results

HAT-P-1 b

Timing Plot

Total Reductions to Date: 7

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

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 4.465300050646635 1.369346686927403e-07
Ephemeris (BJD_TDB) 2460606.4369828454 0.00013633287505191238
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 344.4453632 decimal
DEC 38.674919 decimal
Host Star Metallicity 0.13 0.08 Kokori et al. 2023
Host Star log(g) 4.382 0.027 Log10(cgs) Kokori et al. 2023
Host Star Radius [R_Sun] 1.135 0.048 Sol Kokori et al. 2023
Host Star Effective Temperature [K] 5975.0 45.0 K Yalçınkaya et al. 2024
a/Rs 9.85 0.07 Kokori et al. 2023
eccentricity 0.0 Ment et al. 2018
inclination [degrees] 85.63 0.06 deg Kokori et al. 2023
omega [degrees] 253.1 2.0 deg Ment et al. 2018
orbital period [days] 4.46530031 1.8e-07 day Yalçınkaya et al. 2024
Rp 14.53 0.65 R_Earth ExoFOP-TESS TOI
Rp/Rs 0.1202 0 ExoFOP-TESS TOI
ephemeris [JD] 2454363.94778 0.00013 BJD-TDB Yalçınkaya et al. 2024

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2453979.931896667 0.00024333333333333333 BJD, BJD-TDB Bonomo et al. 2017, Turner et al. 2016, Nikolov et al. 2014
2453984.397 0.009 HJD Bakos et al. 2007
2454363.94717 0.00042500000000000003 BJD-TDB, HJD Yalçınkaya et al. 2024, Johnson et al. 2008
2454381.80898 0.00021 BJD-TDB Ivshina & Winn 2022
2455801.7739 0.00018 BJD-TDB Kokori et al. 2022
2456114.345307 0.00018 JD Wakeford et al. 2013
2456476.03405 0.00019 BJD-TDB Kokori et al. 2023
2460606.436882 0.0001642 BJD ExoFOP-TESS TOI

Observations

Light curve chart for 0000577
Parameter Value Uncertainty
Am1 1.6667 0.0077
Am2 -0.48 0.19
a/Rs 9.501 0.099
Rp/Rs 0.181 0.035
ephemeris [JD] 2458467.5628 0.0045
eccentricity 0.0
inclination [degrees] 85.63
omega [degrees] 253.1
orbital period [days] 4.46530031
u0 2.0722908336580734
u1 -3.7864655203678437
u2 4.311935700692088
u3 -1.5977609497294698
duration 0.1348 0.0048
Not 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 MWAA (collaborate/publish)
Light curve chart for a1cb97d7efbd1d4e84e3b0df87693706
Parameter Value Uncertainty
Am1 1.0004 0.0015
Am2 0
a/Rs 9.912 0.058
Rp/Rs 0.07224 0.00078
ephemeris [JD] 2459833.94212 0.00057
eccentricity 0.0
inclination [degrees] 85.63
omega [degrees] 253.1
orbital period [days] 4.46530031
u0 2.7323396051217768
u1 -4.924897625205166
u2 4.905093835779986
u3 -1.7125357426050019
duration 0.1093 0.0013
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
I Cousins I 721.0 nm 875.0 nm
Organization Observer Code Secondary Observers
EPW TESS (collaborate/publish)
Light curve chart for 53645faa9d2fba9bff66ae552c040d03
Parameter Value Uncertainty
Am1 0.9999 0.0014
Am2 0
a/Rs 9.914 0.054
Rp/Rs 0.07147 0.00074
ephemeris [JD] 2459847.3358 0.00055
eccentricity 0.0
inclination [degrees] 85.63
omega [degrees] 253.1
orbital period [days] 4.46530031
u0 2.7328903156137065
u1 -4.926249929490521
u2 4.9063786150013176
u3 -1.713018928013764
duration 0.1093 0.0012
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
I Cousins I 721.0 nm 875.0 nm
Organization Observer Code Secondary Observers
EPW TESS (collaborate/publish)
Light curve chart for 455d243772bd2590ccfe9ed1d2db8ed7
Parameter Value Uncertainty
Am1 1.0 0.0015
Am2 0
a/Rs 9.829 0.061
Rp/Rs 0.06958 0.00078
ephemeris [JD] 2459851.80193 0.00061
eccentricity 0.0
inclination [degrees] 85.63
omega [degrees] 253.1
orbital period [days] 4.46530031
u0 2.731745855143191
u1 -4.9222352727964
u2 4.901479938879087
u3 -1.7109904481881353
duration 0.1109 0.0014
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
I Cousins I 721.0 nm 875.0 nm
Organization Observer Code Secondary Observers
EPW TESS (collaborate/publish)
Light curve chart for f1a22e1eb586f2873a44f93233099dbb
Parameter Value Uncertainty
Am1 1.0 0.0014
Am2 0
a/Rs 9.83 0.061
Rp/Rs 0.07035 0.00072
ephemeris [JD] 2459842.87127 0.0006
eccentricity 0.0
inclination [degrees] 85.63
omega [degrees] 253.1
orbital period [days] 4.46530031
u0 2.7322525732285388
u1 -4.92396293861135
u2 4.903586877414739
u3 -1.7118764389627894
duration 0.111 0.0014
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
I Cousins I 721.0 nm 875.0 nm
Organization Observer Code Secondary Observers
EPW TESS (collaborate/publish)
Light curve chart for d2b6758b269418c2a992c197b1c6df91
Parameter Value Uncertainty
Am1 1.0001 0.0014
Am2 0
a/Rs 9.776 0.067
Rp/Rs 0.0705 0.00079
ephemeris [JD] 2459829.47444 0.00064
eccentricity 0.0
inclination [degrees] 85.63
omega [degrees] 253.1
orbital period [days] 4.46530031
u0 2.7321944664309767
u1 -4.923574665503667
u2 4.903009090578886
u3 -1.7116288184456674
duration 0.1122 0.0015
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
I Cousins I 721.0 nm 875.0 nm
Organization Observer Code Secondary Observers
EPW TESS (collaborate/publish)
Light curve chart for 759a555ca2ca9c953d687ab471edce6e
Parameter Value Uncertainty
Am1 0.9995 0.0014
Am2 0
a/Rs 9.884 0.06
Rp/Rs 0.07075 0.00082
ephemeris [JD] 2459838.40552 0.00059
eccentricity 0.0
inclination [degrees] 85.63
omega [degrees] 253.1
orbital period [days] 4.46530031
u0 2.7324370629606074
u1 -4.92425394607462
u2 4.903696857490836
u3 -1.7118799013060455
duration 0.1098 0.0014
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
I Cousins I 721.0 nm 875.0 nm
Organization Observer Code Secondary Observers
EPW TESS (collaborate/publish)