results

WASP-31 b

Timing Plot

Total Reductions to Date: 8

Date Processed: 09/06/2025 at 07:00:04 (PDT)

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 3.4058876245074448 2.259419634446385e-07
Ephemeris (BJD_TDB) 2460066.5142015787 0.00023493406676666426
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 169.4388603 decimal
DEC -19.0547781 decimal
Host Star Metallicity -0.2 0.09 Kokori et al. 2023
Host Star log(g) 4.308 0.02 Log10(cgs) Kokori et al. 2023
Host Star Radius [R_Sun] 1.252 0.033 Sol Kokori et al. 2023
Host Star Effective Temperature [K] 6302.0 102.0 K Kokori et al. 2023
a/Rs 8.0 0.19 Kokori et al. 2023
eccentricity 0.047 Bonomo et al. 2017
inclination [degrees] 84.41 0.22 deg Kokori et al. 2023
omega [degrees] 0.0 deg Kokori et al. 2023
orbital period [days] 3.4058875 2.7e-07 day Kokori et al. 2023
Rp 17.29 0.74 R_Earth ExoFOP-TESS TOI
Rp/Rs 0.1245 0 ExoFOP-TESS TOI
ephemeris [JD] 2457277.09226 0.00012 BJD-TDB Kokori et al. 2023

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2457277.09226 0.00012 BJD-TDB Kokori et al. 2023
2458554.30005 0.00026 BJD Patel & Espinoza 2022
2456371.12617 0.00014 BJD-TDB Ivshina & Winn 2022
2456183.80208 0.0002 BJD-TDB Kokori et al. 2022
2459303.595258 0.0003068 BJD ExoFOP-TESS TOI
2455873.86662 0.00011 BJD-TDB Bonomo et al. 2017
2455192.6887 0.0003 HJD Anderson et al. 2011

Observations

Light curve chart for 0005391
Parameter Value Uncertainty
Am1 2.93 1.61
Am2 -0.41 0.27
a/Rs 8.81 0.55
Rp/Rs 0.197 0.072
ephemeris [JD] 2458230.72 0.012
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 1.9164310736936736
u1 -3.2882513191905627
u2 3.806403415770667
u3 -1.4345831135539475
duration 0 0
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO FTIA (collaborate/publish) MOBS
Light curve chart for 0008552
Parameter Value Uncertainty
Am1 1.0283 0.0086
Am2 -0.015 0.021
a/Rs 7.93 0.45
Rp/Rs 0.133 0.021
ephemeris [JD] 2458574.7336 0.0059
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 1.9167054734718256
u1 -3.289220953764365
u2 3.807524237743715
u3 -1.435008700714643
duration 0.113 0.011
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO MJOU (collaborate/publish) MOBS
Light curve chart for 0008421
Parameter Value Uncertainty
Am1 1.1264 0.0097
Am2 -0.042 0.019
a/Rs 7.11 0.53
Rp/Rs 0.209 0.047
ephemeris [JD] 2458877.8695 0.0091
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 1.9162798675853545
u1 -3.286884461151895
u2 3.804197174293258
u3 -1.4335925240397618
duration 0.0833 0.0032
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO VIVA (collaborate/publish) MOBS
Light curve chart for 0012568
Parameter Value Uncertainty
Am1 0.943 0.01
Am2 0.034 0.027
a/Rs 7.28 0.54
Rp/Rs 0.091 0.034
ephemeris [JD] 2459337.643 0.01
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 1.916699014935108
u1 -3.2888296912350845
u2 3.806921656183003
u3 -1.4347909231554734
duration 0.074 0.013
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO MSPA (collaborate/publish) MOBS
Light curve chart for 0005718
Parameter Value Uncertainty
Am1 1.001 0.021
Am2 0.001 0.01
a/Rs 8.37 0.54
Rp/Rs 0.049 0.031
ephemeris [JD] 2459599.916 0.011
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 1.9160883179999664
u1 -3.2868763283968447
u2 3.804626100004683
u3 -1.433838032914458
duration 0.087 0.016
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO GJOK (collaborate/publish) MOBS
Light curve chart for 0005506
Parameter Value Uncertainty
Am1 1.001 0.012
Am2 -0.0008 0.0046
a/Rs 7.53 0.52
Rp/Rs 0.123 0.04
ephemeris [JD] 2459633.9763 0.0098
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 1.916942026494984
u1 -3.289565354915486
u2 3.807657345470097
u3 -1.4350339603110784
duration 0.109 0.013
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO AEDB (collaborate/publish) MOBS
Light curve chart for 0002835
Parameter Value Uncertainty
Am1 1.055 0.017
Am2 -0.0196 0.0059
a/Rs 7.68 0.41
Rp/Rs 0.159 0.02
ephemeris [JD] 2460001.8069 0.0048
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 2.12280987730443
u1 -3.774621704336754
u2 4.215912660283132
u3 -1.564100770428813
duration 0.126 0.012
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
CV MObs CV 350.0 nm 850.0 nm
Organization Observer Code Secondary Observers
AAVSO FMAA (collaborate/publish) MOBS
Light curve chart for 0004798
Parameter Value Uncertainty
Am1 1.0375 0.0033
Am2 -0.035 0.025
a/Rs 8.12 0.23
Rp/Rs 0.1309 0.0056
ephemeris [JD] 2460066.5193 0.0038
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 2.530003515255723
u1 -4.475004703759199
u2 4.559360707980457
u3 -1.6143594515372124
duration 0.1079 0.0054
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
RJ Johnson R 590.0 nm 810.0 nm
Organization Observer Code Secondary Observers
AAVSO PNIF (collaborate/publish)