exoclock
exoclock
HAT-P-20b
Discovered by: Bakos et al. 2011
The Star
Simbad
GAIA
2MASS
HAT-P-20
DR2 869913435026514688
J07273995+2420118
RA 07:27:39.9487 DEC +24:20:11.518
Parallax
14.048 mas
P.M. RA
-4.985 mas/y
P.M. DEC
-96.235 mas/y
MagV
11.35
MagR
11.0
MagI*
10.088
MagJ
9.276
MagH
8.743
MagK
8.601
MagG
10.99
MagGBP
11.665
MagGRP
10.235
* calculated from GAIA magnitudes

Ephemeris - Verified True
Kokori et al. 2020
Mid-time
2456670.97803 ± 0.0001 BJDTDB
Period
2.875317 ± 4e-07 days

Transit Parameters
Bakos et al. 2011
Rp/Rs
0.1284 ± 0.0016
a/Rs
11.2 +0.3 -0.3
i
86.8 +0.2 -0.2 deg
e
0.015 +0.005 -0.005
ω
317.0 +130.0 -130.0 deg
DepthR*
19.78 mmag
Duration*
1.86 hours
* calculated from the other parameters, using PyLightcurve

Limb Darkening Parameters
Bakos et al. 2011
Teff
4595.0 +80.0 -80.0 K
Log(g)
4.63 +0.02 -0.02 cm/s2
Fe/H
0.35 +0.08 -0.08 dex
ExoClock Status
Observing Priority
Total Observations (Recent)
O-C minutes
Total Literature Mid-times
LOW
17 (2)
0.51±0.21
16
HAT-P-20b


ExoClock Observations
Observation
Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
2021-04-08 Üllar Kivila
Science Centre AHHAA
TS Optics RC 203/1624
ZWO ASI224MC / Lum / 60.0
0.8 ± 3.2
2021-02-21 Valère Perroud
Observatoire de Duines
RC 10
Moravian G2-4000 / Lum / 90.0
-0.3 ± 1.0
2020-12-09 Yves Jongen
Rasteau Observatory
Plane Wave CDK 17"
SBIG STXL 11002 / R / 120.0
-1.1 ± 0.7
2020-11-18 Jacques Michelet
Claix
Celestron C11 Edge HD
QSI-632 WSG / Astrodon ExoPlanet-BB / 30.0
-0.5 ± 0.9
2020-11-18 Dave Wright
Yorick (private observatory)
10" Ritchey-Chretien
QSI 683WSG-8 / R / 250.0
-1.3 ± 1.4
2020-03-28 Martin Fowler
MicroObservatory Cecilia
MicroObservatory robotic telescope
KAF 1402ME / Clear / 60.0
1.7 ± 2.0 - Data available
2020-03-13 Francois Hurter
Albireo Observatory
RC GSO Serrurier Kepler f/8
Atik 383L+ / V / 35.0
0.2 ± 0.6 - Data available
2020-02-19 Mario Morales Aimar
Observatorio de Sencelles MPC K14
Reflector 10"
SBIG ST7-XME / V / 90.0
1.3 ± 0.9
2020-01-24 Pavel Pintr
Horni Halze
Celestron C9.25 with Hyperstar f2.2
ASI ZWO 1600 MONO / R / 70.0
2.7 ± 1.7 - Data available
2020-01-01 Pavel Pintr
Horni Halze
Celestron C9.25 with Hyperstar f2.2
ASI ZWO 1600 MONO / R / 90.0
-0.0 ± 0.9 - Data available
2019-12-01 Martin Fowler
MicroObservatory Cecilia
MicroObservatory robotic telescope
KAF 1402ME / Clear / 60.0
3.6 ± 2.0 - Data available
2019-12-01 Roger Dymock
MicroObservatory
Maksutov reflector
Kodak KAF 1400 image sensor / Clear / 60.0
-2.6 ± 4.3 - Data available
2019-03-09 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / V / 120.0
2.5 ± 1.0 - Data available
2018-02-10 Claudio Lopresti
Claudio Lopresti
Mak-Newton
CCD Sbig ST10xme / Clear / 240.0
1.2 ± 0.4 - Data available
2018-01-13 Martin Fowler
MicroObservatory Cecilia
MicroObservatory robotic telescope
KAF 1402ME / Clear / 60.0
-2.4 ± 1.7 - Data available
2015-02-22 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / Clear / 30.0
1.1 ± 0.7
2011-01-16 Filip Walter
Stefanik Observatory
Meade SCT
SBIG ST-10XME / R / 90.0
-0.2 ± 0.7


Literature Mid-times
Observation
Date
Mid-time Time format Reference O-C
minutes
2015-04-09 2457122.402932 ± 0.000654 BJD_TDB Sun et al. 2017 0.2 ± 0.9
2015-01-28 2457050.519975 ± 0.000654 BJD_TDB Sun et al. 2017 0.1 ± 0.9
2014-10-25 2456955.634275 ± 5.5e-05 BJD_TDB Esposito et al. 2017 -0.2 ± 0.1
2014-10-25 2456955.633993 ± 0.0004 BJD_TDB Sun et al. 2017 -0.6 ± 0.6
2013-12-07 2456633.600233 ± 0.00034 BJD_TDB Sun et al. 2017 1.9 ± 0.5
2013-11-14 2456610.59619 ± 0.00076 BJD_TDB Sun et al. 2017 -0.3 ± 1.1
2012-03-11 2455998.153904 ± 0.00038 BJD_TDB Sun et al. 2017 0.1 ± 0.5
2012-01-17 2455943.52369 ± 0.00025 BJD_TDB Esposito et al. 2017 1.2 ± 0.4
2011-12-22 2455917.64445 ± 0.00028 BJD_TDB Granata et al. 2014 -0.8 ± 0.4
2011-11-29 2455894.64393 ± 0.00043 BJD_TDB Granata et al. 2014 2.1 ± 0.6
2011-02-05 2455598.48522 ± 0.00016 BJD_TDB Granata et al. 2014 0.6 ± 0.2
2010-12-27 2455558.231145 ± 0.000249 BJD_TDB Sun et al. 2017 1.1 ± 0.4
2010-12-27 2455558.228982 ± 0.000348 BJD_TDB Sun et al. 2017 -2.0 ± 0.5
2010-12-24 2455555.35545 ± 0.001282 BJD_TDB Sun et al. 2017 0.6 ± 1.8
2010-12-01 2455532.351257 ± 0.00042 BJD_TDB Sun et al. 2017 -1.8 ± 0.6
2009-09-06 2455080.92661 ± 0.00021 BJD_UTC Bakos et al. 2011 -0.5 ± 0.3
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