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WASP-31 b

View target in exoplanet catalog
Timing Plot
Global Light Curve

Total Reductions to Date: 9

Date Processed: 03/30/2025 at 07:00:21 (PDT)

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 3.4058875941544073 2.2633819698119224e-07
Ephemeris (BJD_TDB) 2460379.855827653 0.00025717237262071815

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 169.4388603 decimal
DEC -19.0547781 decimal
Host Star Metallicity -0.2 0.09 Bonomo et al. 2017
Host Star log(g) 4.30907 0.070364 Log10(cgs) ExoFOP-TESS TOI
Host Star Radius [R_Sun] 1.252 0.03 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 0008401
Parameter Value Uncertainty
Am1 1.178 0.05
Am2 -0.047 0.019
a/Rs 7.92 0.55
Rp/Rs 0.246 0.073
ephemeris [JD] 2458230.757 0.011
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 1.9233860804915568
u1 -3.3330628933459807
u2 3.87386399204126
u3 -1.464187121461764
duration 0.107 0.014
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 SSTP (collaborate/publish) MOBS
Light curve chart for 0008552
Parameter Value Uncertainty
Am1 1.0267 0.0086
Am2 -0.013 0.021
a/Rs 7.91 0.46
Rp/Rs 0.132 0.021
ephemeris [JD] 2458574.7333 0.0058
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 1.9256917036025472
u1 -3.3421649552642023
u2 3.8853919573342948
u3 -1.468918647775788
duration 0.114 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 1.125 0.0097
Am2 -0.042 0.02
a/Rs 7.07 0.54
Rp/Rs 0.208 0.045
ephemeris [JD] 2458877.8695 0.009
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 1.9226890988640737
u1 -3.3305228922782733
u2 3.870743982859533
u3 -1.4629101317667534
duration 0.0833 0.003
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 0008422
Parameter Value Uncertainty
Am1 0.89 0.011
Am2 0.066 0.029
a/Rs 8.54 0.53
Rp/Rs 0.065 0.041
ephemeris [JD] 2459337.666 0.011
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 1.9241274793832785
u1 -3.3368672014313763
u2 3.8792488068658377
u3 -1.4665090270124277
duration 0.073 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 SSTP (collaborate/publish) MOBS
Light curve chart for 0005718
Parameter Value Uncertainty
Am1 1.004 0.021
Am2 -0.0 0.01
a/Rs 8.44 0.54
Rp/Rs 0.053 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 1.924141534171131
u1 -3.336208419899421
u2 3.8781503693828157
u3 -1.4660834258655817
duration 0.085 0.015
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 1.0 0.012
Am2 -0.0006 0.0044
a/Rs 7.51 0.52
Rp/Rs 0.123 0.04
ephemeris [JD] 2459633.9755 0.01
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 1.9241414483669774
u1 -3.336371909784782
u2 3.8783915196190706
u3 -1.466161000408729
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 -0.0198 0.006
a/Rs 7.69 0.41
Rp/Rs 0.159 0.021
ephemeris [JD] 2460001.8071 0.0051
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 2.1271530779570287
u1 -3.8083967783406463
u2 4.269269534441461
u3 -1.5880257704407703
duration 0.126 0.013
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 1.0349 0.0033
Am2 -0.032 0.025
a/Rs 8.13 0.23
Rp/Rs 0.1313 0.0055
ephemeris [JD] 2460066.5191 0.0039
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 2.5252059496740737
u1 -4.46672444238274
u2 4.554969664642855
u3 -1.6134511040598514
duration 0.1074 0.0053
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)
Light curve chart for 0005652
Parameter Value Uncertainty
Am1 1.063 0.011
Am2 -0.0277 0.0075
a/Rs 7.08 0.4
Rp/Rs 0.169 0.012
ephemeris [JD] 2460379.8412 0.0054
eccentricity 0.047
inclination [degrees] 84.41
omega [degrees] 0.0
orbital period [days] 3.4058875
u0 2.3181210902410694
u1 -4.055986558097676
u2 4.285045184127775
u3 -1.5471796524190191
duration 0.0768 0.0082
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
R Cousins R 561.7 nm 719.7 nm
Organization Observer Code Secondary Observers
AAVSO RHEC (collaborate/publish)

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