results

HAT-P-53 b

Total Reductions to Date: 8

Date Processed: 05/30/2025 at 07:00:33 (PDT)

Exoplanet Watch Ephemeris

Parameter	Value	Uncertainty
Orbital Period (Days)	1.9616248714609836	3.310705484054182e-07
Ephemeris (BJD_TDB)	2460252.9126313636	0.0004407193707534507

Assumed Priors

Parameter	Value	Uncertainty	Units	Reference
RA	21.8711012		decimal
DEC	38.9681137		decimal
Host Star Metallicity	0.0	0.08		Kokori et al. 2023
Host Star log(g)	4.31	0.043	Log10(cgs)	Kokori et al. 2023
Host Star Radius [R_Sun]	1.209	0.081	Sol	Kokori et al. 2023
Host Star Effective Temperature [K]	5956.0	50.0	K	Yalçınkaya et al. 2024
a/R_s	5.6	0.3		Kokori et al. 2023
eccentricity	0.085			Bonomo et al. 2017
inclination [degrees]	86.2	1.5	deg	Kokori et al. 2023
omega [degrees]	0.0		deg	Yalçınkaya et al. 2024
orbital period [days]	1.96162529	3.5e-07	day	Yalçınkaya et al. 2024
R_p	12.9	1.02	R_Earth	ExoFOP-TESS TOI
R_p/R_s	0.1172	0		ExoFOP-TESS TOI
ephemeris [JD]	2458771.88605	0.00028	BJD-TDB	Yalçınkaya et al. 2024

Previously Published Mid-Transit Times

Value	Uncertainty	Units	Reference
2455829.4481929997	0.00044	BJD-TDB, BJD-UTC	Bonomo et al. 2017, Hartman et al. 2015
2457502.7149	0.0003	BJD-TDB	Kokori et al. 2022
2457898.96242	0.00039	BJD-TDB	Kokori et al. 2023
2458771.88605	0.00028	BJD-TDB	Yalçınkaya et al. 2024
2458785.619295	0.0015216	BJD	ExoFOP-TESS TOI

Observations

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Parameter	Value	Uncertainty
Am1	0.9994	0.0057
Am2	0.0016	0.0031
a/R_s	5.39	0.14
R_p/R_s	0.1346	0.0051
ephemeris [JD]	2459434.9123	0.0015
eccentricity	0.085
inclination [degrees]	86.2
omega [degrees]	0.0
orbital period [days]	1.96162529
u0	2.638205075934742
u1	-4.720742145904303
u2	4.744276661807774
u3	-1.661739521142981
duration	0.1255	0.0037

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
SI	Sloan i	697.5 nm	827.5 nm

Organization	Observer Code	Secondary Observers
AAVSO	LNWA (collaborate/publish)	BPAG

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Parameter	Value	Uncertainty
Am1	1.674	0.052
Am2	-0.537	0.059
a/R_s	7.07	0.24
R_p/R_s	0.2343	0.0053
ephemeris [JD]	2459550.6495	0.0037
eccentricity	0.085
inclination [degrees]	86.2
omega [degrees]	0.0
orbital period [days]	1.96162529
u0	2.4779402670284325
u1	-4.453297148841499
u2	4.624250095400591
u3	-1.6488931446808293
duration	0.1014	0.0042

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)

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Parameter	Value	Uncertainty
Am1	0.8674	0.0061
Am2	0.136	0.055
a/R_s	5.15	0.29
R_p/R_s	0.1615	0.0074
ephemeris [JD]	2459846.8414	0.0037
eccentricity	0.085
inclination [degrees]	86.2
omega [degrees]	0.0
orbital period [days]	1.96162529
u0	2.742576195708661
u1	-4.931708061082621
u2	4.8916102981511465
u3	-1.7024783598865132
duration	0.1166	0.0056

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
AAVSO	LPAC (collaborate/publish)

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Parameter	Value	Uncertainty
Am1	1.042	0.029
Am2	-0.039	0.029
a/R_s	4.1	0.21
R_p/R_s	0.143	0.017
ephemeris [JD]	2459850.7695	0.0047
eccentricity	0.085
inclination [degrees]	86.2
omega [degrees]	0.0
orbital period [days]	1.96162529
u0	2.071994999092654
u1	-3.7645538713508975
u2	4.276351348182605
u3	-1.5837924122017606
duration	0.1712	0.0099

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	NANF (collaborate/publish)

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Parameter	Value	Uncertainty
Am1	0.988	0.019
Am2	0.0108	0.0075
a/R_s	4.79	0.74
R_p/R_s	0.094	0.016
ephemeris [JD]	2459852.7297	0.0063
eccentricity	0.085
inclination [degrees]	86.2
omega [degrees]	0.0
orbital period [days]	1.96162529
u0	2.4773643654090316
u1	-4.450690408983129
u2	4.620822673419622
u3	-1.647496560989901
duration	0.137	0.026

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	NANF (collaborate/publish)

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Parameter	Value	Uncertainty
Am1	1.0002	0.0075
Am2	-0.0003	0.0026
a/R_s	5.85	0.32
R_p/R_s	0.1109	0.0052
ephemeris [JD]	2459897.858	0.0028
eccentricity	0.085
inclination [degrees]	86.2
omega [degrees]	0.0
orbital period [days]	1.96162529
u0	1.828302116306659
u1	-3.1933589014369166
u2	3.798392826165626
u3	-1.4333359844349043
duration	0.1116	0.0068

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)

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Parameter	Value	Uncertainty
Am1	1.032	0.0089
Am2	-0.0172	0.0026
a/R_s	5.83	0.72
R_p/R_s	0.106	0.013
ephemeris [JD]	2460152.8671	0.007
eccentricity	0.085
inclination [degrees]	86.2
omega [degrees]	0.0
orbital period [days]	1.96162529
u0	2.0720618517607803
u1	-3.7650094368568583
u2	4.276989000726467
u3	-1.584041351898286
duration	0.112	0.017

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)

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Parameter	Value	Uncertainty
Am1	0.9947	0.007
Am2	0.0043	0.0026
a/R_s	5.37	0.29
R_p/R_s	0.1193	0.0069
ephemeris [JD]	2460252.9122	0.0031
eccentricity	0.085
inclination [degrees]	86.2
omega [degrees]	0.0
orbital period [days]	1.96162529
u0	2.4152308751135982
u1	-4.2687185079194885
u2	4.431263834888135
u3	-1.5777761360512685
duration	0.124	0.0078