results

HAT-P-57 b

Timing Plot

Total Reductions to Date: 2

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

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 2.465295428871229 3.048758562386773e-07
Ephemeris (BJD_TDB) 2460480.4295197492 0.00040698550325592305
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 274.743418 decimal
DEC 10.5971968 decimal
Host Star Metallicity -0.25 0.25 Kokori et al. 2023
Host Star log(g) 4.251 0.018 Log10(cgs) Kokori et al. 2023
Host Star Radius [R_Sun] 1.5 0.05 Sol Kokori et al. 2023
Host Star Effective Temperature [K] 7500.0 250.0 K Kokori et al. 2023
a/Rs 5.83 0.07 Kokori et al. 2023
eccentricity 0.0 Stassun et al. 2017
inclination [degrees] 88.3 0.8 deg Kokori et al. 2023
omega [degrees] 0.0 deg Kokori et al. 2023
orbital period [days] 2.46529488 4.6e-07 day Kokori et al. 2023
Rp 17.09 0.75 R_Earth ExoFOP-TESS TOI
Rp/Rs 0.1095 0 ExoFOP-TESS TOI
ephemeris [JD] 2457598.49926 0.00037 BJD-TDB Kokori et al. 2023

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2457598.49926 0.00037 BJD-TDB Kokori et al. 2023
2457159.6765 0.0006 BJD-TDB Kokori et al. 2022
2460480.429067 0.00044377 BJD ExoFOP-TESS TOI
2455113.48127 0.00048 BJD Hartman et al. 2015

Observations

Light curve chart for 0001439
Parameter Value Uncertainty
Am1 1.0252 0.0084
Am2 -0.0217 0.0086
a/Rs 5.53 0.18
Rp/Rs 0.1024 0.0054
ephemeris [JD] 2459708.8081 0.0048
eccentricity 0.0
inclination [degrees] 88.3
omega [degrees] 0.0
orbital period [days] 2.46529488
u0 2.2846594204217796
u1 -3.954155178890011
u2 4.221768569284094
u3 -1.5522727479066085
duration 0.1107 0.0056
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
CV Clear (unfiltered) reduced to V sequence 350.0 nm 850.0 nm
Organization Observer Code Secondary Observers
AAVSO NANF (collaborate/publish)
Light curve chart for 0003982
Parameter Value Uncertainty
Am1 0.9905 0.0053
Am2 0.0075 0.0037
a/Rs 6.18 0.059
Rp/Rs 0.1086 0.0035
ephemeris [JD] 2460132.8279 0.0018
eccentricity 0.0
inclination [degrees] 88.3
omega [degrees] 0.0
orbital period [days] 2.46529488
u0 2.836467601982624
u1 -5.094181700288942
u2 4.995102494567886
u3 -1.7373883218287403
duration 0.1396 0.0014
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)