exoclock

HAT-P-28b

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. 2021
Mid-time
2458124.34308 ± 0.00022 BJDTDB
Period
3.2572129 ± 6e-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 to produce a duration that matches the 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
ExoClock Observations (Recent)
Space Observations
Literature Mid-times
ETD Observations
O-C minutes 		LOW
15 (4)

1

0.1±0.3

HAT-P-28b


ExoClock Observations

Observation
Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
2022-07-25 Yves Jongen
Rasteau Observatory		 Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 180.0		 1.2 ± 1.3
2022-01-13 Adrian Jones
Private Observatory (I64)		 Meade ACF 30cm
QSI 583 / R / 150.0		 2.7 ± 2.6
2022-01-13 Paolo Arcangelo Matassa
P.M.P.H.R. Deep Sky (K81)		 Ritchey Chretien 40cm-F4.6
ICX453AQ / Lum / 120.0		 -1.6 ± 4.3
2021-10-17 Adrian Jones
Private Observatory (I64)		 Meade ACF 30cm
QSI 583 / R / 200.0		 0.9 ± 4.3
2020-11-13 Mike Miller
Georgetown Observatory		 Meade 10 inch ACF f8 f5
QSI 540 / V / 120.0		 2.6 ± 5.8
2020-09-22 Manfred Raetz
privat observatory Herges-Hallenberg		 SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		 -2.6 ± 1.2 - Data available
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 ± 0.9 - Data available
2020-08-26 Dim Stouraitis
Galilaios		 SCT
SXVF-H9 Starlight-Xpress / R / 70.0		 0.1 ± 1.7 - Data available
2019-12-03 Anaël Wünsche
Observatoire des Baronnies Provençales		 Astelco
FLIPL230 / Clear / 60.0		 -2.8 ± 0.9 - Data available
2019-10-25 Nikolaos Paschalis
Nunki Observatory		 Officina Stellare RILA 400
SBIG STXL 11002 / Rc / 60.0		 0.5 ± 3.2 - Data available
2019-10-02 Yves Jongen
Rasteau Observatory		 Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		 1.6 ± 1.6 - Data available
2018-12-26 Yves Jongen
Rasteau Observatory		 Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		 1.3 ± 1.4 - Data available
2018-10-12 Anaël Wünsche
Observatoire des Baronnies Provençales		 Astelco
FLIPL230 / Clear / 60.0		 0.6 ± 0.6 - Data available
2018-09-29 Marc Deldem
Les Barres Observatory		 Celestron C8
SBIG ST8-XME / Clear / 120.0		 1.0 ± 3.2 - Data available
2017-11-17 Anaël Wünsche
Observatoire des Baronnies Provençales		 Astelco
FLIPL230 / Lum / 120.0		 -0.6 ± 1.2 - Data available


Literature Mid-times

Observation
Date		 Mid-time Time format Reference O-C
minutes
2010-08-09 2455417.59832 ± 0.00053 BJD_UTC Buchhave et al. 2011 -0.1 ± 0.8
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