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 the organizations AAVSO, AFOEV, VSOLJ and BAA/VSS 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 period and epoch from GCVS4. 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 mean magnitude at max ± standard deviation. The extreme values is showed in parenthesis.
The 3rd row shows the spectral type from GCVS4.
The 4th 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 true 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 for the fit. The GCVS4 epoch is added by this amount to get a mean zero point in the diagrams (though you then end up with that the epoch may not coincides with a maximum).
The 5th 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 6th and 7th 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
Period: 409.2, Epoch: 2453820    LC  Avg  Per
Mag at max: 7.1 ±0.6 (6.1-8.6)
Spectral type: S3,5e-S8,8e(M7e)
ΔP: 0.51 ±0.06 (t:8.2, r2:0.353) ΔEpoch: -10.7
ΔP/C: 0.013 ±0.003 (t:3.8, r2:0.105)
E/P (X=15) ε2: 79.4, 2a2: -42.9, r2: 0.988
E/P (X=5) ε2: 50.3, 2a2: 37.9, r2: 0.914

 T And
Period: 281, Epoch: 2450854    LC  Avg  Per
Mag at max: 8.6 ±0.3 (7.8-9.5)
Spectral type: M4e-M7.5e
ΔP: -0.2 ±0.05 (t:4.4, r2:0.11) ΔEpoch: -37.4
ΔP/C: 0.006 ±0.002 (t:2.8, r2:0.05)
E/P (X=15) ε2: 65.7, 2a2: -104.6, r2: 0.988
E/P (X=5) ε2: 37.9, 2a2: -12.6, r2: 0.969

 U And
Period: 347.7, Epoch: 2449564    LC  Avg  Per
Mag at max: 10.1 ±0.4 (9.3-11.2)
Spectral type: M6e
ΔP: -1.44 ±0.05 (t:27.4, r2:0.865) ΔEpoch: 3.5
ΔP/C: -0.011 ±0.003 (t:3.7, r2:0.102)
E/P (X=15) ε2: 46.9, 2a2: -15.5, r2: 0.995
E/P (X=5) ε2: 38.7, 2a2: 9.8, r2: 0.989

 V And
Period: 256.4, Epoch: 2451528    LC  Avg  Per
Mag at max: 9.5 ±0.3 (8.3-10.1)
Spectral type: M2e-M3e
ΔP: 1.47 ±0.02 (t:61.2, r2:0.96) ΔEpoch: 9.7
ΔP/C: 0 ±0.001 (t:0.2, r2:0)
E/P (X=15) ε2: 22.9, 2a2: 14.2, r2: 0.993
E/P (X=5) ε2: 16.9, 2a2: 30.8, r2: 0.981
W And
Period: 397.3, Epoch: 2448654    LC  Avg  Per
Mag at max: 7.7 ±0.5 (6.5-9.1)
Spectral type: S6,1e-S9,2e
ΔP: -1.34 ±0.06 (t:21, r2:0.811) ΔEpoch: 20.4
ΔP/C: -0.023 ±0.004 (t:5.7, r2:0.242)
E/P (X=15) ε2: 28.2, 2a2: 16.6, r2: 0.994
E/P (X=5) ε2: 22.8, 2a2: 27.5, r2: 0.992

 X And
Period: 343.4, Epoch: 2449620    LC  Avg  Per
Mag at max: 9.1 ±0.4 (8.2-11.5)
Spectral type: S2,9e-S5,5e
ΔP: 2.37 ±0.04 (t:58.9, r2:0.968) ΔEpoch: 19.3
ΔP/C: -0.006 ±0.003 (t:2.4, r2:0.049)
E/P (X=15) ε2: 31.2, 2a2: 28.4, r2: 0.965
E/P (X=5) ε2: 25, 2a2: 37.3, r2: 0.879

 Y And
Period: 220.5, Epoch: 2449489    LC  Avg  Per
Mag at max: 9.2 ±0.4 (8.4-10.4)
Spectral type: M3e-M4.5e
ΔP: 0.31 ±0.02 (t:17.7, r2:0.64) ΔEpoch: 5.9
ΔP/C: 0.007 ±0.001 (t:12.2, r2:0.46)
E/P (X=15) ε2: 5.1, 2a2: 32.3, r2: 0.965
E/P (X=5) ε2: 7.6, 2a2: 23.9, r2: 0.989

 RR And
Period: 330.6, Epoch: 2449644    LC  Avg  Per
Mag at max: 9.1 ±0.4 (8.4-10.3)
Spectral type: S6.5,2e
ΔP: -2.68 ±0.04 (t:71.1, r2:0.977) ΔEpoch: -13
ΔP/C: 0.005 ±0.002 (t:2.3, r2:0.041)
E/P (X=15) ε2: 12.7, 2a2: 34.9, r2: 0.987
E/P (X=5) ε2: 11.4, 2a2: 39.5, r2: 0.998
RW And
Period: 430, Epoch: 2453360    LC  Avg  Per
Mag at max: 9 ±0.7 (7.9-11.2)
Spectral type: M5e-M10e(S6,2e)
ΔP: 0 ±0.07 (t:0, r2:0) ΔEpoch: 24.5
ΔP/C: -0.018 ±0.005 (t:3.4, r2:0.116)
E/P (X=15) ε2: 34.6, 2a2: 27.4, r2: 0.994
E/P (X=5) ε2: 36.2, 2a2: 26.5, r2: 0.983

 RY And
Period: 391.2, Epoch: 2453400    LC  Avg  Per
Mag at max: 10.7 ±0.4 (10.0-11.4)
Spectral type: M8
ΔP: 1.29 ±0.13 (t:9.8, r2:0.74) ΔEpoch: 13.9
ΔP/C: -0.033 ±0.012 (t:2.6, r2:0.174)
E/P (X=15) ε2: 35.9, 2a2: 109.2, r2: 0.719
E/P (X=5) ε2: 64.9, 2a2: -22.9, r2: 0.917

 SV And
Period: 313, Epoch: 2453220    LC  Avg  Per
Mag at max: 8.9 ±0.4 (7.8-10.1)
Spectral type: M5e-M7e
ΔP: 2.57 ±0.08 (t:34.1, r2:0.908) ΔEpoch: 41.2
ΔP/C: -0.039 ±0.003 (t:12.6, r2:0.576)
E/P (X=15) ε2: 46.7, 2a2: -56.7, r2: 0.987
E/P (X=5) ε2: 28, 2a2: 4.4, r2: 0.999

 SX And
Period: 332.8, Epoch: 2453208    LC  Avg  Per
Mag at max: 9.5 ±0.3 (8.9-10.5)
Spectral type: M6.5e
ΔP: -0.26 ±0.26 (t:1, r2:0.029) ΔEpoch: -14.7
ΔP/C: 0.154 ±0.033 (t:4.7, r2:0.401)
E/P (X=15) ε2: 59.8, 2a2: -27.7, r2: 0.926
E/P (X=5) ε2: 44.5, 2a2: 12.9, r2: 0.981
SZ And
Period: 344, Epoch: 2453520    LC  Avg  Per
Mag at max: 10.6 ±0.4 (9.8-11.9)
Spectral type: M2e
ΔP: -1.26 ±0.05 (t:23.1, r2:0.87) ΔEpoch: -15.2
ΔP/C: -0.009 ±0.005 (t:1.9, r2:0.043)
E/P (X=15) ε2: 14.7, 2a2: -4.9, r2: 0.984
E/P (X=5) ε2: 10.9, 2a2: 11.2, r2: 0.979

 TU And
Period: 316.8, Epoch: 2453700    LC  Avg  Per
Mag at max: 8.2 ±0.2 (7.8-8.9)
Spectral type: M5e
ΔP: 0.49 ±0.1 (t:4.7, r2:0.213) ΔEpoch: -23.7
ΔP/C: 0.044 ±0.005 (t:9.6, r2:0.535)
E/P (X=15) ε2: 113.4, 2a2: -232.2, r2: 0.951
E/P (X=5) ε2: 43.4, 2a2: 19.3, r2: 0.958

 UW And
Period: 237, Epoch: 2454024    LC  Avg  Per
Mag at max: 10.4 ±0.3 (9.8-11.1)
Spectral type: M5
ΔP: 3.86 ±0.15 (t:26.5, r2:0.954) ΔEpoch: 28.1
ΔP/C: -0.062 ±0.008 (t:7.9, r2:0.654)
E/P (X=15) ε2: 27.2, 2a2: -10.5, r2: 0.646
E/P (X=5) ε2: 24.7, 2a2: 0.1, r2: 0.688

 UZ And
Period: 316, Epoch: 2453990    LC  Avg  Per
Mag at max: 10.3 ±0.4 (9.0-11.2)
Spectral type: M7e
ΔP: -1.61 ±0.03 (t:46.7, r2:0.952) ΔEpoch: -3.5
ΔP/C: 0.003 ±0.002 (t:1.4, r2:0.019)
E/P (X=15) ε2: 12.5, 2a2: 46.2, r2: 0.933
E/P (X=5) ε2: 23.7, 2a2: 7.5, r2: 0.984
YZ And
Period: 207, Epoch: 2454092    LC  Avg  Per
Mag at max: 10.5 ±0.3 (10.0-11.3)
Spectral type: M5e
ΔP: 0.77 ±0.08 (t:9.4, r2:0.717) ΔEpoch: 8.7
ΔP/C: -0.038 ±0.006 (t:6.5, r2:0.552)
E/P (X=15) ε2: 13.7, 2a2: -24.5, r2: 0.766
E/P (X=5) ε2: 2.6, 2a2: 18.3, r2: 0.66

 AX And
Period: 378, Epoch: 2451980    LC  Avg  Per
Mag at max: 10.4 ±0.4 (9.7-11.1)
Spectral type:
ΔP: 2.77 ±0.3 (t:9.2, r2:0.756) ΔEpoch: 12.8
ΔP/C: -0.239 ±0.037 (t:6.5, r2:0.623)
E/P (X=15) ε2: 64.3, 2a2: -64.3, r2: 0.948
E/P (X=5) ε2: 39.1, 2a2: -15.1, r2: 0.849

 BG And
Period: 289.5, Epoch: 2454045    LC  Avg  Per
Mag at max: 9.6 ±0.3 (8.8-10.5)
Spectral type: S6.5,5e
ΔP: 1.75 ±0.19 (t:9.2, r2:0.702) ΔEpoch: 9.9
ΔP/C: -0.119 ±0.018 (t:6.5, r2:0.544)
E/P (X=15) ε2: 21.1, 2a2: 44.7, r2: 0.806
E/P (X=5) ε2: 37.5, 2a2: 2.2, r2: 0.913

 BU And
Period: 378, Epoch: 2453585    LC  Avg  Per
Mag at max: 10.2 ±0.5 (9.2-11.1)
Spectral type: M7e
ΔP: 0.51 ±0.3 (t:1.7, r2:0.136) ΔEpoch: 1.2
ΔP/C: 0.029 ±0.07 (t:0.4, r2:0.01)
E/P (X=15) ε2: 15, 2a2: 96.4, r2: 0.433
E/P (X=5) ε2: 33.1, 2a2: 3.9, r2: 0.961
Apus
T Aps
Period: 261.03, Epoch: 2441096    LC  Avg  Per
Mag at max: 9.2 ±0.4 (8.0-10.2)
Spectral type: M3e
ΔP: 0.22 ±0.03 (t:7.8, r2:0.316) ΔEpoch: 9.3
ΔP/C: 0.007 ±0.001 (t:5.8, r2:0.205)
E/P (X=15) ε2: 13, 2a2: 6, r2: 0.995
E/P (X=5) ε2: 11.9, 2a2: 8.9, r2: 0.985
Aquarius
R Aqr
Period: 390, Epoch: 2454045    LC  Avg  Per
Mag at max: 7 ±0.6 (5.3-9.4)
Spectral type: M5e-M8.5e+pec
ΔP: -3.25 ±0.05 (t:67.7, r2:0.972) ΔEpoch: -34.4
ΔP/C: 0.004 ±0.002 (t:2.4, r2:0.044)
E/P (X=15) ε2: 34.5, 2a2: 46.1, r2: 0.924
E/P (X=5) ε2: 38.5, 2a2: 8.3, r2: 0.988

 S Aqr
Period: 279.3, Epoch: 2452107    LC  Avg  Per
Mag at max: 8.4 ±0.4 (7.7-9.6)
Spectral type: M4e-M6e
ΔP: -0.11 ±0.03 (t:3.4, r2:0.075) ΔEpoch: -32.4
ΔP/C: -0 ±0.001 (t:0.1, r2:0)
E/P (X=15) ε2: 16.5, 2a2: -0.3, r2: 0.99
E/P (X=5) ε2: 14.1, 2a2: 7.6, r2: 0.974

 T Aqr
Period: 201.1, Epoch: 2453229    LC  Avg  Per
Mag at max: 7.8 ±0.3 (7.0-8.9)
Spectral type: M2e-M5.5e
ΔP: 0.74 ±0.01 (t:52.1, r2:0.926) ΔEpoch: 12.9
ΔP/C: -0.004 ±0 (t:11.5, r2:0.377)
E/P (X=15) ε2: 4.2, 2a2: 23.4, r2: 0.985
E/P (X=5) ε2: 3.2, 2a2: 25.9, r2: 0.883

 W Aqr
Period: 376.1, Epoch: 2453940    LC  Avg  Per
Mag at max: 9.1 ±0.4 (8.0-10.4)
Spectral type: M6-M8e
ΔP: 4.55 ±0.09 (t:49.1, r2:0.958) ΔEpoch: 18.2
ΔP/C: 0.018 ±0.006 (t:2.8, r2:0.07)
E/P (X=15) ε2: 111.1, 2a2: -134.4, r2: 0.995
E/P (X=5) ε2: 80.1, 2a2: -36.2, r2: 0.981
X Aqr
Period: 311.4, Epoch: 2452951    LC  Avg  Per
Mag at max: 8.4 ±0.5 (7.5-9.6)
Spectral type: S6,3e:(M4e-M6.5e)
ΔP: 0.21 ±0.05 (t:4, r2:0.117) ΔEpoch: -2.1
ΔP/C: 0.011 ±0.003 (t:4.1, r2:0.122)
E/P (X=15) ε2: 27.4, 2a2: 40.2, r2: 0.943
E/P (X=5) ε2: 27.2, 2a2: 29.7, r2: 0.958

 Y Aqr
Period: 382.34, Epoch: 2452240    LC  Avg  Per
Mag at max: 9.6 ±0.5 (8.6-11.2)
Spectral type: M6.5e-M9
ΔP: -0.73 ±0.06 (t:12.4, r2:0.615) ΔEpoch: 15
ΔP/C: 0.003 ±0.004 (t:0.6, r2:0.004)
E/P (X=15) ε2: 36.3, 2a2: 27.5, r2: 0.958
E/P (X=5) ε2: 42.2, 2a2: -8.3, r2: 0.979

 RR Aqr
Period: 182.45, Epoch: 2453954    LC  Avg  Per
Mag at max: 9.8 ±0.4 (9.0-11.4)
Spectral type: M2e-M4e
ΔP: -0.01 ±0.01 (t:0.6, r2:0.002) ΔEpoch: 6.7
ΔP/C: -0.002 ±0 (t:5.8, r2:0.155)
E/P (X=15) ε2: 3.5, 2a2: 24.9, r2: 0.953
E/P (X=5) ε2: 4.7, 2a2: 21.4, r2: 0.864

 RS Aqr
Period: 221.3, Epoch: 2454005    LC  Avg  Per
Mag at max: 10.5 ±0.4 (9.1-11.5)
Spectral type: M2e
ΔP: -5.59 ±0.08 (t:67.5, r2:0.965) ΔEpoch: -131.4
ΔP/C: 0.029 ±0.002 (t:11.8, r2:0.461)
E/P (X=15) ε2: 113, 2a2: -210.6, r2: 0.972
E/P (X=5) ε2: 60.1, 2a2: -11.6, r2: 0.984
Aquila
R Aql
Period: 284.2, Epoch: 2443458    LC  Avg  Per
Mag at max: 6.4 ±0.3 (5.2-7.3)
Spectral type: M5e-M9e
ΔP: 16.55 ±0.87 (t:19.1, r2:0.705) ΔEpoch: -122.8
ΔP/C: -0.424 ±0.002 (t:180.4, r2:0.995)
E/P (X=15) ε2: 3183.5, 2a2: -8915.9, r2: 0.939
E/P (X=5) ε2: 1254.3, 2a2: -1294.2, r2: 0.974

 W Aql
Period: 490.43, Epoch: 2439116    LC  Avg  Per
Mag at max: 8.5 ±0.8 (7.4-10.8)
Spectral type: S3,9e-S6,9e
ΔP: -2.45 ±0.15 (t:16.3, r2:0.764) ΔEpoch: -68.4
ΔP/C: -0.058 ±0.009 (t:6.6, r2:0.347)
E/P (X=15) ε2: 119.6, 2a2: -11.8, r2: 0.952
E/P (X=5) ε2: 86.2, 2a2: 54.1, r2: 0.978

 X Aql
Period: 347.04, Epoch: 2441487    LC  Avg  Per
Mag at max: 9.1 ±0.5 (8.3-10.3)
Spectral type: M6e
ΔP: -0.61 ±0.07 (t:8.3, r2:0.368) ΔEpoch: -14.4
ΔP/C: -0.038 ±0.003 (t:13.3, r2:0.6)
E/P (X=15) ε2: 59.7, 2a2: -53.9, r2: 0.995
E/P (X=5) ε2: 45.2, 2a2: -13.2, r2: 0.985

 Z Aql
Period: 129.226, Epoch: 2441938    LC  Avg  Per
Mag at max: 9.6 ±0.4 (8.5-11.0)
Spectral type: M3e
ΔP: 0.27 ±0.01 (t:29.8, r2:0.76) ΔEpoch: 11.3
ΔP/C: 0.002 ±0 (t:9.9, r2:0.258)
E/P (X=15) ε2: 4.9, 2a2: 11.8, r2: 0.988
E/P (X=5) ε2: 3.7, 2a2: 15.1, r2: 0.984
RR Aql
Period: 394.78, Epoch: 2441764    LC  Avg  Per
Mag at max: 9.1 ±0.4 (7.8-10.3)
Spectral type: M6e-M9
ΔP: 0.46 ±0.09 (t:5.2, r2:0.213) ΔEpoch: 7.5
ΔP/C: 0.041 ±0.005 (t:8, r2:0.396)
E/P (X=15) ε2: 62.9, 2a2: 88.8, r2: 0.972
E/P (X=5) ε2: 75.3, 2a2: 22.9, r2: 0.99

 RS Aql
Period: 410.12, Epoch: 2439193    LC  Avg  Per
Mag at max: 10.2 ±0.6 (9.0-12.8)
Spectral type: M5e-M8
ΔP: -0.56 ±0.18 (t:3.2, r2:0.102) ΔEpoch: 38.5
ΔP/C: -0.055 ±0.011 (t:4.8, r2:0.205)
E/P (X=15) ε2: 361.4, 2a2: -654.2, r2: 0.98
E/P (X=5) ε2: 227.3, 2a2: -138.5, r2: 0.992

 RT Aql
Period: 327.11, Epoch: 2443290    LC  Avg  Per
Mag at max: 8.5 ±0.4 (7.4-9.4)
Spectral type: M6e-M8e(S)
ΔP: 0.68 ±0.07 (t:10, r2:0.444) ΔEpoch: 12.5
ΔP/C: 0.005 ±0.004 (t:1.4, r2:0.015)
E/P (X=15) ε2: 71.7, 2a2: -127.8, r2: 0.976
E/P (X=5) ε2: 37.2, 2a2: -2.1, r2: 0.989

 RU Aql
Period: 274.24, Epoch: 2439171    LC  Avg  Per
Mag at max: 9.5 ±0.4 (8.7-12.0)
Spectral type: M5e
ΔP: 0.44 ±0.04 (t:12.3, r2:0.527) ΔEpoch: -4.5
ΔP/C: 0.012 ±0.002 (t:7.1, r2:0.275)
E/P (X=15) ε2: 32.2, 2a2: -24.6, r2: 0.993
E/P (X=5) ε2: 23.2, 2a2: 6.2, r2: 0.994
RV Aql
Period: 218.6, Epoch: 2442618    LC  Avg  Per
Mag at max: 9.3 ±0.4 (8.1-11.0)
Spectral type: M2e-M7:e
ΔP: 0.03 ±0.01 (t:2.1, r2:0.026) ΔEpoch: 7.5
ΔP/C: -0.001 ±0.001 (t:2.1, r2:0.025)
E/P (X=15) ε2: 4, 2a2: 32.5, r2: 0.931
E/P (X=5) ε2: 2.6, 2a2: 36.3, r2: 0.307

 SV Aql
Period: 252.89, Epoch: 2439170    LC  Avg  Per
Mag at max: 11.1 ±0.4 (10.5-11.9)
Spectral type: M8
ΔP: -0.42 ±0.07 (t:5.9, r2:0.495) ΔEpoch: -44.1
ΔP/C: -0.007 ±0.004 (t:1.9, r2:0.093)
E/P (X=15) ε2: 10.3, 2a2: 132.9, r2: 0.105
E/P (X=5) ε2: -12.1, 2a2: 194.7, r2: 0.037

 SY Aql
Period: 355.92, Epoch: 2442651    LC  Avg  Per
Mag at max: 9.9 ±0.6 (8.5-11.3)
Spectral type: M5e-M7e
ΔP: -0.22 ±0.04 (t:5.4, r2:0.207) ΔEpoch: -3.9
ΔP/C: 0.006 ±0.003 (t:2.5, r2:0.052)
E/P (X=15) ε2: 16.5, 2a2: 74.7, r2: 0.946
E/P (X=5) ε2: 26.9, 2a2: 39.1, r2: 0.971

 TU Aql
Period: 270.39, Epoch: 2442930    LC  Avg  Per
Mag at max: 9.3 ±0.4 (8.7-10.3)
Spectral type: M4-M9
ΔP: -0.06 ±0.1 (t:0.6, r2:0.008) ΔEpoch: 17.5
ΔP/C: 0.013 ±0.005 (t:2.6, r2:0.14)
E/P (X=15) ε2: 55.5, 2a2: -6.8, r2: 0.726
E/P (X=5) ε2: 40, 2a2: 36.9, r2: 0.449
EU Aql
Period: 321, Epoch: 2427299    LC  Avg  Per
Mag at max: 11.7 ±0.2 (11.3-12.4)
Spectral type: M9
ΔP: 4.05 ±0.09 (t:46.1, r2:0.993) ΔEpoch: -114.4
ΔP/C: 0.027 ±0.016 (t:1.7, r2:0.154)
E/P (X=15) ε2: 1.2, 2a2: 14.3, r2: 0.118
E/P (X=5) ε2: 6.5, 2a2: 2.3, r2: 0.314
Ara
U Ara
Period: 224.6, Epoch: 2451981    LC  Avg  Per
Mag at max: 8.5 ±0.5 (7.7-10.0)
Spectral type: M3IIep
ΔP: 0.52 ±0.02 (t:23.1, r2:0.767) ΔEpoch: 3.5
ΔP/C: -0.001 ±0.001 (t:1.1, r2:0.007)
E/P (X=15) ε2: 13.3, 2a2: -8.3, r2: 0.983
E/P (X=5) ε2: 8, 2a2: 10.9, r2: 0.979
Aries
R Ari
Period: 185.67, Epoch: 2453640    LC  Avg  Per
Mag at max: 8.3 ±0.3 (7.5-9.7)
Spectral type: M3e-M6e
ΔP: 1.17 ±0.01 (t:112.2, r2:0.981) ΔEpoch: 11.7
ΔP/C: 0.001 ±0 (t:5.4, r2:0.106)
E/P (X=15) ε2: 3.6, 2a2: 22.8, r2: 0.974
E/P (X=5) ε2: 2.7, 2a2: 26.5, r2: 0.763

 S Ari
Period: 291, Epoch: 2453710    LC  Avg  Per
Mag at max: 11 ±0.5 (9.8-12.0)
Spectral type: M4e-M5e
ΔP: 1.52 ±0.04 (t:38.4, r2:0.919) ΔEpoch: -12.3
ΔP/C: 0.012 ±0.001 (t:10.3, r2:0.455)
E/P (X=15) ε2: 23.9, 2a2: -12.1, r2: 0.992
E/P (X=5) ε2: 16.1, 2a2: 13.3, r2: 0.977

 T Ari
Period: 340, Epoch: 2452600    LC  Avg  Per
Mag at max: 8.3 ±0.2 (7.5-8.8)
Spectral type: M6e-M8e
ΔP: -19.29 ±0.12 (t:162.2, r2:0.995) ΔEpoch: -57.7
ΔP/C: 0.015 ±0.005 (t:2.7, r2:0.06)
E/P (X=15) ε2: 117.7, 2a2: 198.2, r2: 0.964
E/P (X=5) ε2: 139.8, 2a2: 109.6, r2: 0.953

 U Ari
Period: 371.1, Epoch: 2453658    LC  Avg  Per
Mag at max: 8.3 ±0.6 (7.2-10.9)
Spectral type: M4e-M7.5e
ΔP: 0.67 ±0.05 (t:13.3, r2:0.606) ΔEpoch: -10.2
ΔP/C: 0.023 ±0.003 (t:9.3, r2:0.433)
E/P (X=15) ε2: 29.9, 2a2: 19.1, r2: 0.988
E/P (X=5) ε2: 25.6, 2a2: 24.3, r2: 0.997
Auriga
R Aur
Period: 457.51, Epoch: 2444004    LC  Avg  Per
Mag at max: 7.7 ±0.4 (6.9-8.5)
Spectral type: M6.5e-M9.5e
ΔP: -0.14 ±0.12 (t:1.1, r2:0.012) ΔEpoch: 23.3
ΔP/C: -0.024 ±0.007 (t:3.3, r2:0.091)
E/P (X=15) ε2: 252.8, 2a2: -477.1, r2: 0.989
E/P (X=5) ε2: 150, 2a2: -131.6, r2: 0.978

 U Aur
Period: 408.09, Epoch: 2443579    LC  Avg  Per
Mag at max: 8.6 ±0.4 (7.6-9.8)
Spectral type: M7e-M9e
ΔP: 0.47 ±0.09 (t:5.3, r2:0.216) ΔEpoch: 8.8
ΔP/C: -0.002 ±0.007 (t:0.3, r2:0.001)
E/P (X=15) ε2: 135, 2a2: -94.9, r2: 0.966
E/P (X=5) ε2: 110, 2a2: -67.2, r2: 0.967

 V Aur
Period: 353, Epoch: 2443435    LC  Avg  Per
Mag at max: 9.4 ±0.3 (8.7-10.2)
Spectral type: C6,2e(N3e)
ΔP: -0.14 ±0.06 (t:2.3, r2:0.045) ΔEpoch: 0.1
ΔP/C: -0.019 ±0.004 (t:5.2, r2:0.201)
E/P (X=15) ε2: 34.9, 2a2: 32.5, r2: 0.992
E/P (X=5) ε2: 32.1, 2a2: 48, r2: 0.968

 W Aur
Period: 274.27, Epoch: 2443165    LC  Avg  Per
Mag at max: 9.3 ±0.4 (8.4-10.5)
Spectral type: M3e-M8e
ΔP: -0.48 ±0.02 (t:19.3, r2:0.722) ΔEpoch: -10.6
ΔP/C: -0.005 ±0.001 (t:4.3, r2:0.113)
E/P (X=15) ε2: 11.1, 2a2: 14.3, r2: 0.993
E/P (X=5) ε2: 11.4, 2a2: 14.1, r2: 0.985
X Aur
Period: 163.79, Epoch: 2444604    LC  Avg  Per
Mag at max: 8.5 ±0.2 (8.0-9.3)
Spectral type: M3e-M7e
ΔP: 0.33 ±0.02 (t:14.4, r2:0.466) ΔEpoch: 35.2
ΔP/C: 0.003 ±0.001 (t:5, r2:0.095)
E/P (X=15) ε2: 23.5, 2a2: -37.6, r2: 0.969
E/P (X=5) ε2: 12, 2a2: 5.9, r2: 0.99

 RR Aur
Period: 307.87, Epoch: 2443031    LC  Avg  Per
Mag at max: 9.9 ±0.3 (9.0-10.6)
Spectral type: M3e-M7e
ΔP: 1.94 ±0.08 (t:23.7, r2:0.926) ΔEpoch: 21.2
ΔP/C: 0.009 ±0.011 (t:0.9, r2:0.018)
E/P (X=15) ε2: 6.5, 2a2: 41.1, r2: 0.747
E/P (X=5) ε2: 10.5, 2a2: 24.9, r2: 0.865

 RU Aur
Period: 466.47, Epoch: 2442520    LC  Avg  Per
Mag at max: 9.6 ±0.5 (8.6-11.3)
Spectral type: M7e-M9e
ΔP: 2.8 ±0.22 (t:12.9, r2:0.712) ΔEpoch: 75.7
ΔP/C: 0.119 ±0.02 (t:6, r2:0.354)
E/P (X=15) ε2: 182.2, 2a2: -117.9, r2: 0.976
E/P (X=5) ε2: 144.9, 2a2: -52.7, r2: 0.992

 ST Aur
Period: 291.94, Epoch: 2438302    LC  Avg  Per
Mag at max: 11 ±0.4 (10.3-11.8)
Spectral type:
ΔP: 0.08 ±0.05 (t:1.6, r2:0.055) ΔEpoch: 5.8
ΔP/C: -0.003 ±0.004 (t:0.7, r2:0.013)
E/P (X=15) ε2: 51.6, 2a2: -73.2, r2: 0.873
E/P (X=5) ε2: 17.4, 2a2: 48.2, r2: 0.771
SZ Aur
Period: 454.04, Epoch: 2439048    LC  Avg  Per
Mag at max: 10.3 ±0.5 (9.3-11.7)
Spectral type: M8e
ΔP: 1.39 ±0.13 (t:10.5, r2:0.707) ΔEpoch: 21.3
ΔP/C: 0.038 ±0.013 (t:2.8, r2:0.148)
E/P (X=15) ε2: 131.4, 2a2: -54.6, r2: 0.74
E/P (X=5) ε2: 89.3, 2a2: -29.7, r2: 0.902

 UV Aur
Period: 394.42, Epoch: 2441062    LC  Avg  Per
Mag at max: 8.4 ±0.3 (8.0-9.5)
Spectral type: C6,2-C8,2Jep(Ne)
ΔP: -1.1 ±0.16 (t:6.9, r2:0.633) ΔEpoch: 11
ΔP/C: 0.002 ±0.017 (t:0.1, r2:0)
E/P (X=15) ε2: 53.2, 2a2: -14.2, r2: 0.63
E/P (X=5) ε2: 12.3, 2a2: 155.3, r2: 0.099

 VX Aur
Period: 322.25, Epoch: 2438673    LC  Avg  Per
Mag at max: 8.7 ±0.1 (8.5-9.1)
Spectral type: M5e
ΔP: 3.07 ±0.14 (t:22.2, r2:0.893) ΔEpoch: 140.5
ΔP/C: 0.061 ±0.008 (t:8.1, r2:0.532)
E/P (X=15) ε2: 256.6, 2a2: -281.9, r2: 0.963
E/P (X=5) ε2: 240.5, 2a2: -267.4, r2: 0.891

 VY Aur
Period: 402.1, Epoch: 2438122    LC  Avg  Per
Mag at max: 10.9 ±0.3 (10.3-11.7)
Spectral type: M8e
ΔP: -3.81 ±0.73 (t:5.2, r2:0.561) ΔEpoch: -28.7
ΔP/C: 0.611 ±0.077 (t:7.9, r2:0.758)
E/P (X=15) ε2: 254.3, 2a2: -241.4, r2: 0.913
E/P (X=5) ε2: 230, 2a2: -254.4, r2: 0.973
AA Aur
Period: 270.17, Epoch: 2442907    LC  Avg  Per
Mag at max: 9.7 ±0.3 (9.1-10.5)
Spectral type: M3e
ΔP: -3.48 ±0.15 (t:22.6, r2:0.939) ΔEpoch: 22.7
ΔP/C: 0.049 ±0.006 (t:8.8, r2:0.709)
E/P (X=15) ε2: 55.6, 2a2: -127.2, r2: 0.87
E/P (X=5) ε2: 22.3, 2a2: -8.9, r2: 0.703

 AZ Aur
Period: 415.92, Epoch: 2442866    LC  Avg  Per
Mag at max: 9.9 ±0.5 (8.8-10.7)
Spectral type: C7,1e-C8,2-3(N0e)
ΔP: -1.14 ±0.18 (t:6.2, r2:0.58) ΔEpoch: 8.5
ΔP/C: -0.019 ±0.017 (t:1.1, r2:0.046)
E/P (X=15) ε2: 17.5, 2a2: 71.3, r2: 0.737
E/P (X=5) ε2: 4.3, 2a2: 127.8, r2: 0.11

 GQ Aur
Period: 304.75, Epoch: 2443918    LC  Avg  Per
Mag at max: 10.8 ±0.2 (10.4-11.3)
Spectral type: M3
ΔP: 0.49 ±0.12 (t:4, r2:0.362) ΔEpoch: -3
ΔP/C: 0.083 ±0.014 (t:6.1, r2:0.576)
E/P (X=15) ε2: 6.3, 2a2: 57.9, r2: 0.328
E/P (X=5) ε2: 13.9, 2a2: 30.9, r2: 0.325
Bootes
R Boo
Period: 223.4, Epoch: 2444518    LC  Avg  Per
Mag at max: 7.2 ±0.3 (6.6-8.1)
Spectral type: M3e-M8e
ΔP: 0.09 ±0.01 (t:8.9, r2:0.267) ΔEpoch: 7
ΔP/C: 0.002 ±0 (t:7.1, r2:0.189)
E/P (X=15) ε2: 7.6, 2a2: 5.3, r2: 0.98
E/P (X=5) ε2: 5, 2a2: 14.7, r2: 0.903

 S Boo
Period: 270.73, Epoch: 2444116    LC  Avg  Per
Mag at max: 8.4 ±0.2 (8.0-9.1)
Spectral type: M3e-M6e
ΔP: 0.36 ±0.04 (t:8.4, r2:0.266) ΔEpoch: 34.8
ΔP/C: 0.015 ±0.001 (t:12, r2:0.426)
E/P (X=15) ε2: 59.6, 2a2: -101, r2: 0.974
E/P (X=5) ε2: 33.9, 2a2: -1.7, r2: 0.999

 Z Boo
Period: 281.14, Epoch: 2441096    LC  Avg  Per
Mag at max: 9.4 ±0.4 (8.4-10.6)
Spectral type: M5e-M6e
ΔP: -0.18 ±0.03 (t:6.1, r2:0.218) ΔEpoch: -15.2
ΔP/C: -0.002 ±0.002 (t:1, r2:0.008)
E/P (X=15) ε2: 12.4, 2a2: 3.8, r2: 0.983
E/P (X=5) ε2: 9.8, 2a2: 15, r2: 0.977

 RR Boo
Period: 194.7, Epoch: 2443047    LC  Avg  Per
Mag at max: 9.4 ±0.3 (8.8-10.3)
Spectral type: M2e-M6e
ΔP: 0.08 ±0.02 (t:4.6, r2:0.125) ΔEpoch: -2.5
ΔP/C: 0.005 ±0.001 (t:8.6, r2:0.335)
E/P (X=15) ε2: 3.2, 2a2: 33.2, r2: 0.905
E/P (X=5) ε2: 3.8, 2a2: 31, r2: 0.694
RT Boo
Period: 273.86, Epoch: 2442722    LC  Avg  Per
Mag at max: 9.9 ±0.3 (9.2-10.3)
Spectral type: M6.5e-M8e
ΔP: -1.48 ±0.12 (t:12.6, r2:0.666) ΔEpoch: -73.5
ΔP/C: -0.059 ±0.003 (t:17.1, r2:0.786)
E/P (X=15) ε2: 153.7, 2a2: -374, r2: 0.937
E/P (X=5) ε2: 58, 2a2: 7.6, r2: 0.988
Caelum
R Cae
Period: 390.95, Epoch: 2440645    LC  Avg  Per
Mag at max: 8.2 ±0.5 (7.1-9.3)
Spectral type: M6e
ΔP: 0.96 ±0.1 (t:9.2, r2:0.46) ΔEpoch: 61.6
ΔP/C: 0.03 ±0.006 (t:4.7, r2:0.184)
E/P (X=15) ε2: 88, 2a2: -178.7, r2: 0.967
E/P (X=5) ε2: 38.4, 2a2: 2.7, r2: 0.945
Camelopardalis
R Cam
Period: 270.22, Epoch: 2443978    LC  Avg  Per
Mag at max: 8.4 ±0.2 (8.0-9.2)
Spectral type: S2,8e-S8,7e
ΔP: 0.09 ±0.04 (t:2.3, r2:0.025) ΔEpoch: -11
ΔP/C: -0.006 ±0.002 (t:3.8, r2:0.069)
E/P (X=15) ε2: 75, 2a2: -96.9, r2: 0.987
E/P (X=5) ε2: 47.6, 2a2: 1.3, r2: 0.996

 T Cam
Period: 373.2, Epoch: 2443433    LC  Avg  Per
Mag at max: 8.2 ±0.2 (7.8-8.6)
Spectral type: S4,7e-S8.5,8e
ΔP: 0.68 ±0.1 (t:6.8, r2:0.285) ΔEpoch: 21.7
ΔP/C: -0.025 ±0.006 (t:4.1, r2:0.13)
E/P (X=15) ε2: 103.5, 2a2: -163.9, r2: 0.972
E/P (X=5) ε2: 64.3, 2a2: -3.7, r2: 0.995

 V Cam
Period: 522.45, Epoch: 2443402    LC  Avg  Per
Mag at max: 9.5 ±0.6 (8.3-10.7)
Spectral type: M7e
ΔP: 0.5 ±0.13 (t:3.7, r2:0.157) ΔEpoch: -10
ΔP/C: -0.014 ±0.014 (t:1.1, r2:0.015)
E/P (X=15) ε2: 58, 2a2: 43.6, r2: 0.977
E/P (X=5) ε2: 65.7, 2a2: -2.9, r2: 0.995

 W Cam
Period: 283.6, Epoch: 2435213    LC  Avg  Per
Mag at max: 10.2 ±0.3 (9.7-11.0)
Spectral type: M7
ΔP: -2.63 ±0.13 (t:20.4, r2:0.93) ΔEpoch: 142.3
ΔP/C: 0.101 ±0.02 (t:5.1, r2:0.468)
E/P (X=15) ε2: 13.9, 2a2: -9.3, r2: 0.944
E/P (X=5) ε2: 7.5, 2a2: 11.6, r2: 0.991
X Cam
Period: 143.56, Epoch: 2444679    LC  Avg  Per
Mag at max: 8.2 ±0.4 (7.5-9.5)
Spectral type: K8-M8e
ΔP: 0.16 ±0.01 (t:15.9, r2:0.477) ΔEpoch: -7
ΔP/C: 0.001 ±0 (t:2.7, r2:0.025)
E/P (X=15) ε2: 4.4, 2a2: 7.4, r2: 0.975
E/P (X=5) ε2: 2.2, 2a2: 15.1, r2: 0.801

 RT Cam
Period: 366.31, Epoch: 2443837    LC  Avg  Per
Mag at max: 9.9 ±0.2 (9.4-10.4)
Spectral type: M6e
ΔP: -0.52 ±0.07 (t:7.9, r2:0.472) ΔEpoch: -34.2
ΔP/C: -0.013 ±0.006 (t:2.2, r2:0.067)
E/P (X=15) ε2: 36.6, 2a2: 25, r2: 0.983
E/P (X=5) ε2: 30.1, 2a2: 43.6, r2: 0.824

 SU Cam
Period: 285.03, Epoch: 2444265    LC  Avg  Per
Mag at max: 9.8 ±0.3 (9.0-10.5)
Spectral type: M5
ΔP: 0.06 ±0.03 (t:2.3, r2:0.091) ΔEpoch: 2.7
ΔP/C: -0.005 ±0.002 (t:2.9, r2:0.134)
E/P (X=15) ε2: 9.2, 2a2: -3, r2: 0.873
E/P (X=5) ε2: 5.7, 2a2: 17.5, r2: 0.777

 SW Cam
Period: 252.8, Epoch: 2443419    LC  Avg  Per
Mag at max: 10.4 ±0.3 (9.7-10.9)
Spectral type: M5e
ΔP: 1.67 ±0.13 (t:13.2, r2:0.906) ΔEpoch: -8.7
ΔP/C: 0.055 ±0.021 (t:2.6, r2:0.288)
E/P (X=15) ε2: 6.4, 2a2: 83.9, r2: 0.099
E/P (X=5) ε2: 29.5, 2a2: -20.4, r2: 0.973
Cancer
R Cnc
Period: 361.6, Epoch: 2444231    LC  Avg  Per
Mag at max: 6.8 ±0.3 (6.1-7.7)
Spectral type: M6e-M9e
ΔP: 0.34 ±0.07 (t:4.8, r2:0.145) ΔEpoch: -2.8
ΔP/C: 0.004 ±0.003 (t:1.5, r2:0.016)
E/P (X=15) ε2: 130.3, 2a2: -218.8, r2: 0.988
E/P (X=5) ε2: 83.4, 2a2: -53.1, r2: 0.971

 U Cnc
Period: 304.78, Epoch: 2440627    LC  Avg  Per
Mag at max: 10.1 ±0.7 (8.9-12.1)
Spectral type: M2e
ΔP: 0.16 ±0.02 (t:6.6, r2:0.224) ΔEpoch: 18
ΔP/C: 0.006 ±0.001 (t:7, r2:0.245)
E/P (X=15) ε2: 16.3, 2a2: 84.9, r2: 0.906
E/P (X=5) ε2: 17.4, 2a2: 73, r2: 0.848

 V Cnc
Period: 272.13, Epoch: 2443485    LC  Avg  Per
Mag at max: 7.9 ±0.3 (7.4-8.7)
Spectral type: S0e-S7,9e
ΔP: 0 ±0.02 (t:0, r2:0) ΔEpoch: 3.9
ΔP/C: 0.001 ±0.001 (t:1.5, r2:0.015)
E/P (X=15) ε2: 6.3, 2a2: 44.2, r2: 0.926
E/P (X=5) ε2: 8.5, 2a2: 33.7, r2: 0.973

 W Cnc
Period: 393.22, Epoch: 2443896    LC  Avg  Per
Mag at max: 8.1 ±0.4 (7.2-9.2)
Spectral type: M6.5e-M9e
ΔP: 0.46 ±0.07 (t:6.7, r2:0.302) ΔEpoch: -10.4
ΔP/C: -0.008 ±0.005 (t:1.7, r2:0.027)
E/P (X=15) ε2: 52.6, 2a2: -21.6, r2: 0.988
E/P (X=5) ε2: 42.1, 2a2: 10, r2: 0.986
RR Cnc
Period: 298.26, Epoch: 2441400    LC  Avg  Per
Mag at max: 9.8 ±0.4 (9.1-10.7)
Spectral type: M3e
ΔP: 0.24 ±0.05 (t:5.2, r2:0.347) ΔEpoch: 3.6
ΔP/C: 0.009 ±0.003 (t:2.7, r2:0.128)
E/P (X=15) ε2: 19.6, 2a2: 111.3, r2: 0.476
E/P (X=5) ε2: 4.5, 2a2: 152.9, r2: 0.013
Canes Venatici
R CVn
Period: 328.53, Epoch: 2443586    LC  Avg  Per
Mag at max: 7.6 ±0.3 (7.0-8.2)
Spectral type: M5.5e-M9e
ΔP: 0 ±0.07 (t:0, r2:0) ΔEpoch: -15.2
ΔP/C: 0.021 ±0.004 (t:5.4, r2:0.182)
E/P (X=15) ε2: 78.7, 2a2: -110.4, r2: 0.984
E/P (X=5) ε2: 53.1, 2a2: -11.2, r2: 0.986

 T CVn
Period: 290.09, Epoch: 2442784    LC  Avg  Per
Mag at max: 9.6 ±0.3 (8.6-10.2)
Spectral type: M6.5e
ΔP: -0.11 ±0.06 (t:1.9, r2:0.025) ΔEpoch: -42.3
ΔP/C: 0.012 ±0.003 (t:3.8, r2:0.095)
E/P (X=15) ε2: 52.6, 2a2: 252.2, r2: 0.922
E/P (X=5) ε2: 81.1, 2a2: 135.9, r2: 0.91

 U CVn
Period: 345.65, Epoch: 2442491    LC  Avg  Per
Mag at max: 9.8 ±0.4 (8.8-10.9)
Spectral type: M7e
ΔP: 0.03 ±0.09 (t:0.4, r2:0.002) ΔEpoch: -26.7
ΔP/C: 0.001 ±0.006 (t:0.1, r2:0)
E/P (X=15) ε2: 115.8, 2a2: -232.3, r2: 0.978
E/P (X=5) ε2: 50.9, 2a2: -19.7, r2: 0.925

 RT CVn
Period: 253.6, Epoch: 2434400    LC  Avg  Per
Mag at max: 10.4 ±0.3 (9.8-11.2)
Spectral type: M5e
ΔP: 0.3 ±0.06 (t:5.3, r2:0.425) ΔEpoch: 4.6
ΔP/C: 0.012 ±0.003 (t:4.9, r2:0.396)
E/P (X=15) ε2: 2.4, 2a2: 10.9, r2: 0.802
E/P (X=5) ε2: -0.6, 2a2: 21.3, r2: 0.093
Canis Minor
R CMi
Period: 337.78, Epoch: 2441323    LC  Avg  Per
Mag at max: 8 ±0.2 (7.4-8.4)
Spectral type: C7,1Je(CSep)
ΔP: -0.14 ±0.05 (t:2.8, r2:0.054) ΔEpoch: -5.5
ΔP/C: -0.017 ±0.002 (t:10.1, r2:0.435)
E/P (X=15) ε2: 39.2, 2a2: 18.2, r2: 0.99
E/P (X=5) ε2: 32, 2a2: 34.2, r2: 0.977

 S CMi
Period: 332.94, Epoch: 2443911    LC  Avg  Per
Mag at max: 7.5 ±0.3 (7.0-8.4)
Spectral type: M6e-M8e
ΔP: 0.08 ±0.06 (t:1.5, r2:0.016) ΔEpoch: -34.9
ΔP/C: 0.009 ±0.002 (t:4.3, r2:0.119)
E/P (X=15) ε2: 63.1, 2a2: -81.3, r2: 0.992
E/P (X=5) ε2: 44.3, 2a2: -16.3, r2: 0.963

 T CMi
Period: 328.3, Epoch: 2442045    LC  Avg  Per
Mag at max: 10.2 ±0.4 (9.2-11.4)
Spectral type: M4Se-M8
ΔP: -7.98 ±0.15 (t:51.9, r2:0.955) ΔEpoch: -107.8
ΔP/C: 0.021 ±0.007 (t:3.1, r2:0.073)
E/P (X=15) ε2: 459.2, 2a2: -1117.9, r2: 0.965
E/P (X=5) ε2: 207.3, 2a2: -173.8, r2: 0.968

 U CMi
Period: 413.88, Epoch: 2443150    LC  Avg  Per
Mag at max: 8.8 ±0.3 (8.2-9.6)
Spectral type: M4e
ΔP: -1.93 ±0.18 (t:10.8, r2:0.545) ΔEpoch: -6
ΔP/C: 0.041 ±0.011 (t:3.7, r2:0.121)
E/P (X=15) ε2: 389.4, 2a2: -655, r2: 0.988
E/P (X=5) ε2: 250.1, 2a2: -171.1, r2: 0.989
V CMi
Period: 366.1, Epoch: 2442737    LC  Avg  Per
Mag at max: 8.7 ±0.6 (7.7-10.4)
Spectral type: M4e-M10
ΔP: 0.17 ±0.05 (t:3.8, r2:0.121) ΔEpoch: 13.3
ΔP/C: 0.008 ±0.003 (t:2.5, r2:0.055)
E/P (X=15) ε2: 19.7, 2a2: 81.4, r2: 0.956
E/P (X=5) ε2: 25.2, 2a2: 53.7, r2: 0.967