exoclock

HAT-P-4b (LOW)

Discovered by: Kovács et al. 2007

The Star
Simbad
GAIA
2MASS		 BD+36 2593
DR2 1291120362349158016
J15195792+3613467
RA 15:19:57.9205 DEC +36:13:46.737
Parallax
3.092 mas		 P.M. RA
-21.661 mas/y		 P.M. DEC
-24.25 mas/y
MagV
11.12		 MagR*
10.848		 MagI*
10.443		 MagJ
10.1		 MagH
9.837		 MagK
9.77
MagG
11.063		 MagGBP
11.39		 MagGRP
10.605
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2455584.57238 ± 0.00018 BJDTDB
Period
3.05652301 ± 2.9e-07 days
Transit Parameters
Christiansen et al. 2011
Rp/Rs
0.086 ± 0.008		 a/Rs
6.0 +0.3 -0.3
 i
89.7 +0.3 -0.3 deg
e
-		 ω
- deg
DepthR*
9.84 mmag		 Duration*
4.25 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Torres et al. 2008
Teff
5860.0 +80.0 -80.0 K
 Log(g)
4.36 +0.11 -0.11 cm/s2
 Fe/H
0.24 +0.08 -0.08 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.11"
Total Observations (Recent) 43 (4)
O-C 0.02 ± 0.51 minutes
ExoClock Observations (Recent) 24 (4)
Space Observations (Recent) 5 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 14 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.08495 ± 0.00055

HAT-P-4b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
HAT-P-4b (LOW)
2024-05-13		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280/1850 (C11 with Starizona reducer)
Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 120.0		-0.43 ± 1.22
HAT-P-4b (LOW)
2024-04-10		Bryan Martin
Tiger Butte Observatory Remote		AG Optical IDK
ZWO ASI 294 / R / 120.0		-4.34 ± 4.46
HAT-P-4b (LOW)
2024-04-01		Anthony David Starkie
OSO COAST		PlaneWave CDK17
FLI ProLine KAF-09000 / R / 70.0		-1.07 ± 1.58
HAT-P-4b (LOW)
2024-03-22		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		1.62 ± 5.76
HAT-P-4b (LOW)
2023-06-28		Jean-Bernard Pioppa
La Roque-Esclapon		KEPLER
ATIK 383 L+ / R / 240.0		5.11 ± 3.31
HAT-P-4b (LOW)
2023-05-03		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280/1850 (C11 with Starizona reducer)
Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 120.0		-0.31 ± 0.91
HAT-P-4b (LOW)
2023-04-30		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / R / 90.0		2.57 ± 2.02
HAT-P-4b (LOW)
2023-03-16		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280/1850 (C11 with Starizona reducer)
Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 120.0		0.19 ± 0.91
HAT-P-4b (LOW)
2022-06-13		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / R / 90.0		2.88 ± 1.58
HAT-P-4b (LOW)
2022-06-13		Stephen M. Brincat
Flarestar Observatory - MPC Code:171		Meade SCT
Moravian G2-1600 / Clear / 120.0		0.0 ± 2.3
HAT-P-4b (LOW)
2022-06-10		Gianfranco Ferrini
K83		Meade
Sbig St8XME / Clear / 110.0		-1.26 ± 2.16
HAT-P-4b (LOW)
2022-04-19		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		0.46 ± 1.15
HAT-P-4b (LOW)
2022-04-16		Leon Bewersdorff
Observatory Kipshoven (BLEW)		GSO Ritchey-Chrétien
QHY268M-PH / V / 140.0		-1.81 ± 4.32
HAT-P-4b (LOW)
2021-04-05		Simon Dawes
William James II Observatory		Skywatcher MN190 2
ZWO ASI 1600MM-PRO USB 3.0 Mono Camera / R / 60.0		5.0 ± 2.59
HAT-P-4b (LOW)
2021-04-05		David Wright
Yorick (private observatory)		10" Ritchey-Chretien
QSI 683WSG-8 / R / 90.0		-1.48 ± 2.45
HAT-P-4b (LOW)
2021-04-05		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 60.0		-1.77 ± 2.3
HAT-P-4b (LOW)
2020-07-07		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave
SBIG STL11K / Clear / 120.0		-3.0 ± 3.17
HAT-P-4b (LOW)
2020-03-26		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		1.59 ± 1.87
HAT-P-4b (LOW)
2020-03-26		John Savage
Z42 Rushay Farm Observatory		Celeston 14Edge with focal reducer
ATIK One 9.0 / R / 90.0		-2.45 ± 3.02
HAT-P-4b (LOW)
2019-03-16		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave
SBIG STL11K / V / 120.0		3.93 ± 3.17
HAT-P-4b (LOW)
2018-04-19		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		0.74 ± 1.73
HAT-P-4b (LOW)
2018-04-19		Alessandro Marchini
Astronomical Observatory University of Siena		Mak-Cas 0.3m f/5.6
Sbig STL-6303 / I / 180.0		0.31 ± 3.46
HAT-P-4b (LOW)
2015-06-27		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / V / 120.0		1.94 ± 1.3
HAT-P-4b (LOW)
2014-04-16		Claudio Lopresti
Claudio Lopresti		Mak-Newton
CCD Sbig ST10xme / R / 240.0		5.38 ± 5.76

Space Observations
Planet
Observation Date		 Mission O-C
minutes
HAT-P-4b (LOW)
2020-05-10		TESS-0.97 ± 1.01
HAT-P-4b (LOW)
2020-05-07		TESS1.4 ± 0.98
HAT-P-4b (LOW)
2020-05-04		TESS-0.65 ± 1.15
HAT-P-4b (LOW)
2020-04-25		TESS0.58 ± 1.15
HAT-P-4b (LOW)
2020-04-22		TESS-1.09 ± 0.96

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2016-03-13 Wang et al. 2021 2.29 ± 1.58
2010-03-29 Winn et al. 2011 -0.25 ± 1.05
2008-07-07 Christiansen et al. 2011 -0.31 ± 0.94
2008-07-04 Christiansen et al. 2011 -2.28 ± 0.94
2008-07-01 Christiansen et al. 2011 0.94 ± 0.92
2008-02-12 Christiansen et al. 2011 0.23 ± 0.81
2008-02-09 Christiansen et al. 2011 1.52 ± 1.18
2008-02-06 Christiansen et al. 2011 -1.33 ± 0.81
2008-02-03 Christiansen et al. 2011 -2.46 ± 1.01
2008-01-30 Christiansen et al. 2011 0.58 ± 0.81
2008-01-27 Christiansen et al. 2011 -0.86 ± 0.88
2008-01-24 Christiansen et al. 2011 -2.8 ± 1.04
2007-05-28 Kovács et al. 2007 0.68 ± 0.86
2007-05-25 Kovács et al. 2007 1.15 ± 0.43
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