results

WASP-53 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) 3.3098430705610387 1.9677875116618142e-07
Ephemeris (BJD_TDB) 2459971.646298856 0.00019052432924079906
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 31.9091639 decimal
DEC -20.661843 decimal
Host Star Metallicity 0.22 0.11 Kokori et al. 2023
Host Star log(g) 4.553 0.019 Log10(cgs) Kokori et al. 2023
Host Star Radius [R_Sun] 0.798 0.023 Sol Kokori et al. 2023
Host Star Effective Temperature [K] 4953.0 60.0 K Kokori et al. 2023
a/Rs 11.05 0.2 Kokori et al. 2023
eccentricity 0.03 Triaud et al. 2017
inclination [degrees] 87.08 0.16 deg Kokori et al. 2023
omega [degrees] 0.0 deg Kokori et al. 2023
orbital period [days] 3.30984278 2.6e-07 day Kokori et al. 2023
Rp 12.43 0.78 R_Earth ExoFOP-TESS TOI
Rp/Rs 0.1384 0 ExoFOP-TESS TOI
ephemeris [JD] 2457267.50478 0.00012 BJD-TDB Kokori et al. 2023

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2457267.50478 0.00012 BJD-TDB Kokori et al. 2023
2458386.23117 0.00015 BJD-TDB Ivshina & Winn 2022
2456284.48161 0.00015 BJD-TDB Kokori et al. 2022
2459140.875701 0.0002718 BJD ExoFOP-TESS TOI
2455943.56695 0.00011 BJD Triaud et al. 2017

Observations

Light curve chart for 0008441
Parameter Value Uncertainty
Am1 0.95 0.016
Am2 0.0279 0.0058
a/Rs 12.03 0.51
Rp/Rs 0.142 0.02
ephemeris [JD] 2459140.8689 0.0043
eccentricity 0.03
inclination [degrees] 87.08
omega [degrees] 0.0
orbital period [days] 3.30984278
u0 1.4276676710857743
u1 -2.418381393485824
u2 3.0756058796952055
u3 -1.0848921114650565
duration 0.0846 0.0053
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 GJAM (collaborate/publish) MOBS
Light curve chart for 0008383
Parameter Value Uncertainty
Am1 1.003 0.023
Am2 -0.0016 0.0049
a/Rs 10.57 0.48
Rp/Rs 0.223 0.014
ephemeris [JD] 2459213.6973 0.0028
eccentricity 0.03
inclination [degrees] 87.08
omega [degrees] 0.0
orbital period [days] 3.30984278
u0 1.4272893488406215
u1 -2.418464345676655
u2 3.0764358841976343
u3 -1.085260841519134
duration 0.1099 0.0063
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 GSAD (collaborate/publish) MOBS
Light curve chart for 0008442
Parameter Value Uncertainty
Am1 1.081 0.023
Am2 -0.049 0.016
a/Rs 11.54 0.57
Rp/Rs 0.176 0.02
ephemeris [JD] 2459514.8766 0.0051
eccentricity 0.03
inclination [degrees] 87.08
omega [degrees] 0.0
orbital period [days] 3.30984278
u0 1.4275061220500447
u1 -2.4181934699353094
u2 3.0756714061850534
u3 -1.0849840124687133
duration 0.0935 0.0064
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 TRIC (collaborate/publish) MOBS
Light curve chart for 0005356
Parameter Value Uncertainty
Am1 0.986 0.02
Am2 0.0059 0.0053
a/Rs 12.02 0.48
Rp/Rs 0.188 0.016
ephemeris [JD] 2459971.6463 0.0038
eccentricity 0.03
inclination [degrees] 87.08
omega [degrees] 0.0
orbital period [days] 3.30984278
u0 1.4271453730184018
u1 -2.4166269311841084
u2 3.073263137070401
u3 -1.083781533109505
duration 0.0895 0.0052
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 WGAC (collaborate/publish) MOBS