exoclock

HAT-P-20b (LOW)

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. 2022
Mid-time
2457959.12043 ± 5.6e-05 BJDTDB
Period
2.87531773 ± 1.1e-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.
**Adjusted based on the space observations.

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 LOW
Minimum aperture 5.0"
Total Observations (Recent) 94 (3)
O-C 0.91 ± 0.19 minutes
ExoClock Observations (Recent) 50 (3)
Space Observations (Recent) 22 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 22 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.14227 ± 0.00024

HAT-P-20b


ExoClock Observations

Planet
Observation Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
HAT-P-20b (LOW)
2024-01-18
Emanuele Pavoni
Leavitt Observatory
RC
QHY268 / R / 120.0
-2.58 ± 1.02
HAT-P-20b (LOW)
2023-12-23
Yves Jongen
Rasteau Observatory
Plane Wave CDK 17"
SBIG STXL 11002 / R / 120.0
1.68 ± 0.72
HAT-P-20b (LOW)
2023-10-13
Joan Josep Isach Cogollos
Centro Astronómico Alto Turia (CAAT). MPC J57
Skywatcher
ZWO ASI 1600 MM / Lum / 120.0
-0.93 ± 1.17
HAT-P-20b (LOW)
2023-02-27
Stéphane Montchaud
Burgundy Observatory
Celestron 8
Zwo Asi 1600 / Lum / 120.0
-0.58 ± 1.3
HAT-P-20b (LOW)
2023-02-07
Simon Dawes
William James II Observatory
Skywatcher MN190 2
ZWO ASI 1600MM-PRO USB 3.0 Mono Camera / Lum / 180.0
5.02 ± 3.02
HAT-P-20b (LOW)
2023-02-07
Lionel Rousselot
Private observatory Vierzon
Newton 250/1000
ZWO 1600 monochrome / rpr / 45.0
3.35 ± 0.73
HAT-P-20b (LOW)
2023-02-07
Francesco Scaggiante
Gruppo Astrofili Salese "GALILEO GALILEI"
NEWTON 410/1710
Custom made with KAF-1603ME CCD sensor / R / 25.0
2.66 ± 0.82
HAT-P-20b (LOW)
2023-02-07
Stephane Ferratfiat
Observatoire des Baronnies Provençales
T430
Cmos ASI 6200 ZWO / Clear / 120.0
0.04 ± 0.5
HAT-P-20b (LOW)
2023-02-07
Claudio Lopresti
Claudio Lopresti
Mak-Newton
CCD Sbig ST10xme / I / 180.0
-0.19 ± 1.14
HAT-P-20b (LOW)
2023-02-02
Fabio Mortari
Hypatia Observatory
Ritchey Chretienne 250mm f/5.3
MORAVIAN C2-7000A / R / 200.0
-1.16 ± 1.34
HAT-P-20b (LOW)
2023-01-12
Mark Salisbury
POST
Orion Optics ODK
SBIG ST-10 XME / R / 240.0
1.39 ± 0.33
HAT-P-20b (LOW)
2022-12-18
Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave 2
ZWO ASI6200 / Clear / 120.0
-0.0 ± 0.59
HAT-P-20b (LOW)
2022-12-15
Adrian Jones
Private Observatory (I64)
Meade ACF 30cm
QSI 583 / R / 60.0
-0.21 ± 0.68
HAT-P-20b (LOW)
2022-11-30
Nataliia Maslennikova
Caucasus Mountain Observatory SAI MSU
RC-600 ASA
Andor iKon-L / I / 8.0
2.6 ± 0.81
HAT-P-20b (LOW)
2022-11-30
Vikrant Kumar Agnihotri
Cepheid Observatory India
GSO Ritchey–Chrétien
SX-35 TRIUS mono (KAF11002) / Lum / 120.0
1.17 ± 1.73
HAT-P-20b (LOW)
2022-10-10
Adam Popowicz
Observatory Pyskowice
RC12" GSO
ASI ZWO 1600 MM / ATIK 11000M / R / 120.0
-0.24 ± 2.88
HAT-P-20b (LOW)
2022-02-24
Adrian Jones
Private Observatory (I64)
Meade ACF 30cm
QSI 583 / R / 60.0
2.06 ± 1.01
HAT-P-20b (LOW)
2022-02-24
Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)
Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0
0.77 ± 1.15
HAT-P-20b (LOW)
2022-02-24
Martin Mifsud
Manikata Observatory
Meade OTA
SBig ST10XME / Lum / 120.0
-2.11 ± 1.3
HAT-P-20b (LOW)
2022-02-04
Adrian Jones
Private Observatory (I64)
Meade ACF 30cm
QSI 583 / R / 60.0
0.08 ± 1.87
HAT-P-20b (LOW)
2022-02-04
Martin Crow
Burnham Observatory
Celestron C9.25
SX694 mono / R / 40.0
-0.49 ± 1.3
HAT-P-20b (LOW)
2022-02-01
Alberto García Sánchez
Rio Cofio
MEADE LX200 Classic
SBIG ST8-XME / Clear / 180.0
2.84 ± 0.72
HAT-P-20b (LOW)
2022-02-01
Claudio Lopresti
Claudio Lopresti
Meade LX200 12"
CCD Sbig ST9xe / R / 90.0
1.25 ± 0.52
HAT-P-20b (LOW)
2022-01-30
Kevin Johnson
Holbrook Observatory
Meade LX10 EMC
Atik 383L+ / R / 180.0
0.28 ± 1.3
HAT-P-20b (LOW)
2022-01-12
Claudio Lopresti
Claudio Lopresti
Mak-Newton
CCD Sbig ST10xme / I / 240.0
3.46 ± 1.01
HAT-P-20b (LOW)
2022-01-12
Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)
Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0
-2.45 ± 2.3
HAT-P-20b (LOW)
2021-12-17
Claudio Lopresti
Claudio Lopresti
Mak-Newton
CCD Sbig ST10xme / I / 120.0
2.1 ± 1.58
HAT-P-20b (LOW)
2021-12-17
Andras Dan
Rocca1
Celestron C8
QHY 183 M / Clear / 60.0
0.66 ± 1.15
HAT-P-20b (LOW)
2021-12-17
Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)
Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 120.0
-0.06 ± 4.32
HAT-P-20b (LOW)
2021-04-08
Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave 2
ZWO ASI6200 / Clear / 120.0
0.75 ± 0.58
HAT-P-20b (LOW)
2021-04-08
Dominique DANIEL
La Montjoie
Celestron CGX C8 XLT
Camera CMOS ZWO ASI294MC pro (color) / Lum / 120.0
0.6 ± 1.15
HAT-P-20b (LOW)
2021-04-08
Tõnis Eenmäe
Tartu Observatory
Planewave CDK 12.5
Apogee Alta U42 / R / 25.0
0.17 ± 1.01
HAT-P-20b (LOW)
2021-04-08
Üllar Kivila
Science Centre AHHAA
TS Optics RC 203/1624
ZWO ASI224MC / Lum / 60.0
-0.26 ± 3.17
HAT-P-20b (LOW)
2021-03-16
Jean-Bernard Pioppa
La Roque-Esclapon
KEPLER
ATIK 383 L+ / R / 120.0
-2.65 ± 1.87
HAT-P-20b (LOW)
2021-02-21
Valère Perroud
Observatoire de Duines
RC 10
Moravian G2-4000 / Lum / 90.0
-1.29 ± 1.01
HAT-P-20b (LOW)
2020-12-09
Yves Jongen
Rasteau Observatory
Plane Wave CDK 17"
SBIG STXL 11002 / R / 120.0
-2.07 ± 0.72
HAT-P-20b (LOW)
2020-11-19
Jacques Michelet
Claix
Celestron C11 Edge HD
QSI-632 WSG / AstrodonExoPlanet-BB / 30.0
-1.46 ± 0.86
HAT-P-20b (LOW)
2020-11-19
David Wright
Yorick (private observatory)
10" Ritchey-Chretien
QSI 683WSG-8 / R / 250.0
-2.32 ± 1.44
HAT-P-20b (LOW)
2020-03-28
Martin Fowler
MicroObservatory Cecilia
MicroObservatory robotic telescope
KAF 1402ME / Clear / 60.0
0.78 ± 2.02
HAT-P-20b (LOW)
2020-03-13
Francois Hurter
Albireo Observatory
RC GSO Serrurier Kepler f/8
Atik 383L+ / V / 35.0
-0.68 ± 0.58
HAT-P-20b (LOW)
2020-02-19
Mario Morales-Aimar
Observatorio de Sencelles MPC K14
Reflector 10"
SBIG ST7-XME / V / 90.0
0.39 ± 0.86
HAT-P-20b (LOW)
2020-01-24
Pavel Pintr
Horni Halze
Celestron C9.25 with Hyperstar f2.2
ASI ZWO 1600 MONO / R / 70.0
1.77 ± 1.73
HAT-P-20b (LOW)
2020-01-01
Pavel Pintr
Horni Halze
Celestron C9.25 with Hyperstar f2.2
ASI ZWO 1600 MONO / R / 90.0
-0.9 ± 0.86
HAT-P-20b (LOW)
2019-12-01
Martin Fowler
MicroObservatory Cecilia
MicroObservatory robotic telescope
KAF 1402ME / Clear / 60.0
2.69 ± 2.02
HAT-P-20b (LOW)
2019-03-08
Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / V / 120.0
1.75 ± 1.01
HAT-P-20b (LOW)
2018-02-10
Claudio Lopresti
Claudio Lopresti
Mak-Newton
CCD Sbig ST10xme / Clear / 240.0
0.62 ± 0.43
HAT-P-20b (LOW)
2018-01-13
Martin Fowler
MicroObservatory Cecilia
MicroObservatory robotic telescope
KAF 1402ME / Clear / 60.0
-3.02 ± 1.73
HAT-P-20b (LOW)
2015-02-22
Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / Clear / 30.0
0.88 ± 0.72
HAT-P-20b (LOW)
2012-12-27
Ramon Naves
Montcabrer
Meade LX200 12" ACF
Sbig ST8xme / R / 120.0
2.44 ± 0.52
HAT-P-20b (LOW)
2011-01-16
Filip Walter
Stefanik Observatory
Meade SCT
SBIG ST-10XME / R / 90.0
0.07 ± 0.72

Space Observations

Planet
Observation Date
Mission O-C
minutes
HAT-P-20b (LOW)
2021-12-29
TESS0.36 ± 0.36
HAT-P-20b (LOW)
2021-12-26
TESS0.84 ± 0.33
HAT-P-20b (LOW)
2021-12-23
TESS0.16 ± 0.32
HAT-P-20b (LOW)
2021-12-20
TESS-0.49 ± 0.33
HAT-P-20b (LOW)
2021-12-15
TESS-0.02 ± 0.35
HAT-P-20b (LOW)
2021-12-12
TESS0.64 ± 0.32
HAT-P-20b (LOW)
2021-12-09
TESS-0.01 ± 0.39
HAT-P-20b (LOW)
2021-12-06
TESS0.65 ± 0.37
HAT-P-20b (LOW)
2021-11-30
TESS-0.09 ± 0.36
HAT-P-20b (LOW)
2021-11-27
TESS0.09 ± 0.35
HAT-P-20b (LOW)
2021-11-24
TESS0.2 ± 0.35
HAT-P-20b (LOW)
2021-11-19
TESS-0.78 ± 0.37
HAT-P-20b (LOW)
2021-11-16
TESS0.62 ± 0.33
HAT-P-20b (LOW)
2021-11-13
TESS0.28 ± 0.27
HAT-P-20b (LOW)
2021-11-10
TESS-0.22 ± 0.3
HAT-P-20b (LOW)
2021-11-04
TESS-0.12 ± 0.35
HAT-P-20b (LOW)
2021-11-01
TESS0.44 ± 0.33
HAT-P-20b (LOW)
2021-10-30
TESS0.0 ± 0.32
HAT-P-20b (LOW)
2021-10-27
TESS-0.41 ± 0.33
HAT-P-20b (LOW)
2021-10-21
TESS-0.35 ± 0.33
HAT-P-20b (LOW)
2021-10-18
TESS0.32 ± 0.37
HAT-P-20b (LOW)
2021-10-15
TESS-0.15 ± 0.32

Literature Mid-times

Planet
Observation Date
Reference O-C
minutes
2017-11-13 Wang et al. 2021 -0.32 ± 1.87
2017-01-21 Wang et al. 2021 2.15 ± 1.09
2016-11-30 Wang et al. 2021 0.44 ± 1.17
2016-11-07 Wang et al. 2021 -0.08 ± 0.53
2016-03-05 Wang et al. 2021 1.92 ± 0.76
2016-03-02 Wang et al. 2021 0.88 ± 2.74
2015-04-09 Sun et al. 2017 -0.06 ± 0.94
2015-01-28 Sun et al. 2017 -0.08 ± 0.94
2014-10-25 Esposito et al. 2017 -0.38 ± 0.08
2014-10-25 Sun et al. 2017 -0.78 ± 0.58
2013-12-07 Sun et al. 2017 1.83 ± 0.49
2013-11-14 Sun et al. 2017 -0.32 ± 1.09
2012-03-11 Sun et al. 2017 0.23 ± 0.55
2012-01-17 Esposito et al. 2017 1.42 ± 0.36
2011-12-22 Granata et al. 2014 -0.56 ± 0.4
2011-11-29 Granata et al. 2014 2.35 ± 0.62
2011-02-05 Granata et al. 2014 0.93 ± 0.23
2010-12-27 Sun et al. 2017 1.47 ± 0.36
2010-12-27 Sun et al. 2017 -1.65 ± 0.5
2010-12-24 Sun et al. 2017 0.92 ± 1.85
2010-12-01 Sun et al. 2017 -1.45 ± 0.6
2009-09-06 Bakos et al. 2011 -0.0 ± 0.3
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