exoclock

HAT-P-54b (LOW)

Discovered by: Bakos et al. 2015

The Star
Simbad
GAIA
2MASS		 HAT-P-54
DR2 3383298227579280640
J06393552+2528571
RA 06:39:35.5182 DEC +25:28:57.157
Parallax
6.933 mas		 P.M. RA
-0.073 mas/y		 P.M. DEC
-33.237 mas/y
MagV
13.505		 MagR*
12.752		 MagI*
12.062		 MagJ
11.145		 MagH
10.487		 MagK
10.326
MagG
13.017		 MagGBP
13.797		 MagGRP
12.181
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2458845.206425 ± 8.7e-05 BJDTDB
Period
3.79985273 ± 2.9e-07 days
Transit Parameters
Bakos et al. 2015
Rp/Rs
0.1572 ± 0.002		 a/Rs
14.34 +0.22 -0.22
 i
87.04 +0.08 -0.08 deg
e
-		 ω
- deg
DepthR*
27.05 mmag		 Duration*
1.8 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Bakos et al. 2015
Teff
4390.0 +50.0 -50.0 K
 Log(g)
4.67 +0.01 -0.01 cm/s2
 Fe/H
-0.13 +0.08 -0.08 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 7.26"
Total Observations (Recent) 127 (10)
O-C 0.59 ± 0.17 minutes
ExoClock Observations (Recent) 82 (10)
Space Observations (Recent) 36 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 9 (0)
Kepler Rp/Rs 0.16293 ± 0.00088
TESS Rp/Rs 0.15922 ± 0.00065

HAT-P-54b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
HAT-P-54b (LOW)
2025-11-05		Alvaro Fornas
MPC J57. Centro Astronómico Alto Turia		Planewave CDK 17
QHY600M / Lum / 180.0		1.97 ± 0.92
HAT-P-54b (LOW)
2025-02-15		Riccardo Zancan
Riccardo		Celestron C11
ASI-1600-MM / R / 90.0		5.8 ± 1.58
HAT-P-54b (LOW)
2025-02-15		Tommaso Dittadi
TD-TRO		Ritchey-Chretien
Moravian G2-1600 / R / 180.0		2.03 ± 0.81
HAT-P-54b (LOW)
2025-02-15		Ulisse Quadri
Bassano Bresciano Obs.		Telescopio 250 mm
CCD Starlight Xpress Trius / Clear / 60.0		0.01 ± 1.32
HAT-P-54b (LOW)
2025-01-16		Bryan Martin
Tiger Butte Observatory Remote		AG Optical IDK
ZWO ASI 294 / R / 180.0		2.95 ± 2.59
HAT-P-54b (LOW)
2024-12-20		Claudio Lopresti
Claudio Lopresti		Mak-Newton
CCD Sbig ST10xme / R / 240.0		0.46 ± 2.59
HAT-P-54b (LOW)
2024-12-13		Jean-Pascal Vignes
Deep Sky Chile		Planewave CDK400
QHYCCD 600M / Lum / 90.0		-2.88 ± 0.73
HAT-P-54b (LOW)
2024-12-09		Bryan Martin
Tiger Butte Observatory Remote		AG Optical IDK
ZWO ASI 294 / Lum / 180.0		2.99 ± 1.44
HAT-P-54b (LOW)
2024-11-28		Javier Alonso Santiago
INAF-OACT		Cassegrain 91cm
Moravian C4-1600EC / R / 45.0		1.3 ± 0.24
HAT-P-54b (LOW)
2024-11-24		Jean-Pascal Vignes
Deep Sky Chile		PlaneWave CDK 17"
QHYCCD 600 M / Lum / 90.0		1.69 ± 0.86
HAT-P-54b (LOW)
2024-03-07		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-2.07 ± 0.76
HAT-P-54b (LOW)
2024-03-03		Charles Miller
Miller Observatory		Meade 12" LX850
QHY268M / R / 90.0		-0.28 ± 1.38
HAT-P-54b (LOW)
2024-02-01		Sacha Foschino
Observatoire des Baronnies Provençales		Planewave 430mm
SVO ASI 6200 MM Pro / R / 120.0		-3.31 ± 1.73
HAT-P-54b (LOW)
2024-01-13		Jean-Marc Beraud
Observatoire La tondeuse		Newton 410mm
ASI2400MC / Clear / 240.0		0.09 ± 2.88
HAT-P-54b (LOW)
2024-01-13		Fabio Mortari
Hypatia Observatory		Ritchey Chretienne 250mm f/5.3
MORAVIAN C2-7000A / R / 230.0		-0.05 ± 1.73
HAT-P-54b (LOW)
2024-01-10		Pieter Vuylsteke
TheGardenToTheSkyFacility		TS ONTC 25cm f4.7
QHY 268M / rpr / 120.0		-1.03 ± 1.11
HAT-P-54b (LOW)
2024-01-10		Simon Dawes
William James II		Celestron Edge11 HD
Risingcam Monochrome SONY imx571 / Lum / 300.0		-1.63 ± 0.88
HAT-P-54b (LOW)
2023-12-25		Attilio Bruzzone
Anxanum Observatory		LX200 ACF 10"
QHY 268M / Lum / 120.0		3.05 ± 1.31
HAT-P-54b (LOW)
2023-12-22		Fabio Mortari
Hypatia Observatory		Ritchey Chretienne 250mm f/5.3
MORAVIAN C2-7000A / R / 200.0		0.83 ± 1.58
HAT-P-54b (LOW)
2023-12-06		Stefano Lora
MarSEC		Ritchey Chrétien
Moravian G2 Mark II / R / 120.0		3.01 ± 1.87
HAT-P-54b (LOW)
2023-11-14		Esteban Reina
Observatori de Masquefa		Meade LX200
ZWO ASI 294 MM Pro / R / 120.0		-0.28 ± 1.73
HAT-P-54b (LOW)
2023-10-07		Javier Alonso Santiago
INAF-OACT		Cassegrain 91cm
Moravian C4-1600EC / R / 60.0		1.2 ± 1.58
HAT-P-54b (LOW)
2023-10-07		Eric Miny
BLOIS SOLOGNE ASTRONOMIE OBSERVATORY		Newton T305
QSI 683WS / Lum / 120.0		-5.14 ± 2.3
HAT-P-54b (LOW)
2023-04-03		Stephen Futcher
Hampshire Astronomical Group, Clanfield		Orion Optics AG16
Altair 294C / Lum / 120.0		1.81 ± 1.27
HAT-P-54b (LOW)
2023-04-03		Alessandro Marchini
Astronomical Observatory University of Siena		Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 300.0		0.62 ± 1.44
HAT-P-54b (LOW)
2023-03-15		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave 2
ZWO ASI6200 / Clear / 120.0		1.83 ± 0.79
HAT-P-54b (LOW)
2023-03-15		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		-0.03 ± 2.59
HAT-P-54b (LOW)
2023-02-24		Miguel Ángel Álava Amat
Sarriguren		Meade SC 8"
Asi 1600 MM / Lum / 240.0		0.06 ± 1.58
HAT-P-54b (LOW)
2023-02-05		Adam Popowicz
Otivar dome2		Newton 12" ASA
ASI ZWO 1600MM / R / 202.0		-2.15 ± 1.73
HAT-P-54b (LOW)
2023-01-17		Snaevarr Guðmundsson
Ness Observatory		Meade LX 200 ACF Schmidt-Cassegrain
SBIG STL 11000M / R / 90.0		-1.45 ± 0.98
HAT-P-54b (LOW)
2023-01-17		Trevor Gainey
Kismet		Meade LX200
ZWO ASI 294 MC Pro / R / 240.0		-2.08 ± 1.07
HAT-P-54b (LOW)
2022-12-29		David Wright
Yorick (private observatory)		10" Ritchey-Chretien
QSI 683WSG-8 / Lum / 130.0		0.28 ± 1.2
HAT-P-54b (LOW)
2022-12-29		Adrian Sonka
Bucharest Observatory		Ritchey Chretien
PROLINE PL 16803 / Clear / 60.0		-1.36 ± 0.96
HAT-P-54b (LOW)
2022-12-22		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-0.82 ± 0.72
HAT-P-54b (LOW)
2022-10-11		Vincent Boucher
Observatoire de Saint-Véran Paul Felenbok		Astrosib RC500
SBIG STX-16803 / R / 180.0		-0.83 ± 1.34
HAT-P-54b (LOW)
2022-03-19		Mark Salisbury
POST		Orion Optics ODK
SBIG ST-10 XME / R / 240.0		1.14 ± 0.72
HAT-P-54b (LOW)
2022-03-19		Simon Dawes
William James II Observatory		Skywatcher MN190 2
ZWO ASI 1600MM-PRO USB 3.0 Mono Camera / Lum / 120.0		-0.3 ± 2.3
HAT-P-54b (LOW)
2022-02-28		Michael Irzyk
Melun		C14
H694 / Clear / 60.0		0.8 ± 0.72
HAT-P-54b (LOW)
2022-02-28		Yannic Delisle
Buthiers UAI 199		Custome made
SBIG ST-8300M/C / Clear / 30.0		-0.5 ± 0.86
HAT-P-54b (LOW)
2022-02-28		Valère Perroud
Observatoire de Duines		RC 10
Moravian G2-4000 / Lum / 120.0		-0.93 ± 2.02
HAT-P-54b (LOW)
2022-02-28		Marc Deldem
Les Barres Observatory		Celestron C8
SBIG ST8-XME / Clear / 180.0		-0.93 ± 1.44
HAT-P-54b (LOW)
2022-02-09		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 150.0		4.78 ± 1.87
HAT-P-54b (LOW)
2022-02-09		Fran Campos
Puig d'Agulles Observtory		RC14" on EQ8 German mount
SBIG ST-8XME / R / 180.0		0.31 ± 1.15
HAT-P-54b (LOW)
2022-02-09		Alessandro Marchini
Astronomical Observatory University of Siena		Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 300.0		-0.98 ± 1.3
HAT-P-54b (LOW)
2022-01-21		Cyrille Aumasson
observatory of Baronnies Provençales		ASTELCO 31.5"
FLI PL230 / R / 120.0		-0.03 ± 0.58
HAT-P-54b (LOW)
2021-12-11		David Arnot
OSO PIRATE		PlaneWave Instruments CDK24 24 inch (610 mm) f/6.5 Corrected Dall-Kirkham Astrograph
FLI ProLine KAF-16803 / R / 60.0		3.98 ± 1.01
HAT-P-54b (LOW)
2021-12-07		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-2.14 ± 0.86
HAT-P-54b (LOW)
2021-11-18		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		0.26 ± 1.01
HAT-P-54b (LOW)
2021-03-23		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / Clear / 120.0		3.89 ± 1.3
HAT-P-54b (LOW)
2021-03-23		Mario Morales-Aimar
Observatorio de Sencelles MPC K14		Reflector 10"
SBIG ST7-XME / Clear / 180.0		-2.3 ± 2.45
HAT-P-54b (LOW)
2021-03-20		Paul Benni
Acton Sky Portal		C11 EdgeHD
SBIG ST8XME / AstrodonExoPlanet-BB / 40.0		-0.64 ± 1.01
HAT-P-54b (LOW)
2021-03-04		Antonio Marino
UAN c/o INAF-Osservatorio Astronomico di Capodimonte, Naples ITALY		MEADE
CCD Atik 383L / R / 120.0		3.26 ± 3.46
HAT-P-54b (LOW)
2021-03-01		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		2.47 ± 1.01
HAT-P-54b (LOW)
2021-02-10		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		0.98 ± 0.72
HAT-P-54b (LOW)
2021-01-22		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		2.22 ± 2.3
HAT-P-54b (LOW)
2021-01-14		Taewoo Kim
Deokheung Optical Astronomy Observatory		NYSC 1m Telescope
FLI PL-16803 or PI SOPHIA-2048B / R / 120.0		0.93 ± 0.43
HAT-P-54b (LOW)
2021-01-06		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / U / 120.0		1.66 ± 0.86
HAT-P-54b (LOW)
2020-12-11		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		0.75 ± 0.72
HAT-P-54b (LOW)
2020-11-22		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-1.17 ± 0.58
HAT-P-54b (LOW)
2020-11-07		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		-0.72 ± 0.72
HAT-P-54b (LOW)
2020-10-26		Taewoo Kim
Deokheung Optical Astronomy Observatory		NYSC 1m Telescope
FLI PL-16803 or PI SOPHIA-2048B / R / 120.0		-0.21 ± 0.43
HAT-P-54b (LOW)
2020-10-19		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		0.52 ± 0.72
HAT-P-54b (LOW)
2020-03-27		John Savage
Z42 Rushay Farm Observatory		Celeston 14Edge with focal reducer
ATIK One 9.0 / R / 240.0		2.03 ± 1.01
HAT-P-54b (LOW)
2020-03-27		Geoffrey Thurston
I67		Celestron C-14
Atik 314L+ / R / 240.0		-1.57 ± 1.3
HAT-P-54b (LOW)
2020-03-27		Danilo Sedita
Osservatorio Sedita Castrofilippo		RC GSO 14"
Moravian G2-1600 / R / 90.0		-2.87 ± 1.58
HAT-P-54b (LOW)
2020-03-08		Alberto Tomatis
Alto-Observatory		RC
STL 6303 / Lum / 120.0		-0.61 ± 2.74
HAT-P-54b (LOW)
2020-02-26		Wonseok Kang
Deokheung Optical Astronomy Observatory		NYSC 1m Telescope
FLI PL-16803 or PI SOPHIA-2048B / R / 90.0		-1.54 ± 0.58
HAT-P-54b (LOW)
2020-02-22		Vikrant Kumar Agnihotri
Cepheid Observatory India		C11-A XLT Schmidt-Cassegrain/F5.12
Atik414ex mono / AstrodonExoPlanet-BB / 45.0		-0.74 ± 1.01
HAT-P-54b (LOW)
2020-02-18		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		-0.09 ± 1.01
HAT-P-54b (LOW)
2020-02-18		Alessandro Nastasi
Galhassin Robotic Telescope 1 (GRT1)		Officina Stellare RiLa 400
FLI ProLine 16803 / Lum / 40.0		-0.52 ± 0.72
HAT-P-54b (LOW)
2020-01-30		Dim Stouraitis
Galilaios		SCT
SXVF-H9 Starlight-Xpress / R / 60.0		-0.29 ± 1.44
HAT-P-54b (LOW)
2020-01-27		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		3.82 ± 0.86
HAT-P-54b (LOW)
2020-01-11		Claudio Lopresti
Claudio Lopresti		Mak-Newton
CCD Sbig ST10xme / Clear / 240.0		0.09 ± 3.17
HAT-P-54b (LOW)
2020-01-04		Martin Fowler
MicroObservatory Cecilia		MicroObservatory robotic telescope
KAF 1402ME / Clear / 60.0		-1.63 ± 5.76
HAT-P-54b (LOW)
2019-12-23		Alessandro Marchini
Astronomical Observatory University of Siena		Mak-Cas 0.3m f/5.6
Sbig STL-6303 / I / 300.0		0.04 ± 1.3
HAT-P-54b (LOW)
2019-10-05		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		2.21 ± 0.72
HAT-P-54b (LOW)
2019-02-22		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		-0.08 ± 0.72
HAT-P-54b (LOW)
2019-02-03		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		2.17 ± 0.86
HAT-P-54b (LOW)
2019-01-15		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		-0.18 ± 0.86
HAT-P-54b (LOW)
2019-01-12		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		0.61 ± 1.01
HAT-P-54b (LOW)
2018-12-27		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		0.05 ± 0.58
HAT-P-54b (LOW)
2018-12-05		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		1.95 ± 1.01

Space Observations
Planet
Observation Date		 Mission O-C
minutes
HAT-P-54b (LOW)
2023-12-06		TESS-0.88 ± 0.98
HAT-P-54b (LOW)
2023-12-03		TESS-1.44 ± 0.86
HAT-P-54b (LOW)
2023-11-29		TESS-0.6 ± 0.86
HAT-P-54b (LOW)
2023-11-21		TESS0.64 ± 0.89
HAT-P-54b (LOW)
2023-11-14		TESS0.17 ± 1.02
HAT-P-54b (LOW)
2023-11-10		TESS-2.05 ± 0.99
HAT-P-54b (LOW)
2023-11-06		TESS-2.03 ± 1.02
HAT-P-54b (LOW)
2023-11-02		TESS0.84 ± 0.91
HAT-P-54b (LOW)
2023-10-26		TESS1.18 ± 0.92
HAT-P-54b (LOW)
2023-10-22		TESS-1.13 ± 1.01
HAT-P-54b (LOW)
2023-10-18		TESS-1.11 ± 0.95
HAT-P-54b (LOW)
2021-11-29		TESS0.42 ± 0.86
HAT-P-54b (LOW)
2021-11-25		TESS-1.71 ± 0.86
HAT-P-54b (LOW)
2021-11-22		TESS0.81 ± 0.96
HAT-P-54b (LOW)
2021-11-18		TESS-1.2 ± 0.88
HAT-P-54b (LOW)
2021-11-14		TESS0.0 ± 0.84
HAT-P-54b (LOW)
2021-11-10		TESS-0.5 ± 0.94
HAT-P-54b (LOW)
2021-11-03		TESS1.35 ± 0.75
HAT-P-54b (LOW)
2021-10-30		TESS-0.23 ± 0.76
HAT-P-54b (LOW)
2021-10-22		TESS-1.17 ± 0.84
HAT-P-54b (LOW)
2021-10-18		TESS0.75 ± 0.96
HAT-P-54b (LOW)
2021-10-15		TESS0.12 ± 0.79
HAT-P-54b (LOW)
2021-10-07		TESS-1.34 ± 1.09
HAT-P-54b (LOW)
2021-10-03		TESS0.66 ± 0.86
HAT-P-54b (LOW)
2021-09-29		TESS-1.87 ± 1.02
HAT-P-54b (LOW)
2021-09-26		TESS0.18 ± 1.04
HAT-P-54b (LOW)
2021-09-22		TESS-0.66 ± 1.01
HAT-P-54b (LOW)
2021-09-18		TESS-1.38 ± 0.94
HAT-P-54b (LOW)
2014-05-27		K20.51 ± 0.78
HAT-P-54b (LOW)
2014-05-19		K22.51 ± 0.79
HAT-P-54b (LOW)
2014-05-11		K2-0.37 ± 1.07
HAT-P-54b (LOW)
2014-05-08		K20.32 ± 0.76
HAT-P-54b (LOW)
2014-05-04		K20.53 ± 0.43
HAT-P-54b (LOW)
2014-04-30		K20.42 ± 1.24
HAT-P-54b (LOW)
2014-04-26		K2-0.56 ± 0.79
HAT-P-54b (LOW)
2014-04-22		K2-0.84 ± 0.58

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2020-02-22 Saha et al. 2021 -0.89 ± 0.44
2020-02-03 Saha et al. 2021 -0.57 ± 0.63
2020-02-03 Saha et al. 2021 -0.64 ± 0.61
2017-03-29 Wang et al. 2021 -1.36 ± 1.27
2017-02-19 Wang et al. 2021 -0.83 ± 3.17
2016-02-24 Wang et al. 2021 1.34 ± 1.01
2016-02-05 Wang et al. 2021 0.31 ± 0.63
2016-02-05 Wang et al. 2021 -0.29 ± 1.73
2013-01-06 Bakos et al. 2015 -0.89 ± 0.35
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