exoclock

HAT-P-8b (LOW)

Discovered by: Latham et al. 2009

The Star
Simbad
GAIA
2MASS
BD+34 4779
DR2 1891507552824189568
J22520985+3526495
RA 22:52:09.8635 DEC +35:26:49.606
Parallax
4.698 mas
P.M. RA
74.747 mas/y
P.M. DEC
15.048 mas/y
MagV
10.36
MagR
10.15
MagI*
9.749
MagJ
9.214
MagH
9.004
MagK
8.953
MagG
10.149
MagGBP
10.439
MagGRP
9.731
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2456052.75596 ± 0.00024 BJDTDB
Period
3.07634347 ± 5.8e-07 days

Transit Parameters
Mancini et al. 2013
Rp/Rs
0.0921 ± 0.0005
a/Rs
6.29 +0.06 -0.06
i
87.1 +0.4 -0.4 deg
e
-
ω
- deg
DepthR*
10.94 mmag
Duration*
3.93 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Latham et al. 2009
Teff
6200.0 +80.0 -80.0 K
Log(g)
4.15 +0.05 -0.05 cm/s2
Fe/H
0.01 +0.08 -0.08 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.0"
Total Observations (Recent) 25 (5)
O-C 1.46 ± 0.55 minutes
ExoClock Observations (Recent) 13 (5)
Space Observations (Recent) 0 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 12 (0)
Kepler Rp/Rs -
TESS Rp/Rs -

HAT-P-8b


ExoClock Observations

Planet
Observation Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
HAT-P-8b (LOW)
2022-11-20
Claudio Lopresti
Claudio Lopresti
Meade LX200 12"
CCD Sbig ST9xe / R / 120.0
-0.27 ± 1.87
HAT-P-8b (LOW)
2022-10-17
Adrian Jones
Private Observatory (I64)
Meade ACF 30cm
QSI 583 / R / 60.0
2.53 ± 1.09
HAT-P-8b (LOW)
2022-10-02
Po-Jian Chiu
zhshs obs
Takahashi FS-152
ZWO ASI6200MM / Lum / 60.0
6.5 ± 3.31
HAT-P-8b (LOW)
2022-09-04
Manfred Raetz
privat observatory Herges-Hallenberg
SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / R / 120.0
0.0 ± 1.15
HAT-P-8b (LOW)
2022-08-29
Alexey Garmash
Lyceum 130
SW Esprit 150ED
ASI2600MM / V / 40.0
2.55 ± 1.31
HAT-P-8b (LOW)
2021-10-13
Claudio Lopresti
Claudio Lopresti
Meade LX200 12"
CCD Sbig ST9xe / Lum / 90.0
1.45 ± 1.44
HAT-P-8b (LOW)
2021-09-06
Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)
Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Clear / 90.0
-0.39 ± 2.16
HAT-P-8b (LOW)
2020-10-21
Manfred Raetz
privat observatory Herges-Hallenberg
SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / R / 120.0
0.8 ± 1.73
HAT-P-8b (LOW)
2020-09-15
Manfred Raetz
privat observatory Herges-Hallenberg
SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / R / 120.0
-2.92 ± 1.3
HAT-P-8b (LOW)
2020-09-08
Mauro Caló
Cavallino
RC
SBIG ST10 / Lum / 40.0
-0.63 ± 2.02
HAT-P-8b (LOW)
2020-08-02
Carmelo Falco
GALHassin Robotic Telescope 2 (GRT2)
Giacometti-Fogale RC16
Andor Apogee Aspen CG16M / Lum / 30.0
0.41 ± 0.86
HAT-P-8b (LOW)
2020-07-30
Claudio Lopresti
Claudio Lopresti
Mak-Newton
CCD Sbig ST10xme / I / 120.0
-3.13 ± 3.02
HAT-P-8b (LOW)
2019-08-02
Nikolaos Paschalis
Nunki Observatory
Officina Stellare RILA 400
SBIG STXL 11002 / R / 60.0
4.4 ± 2.16

Literature Mid-times

Planet
Observation Date
Reference O-C
minutes
2016-09-05 Wang et al. 2021 0.94 ± 2.74
2012-10-02 Mancini et al. 2013 0.04 ± 1.2
2012-10-02 Mancini et al. 2013 -0.24 ± 0.45
2012-08-27 Mancini et al. 2013 1.6 ± 0.82
2012-08-27 Mancini et al. 2013 1.37 ± 0.73
2012-08-27 Mancini et al. 2013 -2.06 ± 0.78
2012-08-27 Mancini et al. 2013 -4.42 ± 1.58
2011-10-05 Mancini et al. 2013 0.27 ± 0.71
2011-10-05 Mancini et al. 2013 -0.22 ± 0.91
2010-08-28 Mancini et al. 2013 -1.68 ± 0.62
2009-10-22 Mancini et al. 2013 -3.05 ± 1.14
2007-12-03 Latham et al. 2009 1.34 ± 0.49
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