exoclock

HAT-P-28b (LOW)

Discovered by: Buchhave et al. 2011

The Star
Simbad
GAIA
2MASS		 HAT-P-28
DR2 363702817083391232
J00520018+3443422
RA 00:52:00.1877 DEC +34:43:42.203
Parallax
2.463 mas		 P.M. RA
25.519 mas/y		 P.M. DEC
2.859 mas/y
MagV
13.03		 MagR
13.24		 MagI*
12.142		 MagJ
11.561		 MagH
11.206		 MagK
11.104
MagG
12.872		 MagGBP
13.3		 MagGRP
12.275
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2458134.11472 ± 0.0003 BJDTDB
Period
3.25721296 ± 8e-07 days
Transit Parameters
Buchhave et al. 2011
Rp/Rs
0.113 ± 0.0024		 a/Rs
8.4 +0.6 -0.6
 i
88.0 +0.9 -0.9 deg
e
0.05 +0.03 -0.03
 ω
233.0 +90.0 -90.0 deg
DepthR*
16.75 mmag		 Duration*
3.31 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Buchhave et al. 2011
Teff
5680.0 +90.0 -90.0 K
 Log(g)
4.36 +0.06 -0.06 cm/s2
 Fe/H
0.12 +0.08 -0.08 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 8.59"
Total Observations (Recent) 29 (4)
O-C -0.9 ± 0.42 minutes
ExoClock Observations (Recent) 28 (4)
Space Observations (Recent) 0 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 1 (0)
Kepler Rp/Rs -
TESS Rp/Rs -

HAT-P-28b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
HAT-P-28b (LOW)
2024-11-17		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 180.0		0.63 ± 1.87
HAT-P-28b (LOW)
2024-08-31		Yen-Hsing Lin
Starry House Observatory		Mewlon 300 CRS
ASI 6200MM Pro / Lum / 60.0		-5.4 ± 1.58
HAT-P-28b (LOW)
2023-12-11		Snaevarr Guðmundsson
Ness Observatory		Meade LX 200 ACF Schmidt-Cassegrain
SBIG STL 11000M / AstrodonExoPlanet-BB / 120.0		0.23 ± 1.14
HAT-P-28b (LOW)
2023-11-28		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 200.0		-1.36 ± 2.45
HAT-P-28b (LOW)
2023-11-15		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave 2
ZWO ASI6200 / V / 120.0		0.5 ± 1.37
HAT-P-28b (LOW)
2023-11-15		Marco Stefanini
Osservatorio Aldebaran		Celestron C14
QHY294M Pro / Lum / 150.0		-0.86 ± 1.58
HAT-P-28b (LOW)
2023-11-15		Mark Salisbury
POST		Orion Optics ODK
SBIG ST-10 XME / Clear / 240.0		-2.54 ± 0.91
HAT-P-28b (LOW)
2023-10-14		Charles Miller
Miller Observatory		Meade 12" LX850
QHY268M / R / 60.0		2.78 ± 1.58
HAT-P-28b (LOW)
2023-09-14		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280/1850 (C11 with Starizona reducer)
Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 120.0		-0.58 ± 1.37
HAT-P-28b (LOW)
2023-09-14		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / Clear / 240.0		-0.79 ± 1.73
HAT-P-28b (LOW)
2023-07-15		Gemma Domènech
Observatori Astronòmic Albanyà		Meade ACF F8
Moravian G4-9000 / I / 160.0		-0.15 ± 2.3
HAT-P-28b (LOW)
2022-12-08		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 200.0		-0.94 ± 1.41
HAT-P-28b (LOW)
2022-10-07		Marco Bastoni
Bellatrix		GSO RC 10''
Moravian G3-16200 / Lum / 300.0		-0.99 ± 4.32
HAT-P-28b (LOW)
2022-07-25		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 180.0		1.17 ± 1.3
HAT-P-28b (LOW)
2022-01-13		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 150.0		2.7 ± 2.59
HAT-P-28b (LOW)
2022-01-13		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 120.0		-1.62 ± 4.32
HAT-P-28b (LOW)
2021-10-17		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 200.0		0.9 ± 4.32
HAT-P-28b (LOW)
2020-11-13		Mike Miller
Georgetown Observatory		Meade 10 inch ACF f8 f5.6
QSI 540 / V / 120.0		2.55 ± 5.76
HAT-P-28b (LOW)
2020-09-22		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		-2.62 ± 1.15
HAT-P-28b (LOW)
2020-09-09		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		2.2 ± 0.86
HAT-P-28b (LOW)
2020-08-26		Dim Stouraitis
Galilaios		SCT
SXVF-H9 Starlight-Xpress / R / 70.0		0.12 ± 1.73
HAT-P-28b (LOW)
2019-12-03		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / Clear / 60.0		-2.81 ± 0.86
HAT-P-28b (LOW)
2019-10-25		Nikolaos Paschalis
Nunki Observatory		Officina Stellare RILA 400
SBIG STXL 11002 / R / 60.0		0.43 ± 3.17
HAT-P-28b (LOW)
2019-10-02		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		1.57 ± 1.58
HAT-P-28b (LOW)
2018-12-26		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		1.3 ± 1.44
HAT-P-28b (LOW)
2018-10-12		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / Clear / 60.0		0.58 ± 0.58
HAT-P-28b (LOW)
2018-09-29		Marc Deldem
Les Barres Observatory		Celestron C8
SBIG ST8-XME / Clear / 120.0		0.94 ± 3.17
HAT-P-28b (LOW)
2017-11-17		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / Lum / 120.0		-0.56 ± 1.15

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2010-08-09 Buchhave et al. 2011 -0.03 ± 0.76
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