results

WASP-57 b

Total Reductions to Date: 4

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

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) - -
Ephemeris (BJD_TDB) - -
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 223.8199788 decimal
DEC -2.0576866 decimal
Host Star Metallicity -0.25 0.1 Kokori et al. 2023
Host Star log(g) 4.574 0.009 Log10(cgs) Kokori et al. 2023
Host Star Radius [R_Sun] 0.836 0.07 Sol Kokori et al. 2023
Host Star Effective Temperature [K] 5600.0 100.0 K Kokori et al. 2023
a/Rs 8.75 0.23 Kokori et al. 2023
eccentricity 0.059 Bonomo et al. 2017
inclination [degrees] 86.0 0.3 deg Kokori et al. 2023
omega [degrees] 0.0 deg Kokori et al. 2023
orbital period [days] 2.838918 4.9e-07 day Kokori et al. 2023
Rp 12.9 0.79 R_Earth ExoFOP-TESS TOI
Rp/Rs 0.1236 0 ExoFOP-TESS TOI
ephemeris [JD] 2456410.57496 0.00012 BJD-TDB Kokori et al. 2023

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2455717.87811 0.0002 BJD Faedi et al. 2013
2456001.77062 0.00046 BJD-TDB Ivshina & Winn 2022
2456058.5491 0.00016 BJD-TDB Bonomo et al. 2017, Southworth et al. 2015
2456410.57496 0.00012 BJD-TDB Kokori et al. 2023
2456433.2863 0.0001 BJD-TDB Kokori et al. 2022
2459695.204858 0.00134591 BJD ExoFOP-TESS TOI

Observations

Light curve chart for 0011944
Parameter Value Uncertainty
Am1 1.372 0.028
Am2 -0.19 0.025
a/Rs 9.12 0.65
Rp/Rs 0.139 0.056
ephemeris [JD] 2459348.854 0.011
eccentricity 0.059
inclination [degrees] 86.0
omega [degrees] 0.0
orbital period [days] 2.838918
u0 1.7453320274434818
u1 -2.9234244488881287
u2 3.4858849575032145
u3 -1.307792484114834
duration 0.094 0.012
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 MMAMA (collaborate/publish) MOBS
Light curve chart for 0012678
Parameter Value Uncertainty
Am1 0.775 0.02
Am2 0.189 0.071
a/Rs 9.71 0.67
Rp/Rs 0.093 0.047
ephemeris [JD] 2459368.725 0.011
eccentricity 0.059
inclination [degrees] 86.0
omega [degrees] 0.0
orbital period [days] 2.838918
u0 1.7448137991580162
u1 -2.9221377601728156
u2 3.484535316937252
u3 -1.3072113039988298
duration 0.08 0.01
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 DJSA (collaborate/publish) MOBS
Light curve chart for 0008889
Parameter Value Uncertainty
Am1 1.236 0.049
Am2 -0.18 0.14
a/Rs 9.89 0.67
Rp/Rs 0.144 0.052
ephemeris [JD] 2459385.782 0.012
eccentricity 0.059
inclination [degrees] 86.0
omega [degrees] 0.0
orbital period [days] 2.838918
u0 1.7455409613641546
u1 -2.9249244271962613
u2 3.4879475407075504
u3 -1.3085640229009754
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 GHUA (collaborate/publish) MOBS
Light curve chart for 0000732
Parameter Value Uncertainty
Am1 0.973 0.024
Am2 0.024 0.018
a/Rs 9.49 0.66
Rp/Rs 0.083 0.033
ephemeris [JD] 2459385.777 0.012
eccentricity 0.059
inclination [degrees] 86.0
omega [degrees] 0.0
orbital period [days] 2.838918
u0 2.432158447719297
u1 -4.3188633489611306
u2 4.4822650379078235
u3 -1.5955600698750367
duration 0.0819 0.0099
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
CBB Astrodon ExoPlanet-BB 500.0 nm 1000.0 nm
Organization Observer Code Secondary Observers
AAVSO LPAC (collaborate/publish)