results

WASP-157 b

Timing Plot

Total Reductions to Date: 4

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

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 3.9516137292599525 4.374613358287242e-07
Ephemeris (BJD_TDB) 2460035.787998798 0.00026167768419897095
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 201.6551525 decimal
DEC -8.3176353 decimal
Host Star Metallicity 0.34 0.09 Kokori et al. 2023
Host Star log(g) 4.5 0.2 Log10(cgs) Kokori et al. 2023
Host Star Radius [R_Sun] 1.134 0.051 Sol Kokori et al. 2023
Host Star Effective Temperature [K] 5838.0 140.0 K Kokori et al. 2023
a/Rs 10.04 0.04 Kokori et al. 2023
eccentricity 0.0 Močnik et al. 2016
inclination [degrees] 84.93 0.45 deg Kokori et al. 2023
omega [degrees] 0.0 deg Kokori et al. 2023
orbital period [days] 3.95161588 3e-07 day Kokori et al. 2023
Rp 11.81 0.91 R_Earth Kruse et al. 2019
Rp/Rs 0.0873 0 Kruse et al. 2019
ephemeris [JD] 2457846.594001 3.6e-05 BJD-TDB Kokori et al. 2023

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2457222.238635 0.000193 BJD Livingston et al. 2018, Petigura et al. 2018
2457257.803194 8.8e-05 BJD Močnik et al. 2016
2457265.70719 9e-05 BJD-TDB Kokori et al. 2022
2457846.594001 3.6e-05 BJD-TDB Kokori et al. 2023

Observations

Light curve chart for 0000863
Parameter Value Uncertainty
Am1 1.016 0.023
Am2 -0.006 0.01
a/Rs 10.23 0.11
Rp/Rs 0.139 0.048
ephemeris [JD] 2459387.713 0.01
eccentricity 0.0
inclination [degrees] 84.93
omega [degrees] 0.0
orbital period [days] 3.95161588
u0 2.28450637545391
u1 -4.007841031642146
u2 4.231601849835379
u3 -1.5082671305913617
duration 0.076 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
CBB Astrodon ExoPlanet-BB 500.0 nm 1000.0 nm
Organization Observer Code Secondary Observers
AAVSO LPAC (collaborate/publish)
Light curve chart for 0003108
Parameter Value Uncertainty
Am1 0.9991 0.007
Am2 0.0011 0.0051
a/Rs 9.85 0.11
Rp/Rs 0.109 0.016
ephemeris [JD] 2460031.8295 0.0051
eccentricity 0.0
inclination [degrees] 84.93
omega [degrees] 0.0
orbital period [days] 3.95161588
u0 2.207427159231879
u1 -3.791839452357464
u2 4.01804733265535
u3 -1.4336349796561936
duration 0.0883 0.0042
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 MBEB (collaborate/publish)
Light curve chart for 0003089
Parameter Value Uncertainty
Am1 0.9889 0.0071
Am2 0.0041 0.0036
a/Rs 9.93 0.11
Rp/Rs 0.09 0.013
ephemeris [JD] 2460031.8173 0.0031
eccentricity 0.0
inclination [degrees] 84.93
omega [degrees] 0.0
orbital period [days] 3.95161588
u0 1.6707624750539412
u1 -2.9083309203634173
u2 3.582149292924878
u3 -1.3445807942372179
duration 0.0824 0.0037
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 CCHD (collaborate/publish)
Light curve chart for 0003107
Parameter Value Uncertainty
Am1 0.9974 0.0081
Am2 0.0037 0.0047
a/Rs 10.23 0.12
Rp/Rs 0.14 0.023
ephemeris [JD] 2460035.7976 0.004
eccentricity 0.0
inclination [degrees] 84.93
omega [degrees] 0.0
orbital period [days] 3.95161588
u0 1.9170873949301908
u1 -3.416451839583226
u2 3.9461535423842227
u3 -1.4467890389289177
duration 0.081 0.0046
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 MBEB (collaborate/publish)