral type: M3e-M5e
Ursa Minor
S UMi
Mean period: 326.77, Mean epoch: 2445878.7
GCVS period: 331, GCVS epoch: 2445931
GCVS spectral type: M6e-M9e


 T UMi
Mean period: 297.79, Mean epoch: 2444980.8
GCVS period: 301, GCVS epoch: 2445761
GCVS spectral type: M4e-M6e


 U UMi
Mean period: 326.13, Mean epoch: 2445369.2
GCVS period: 330.92, GCVS epoch: 2445418
GCVS spectral type: M6e-M8e
Vela
W Vel
Mean period: 394.10, Mean epoch: 2440649.4
GCVS period: 394.72, GCVS epoch: 2440699
GCVS spectral type: M5-M8IIIe


 Y Vel
Mean period: 445.17, Mean epoch: 2440409.0
GCVS period: 449.9, GCVS epoch: 2440437
GCVS spectral type: M8e-M9.5


 Z Vel
Mean period: 420.12, Mean epoch: 2440005.2
GCVS period: 411.4, GCVS epoch: 2439898
GCVS spectral type: M9e
Virgo
R Vir
Mean period: 145.71, Mean epoch: 2445843.7
GCVS period: 145.63, GCVS epoch: 2445872
GCVS spectral type: M3.5IIIe-M8.5e


 S Vir
Mean period: 377.55, Mean epoch: 2445061.6
GCVS period: 375.1, GCVS epoch: 2445046
GCVS spectral type: M6IIIe-M9.5e


 T Vir
Mean period: 339.30, Mean epoch: 2440263.3
GCVS period: 339.47, GCVS epoch: 2440277
GCVS spectral type: M6e
U Vir
Mean period: 206.69, Mean epoch: 2444741.7
GCVS period: 206.64, GCVS epoch: 2444736
GCVS spectral type: M2e-M8e:


 V Vir
Mean period: 249.44, Mean epoch: 2444656.7
GCVS period: 250.08, GCVS epoch: 2444667
GCVS spectral type: M3e-M6e


 Y Vir
Mean period: 218.24, Mean epoch: 2445788.7
GCVS period: 218.43, GCVS epoch: 2445805
GCVS spectral type: M2e-M5e
Z Vir
Mean period: 304.72, Mean epoch: 2442428.0
GCVS period: 305.71, GCVS epoch: 2442496
GCVS spectral type: M5e


 RR Vir
Mean period: 217.85, Mean epoch: 2438173.9
GCVS period: 217.52, GCVS epoch: 2438146
GCVS spectral type:


RS Vir
Mean period: 353.31, Mean epoch: 2445747.8
GCVS period: 353.95, GCVS epoch: 2445753
GCVS spectral type: M6IIIe-M8e
RU Vir
Mean period: 436.46, Mean epoch: 2437770.7
GCVS period: 433.2, GCVS epoch: 2437773
GCVS spectral type: C8,1e(R3ep)


 RV Vir
Mean period: 267.58, Mean epoch: 2440668.0
GCVS period: 265.87, GCVS epoch: 2440635
GCVS spectral type: M5e


 SU Vir
Mean period: 209.01, Mean epoch: 2444227.9
GCVS period: 208.6, GCVS epoch: 2444278
GCVS spectral type: M2e-M5.5e
SY Vir
Mean period: 236.94, Mean epoch: 2438447.4
GCVS period: 236.65, GCVS epoch: 2438440
GCVS spectral type: M6:
Volans
R Vol
Mean period: 451.45, Mean epoch: 2442225.9
GCVS period: 453.6, GCVS epoch: 2442279
GCVS spectral type: C(N)e


 S Vol
Mean period: 395.21, Mean epoch: 2441948.5
GCVS period: 394.8, GCVS epoch: 2441940
GCVS spectral type: M4e
Vulpecula
R Vul
Mean period: 136.75, Mean epoch: 2445589.4
GCVS period: 136.73, GCVS epoch: 2445586
GCVS spectral type: M3e-M7e


 BD Vul
Mean period: 431.04, Mean epoch: 2425772.7
GCVS period: 430, GCVS epoch: 2425758
GCVS spectral type: C6-7,3e(Ne)