exoclock

KELT-20b (MEDIUM)

Discovered by: Lund et al. 2017

The Star
Simbad
GAIA
2MASS
HD 185603
DR2 2033123654092592384
J19383872+3113091
RA 19:38:38.7352 DEC +31:13:09.215
Parallax
7.301 mas
P.M. RA
3.096 mas/y
P.M. DEC
-6.157 mas/y
MagV
7.58
MagR*
7.544
MagI*
7.476
MagJ
7.424
MagH
7.446
MagK
7.415
MagG
7.575
MagGBP
7.625
MagGRP
7.534
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2459288.807775 ± 2.1e-05 BJDTDB
Period
3.47410042 ± 2.2e-07 days

Transit Parameters
Lund et al. 2017
Rp/Rs
0.1144 ± 0.00062
a/Rs
7.5 +0.05 -0.05
i
86.12 +0.28 -0.27 deg
e
-
ω
- deg
DepthR*
15.61 mmag
Duration*
3.53 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Lund et al. 2017
Teff
8720.0 +250.0 -260.0 K
Log(g)
4.29 +0.02 -0.02 cm/s2
Fe/H
-0.29 +0.22 -0.36 dex
ExoClock Status
Observing Priority MEDIUM
Minimum aperture 5.0"
Total Observations (Recent) 30 (2)
O-C -1.12 ± 0.35 minutes
ExoClock Observations (Recent) 9 (2)
Space Observations (Recent) 18 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 3 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.115462 ± 5.8e-05

KELT-20b


ExoClock Observations

Planet
Observation Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
KELT-20b (MEDIUM)
2023-09-14
Patrick Wagner
Balkonien
SkyMax 127T
ZWO ASI 1600MM / R / 20.0
0.02 ± 3.02
KELT-20b (MEDIUM)
2023-07-17
Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)
Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / R / 20.0
0.33 ± 0.88
KELT-20b (MEDIUM)
2022-08-07
Michael Irzyk
Melun
C14
H694 / I / 30.0
-1.64 ± 1.01
KELT-20b (MEDIUM)
2022-08-01
Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave 2
ZWO ASI6200 / R / 30.0
0.24 ± 1.01
KELT-20b (MEDIUM)
2022-08-01
Michael Irzyk
Melun
C14
H694 / I / 40.0
-0.63 ± 0.58
KELT-20b (MEDIUM)
2022-08-01
Lionel Rousselot
Private observatory Vierzon
Newton 250/1200
ZWO 1600 monochrome / R / 60.0
-2.36 ± 1.3
KELT-20b (MEDIUM)
2022-08-01
Jean-Claude MARIO
Observatoire de la Cabergue
T 520 Cassegrain "Arp 83"
STL 11000 - KAI 11000 / Clear / 10.0
-2.5 ± 3.17
KELT-20b (MEDIUM)
2022-08-01
Alvaro Fornas Silva
Centro Astronómico Alto Turia (CAAT). MPC J57
Planewave CDK 17"
Sbig STXL 11002 / V / 60.0
-4.08 ± 1.01
KELT-20b (MEDIUM)
2022-06-09
Fran Campos
Puig d'Agulles Observtory
RC14" on EQ8 German mount
SBIG ST-8XME / R / 90.0
-3.93 ± 2.45

Space Observations

Planet
Observation Date
Mission O-C
minutes
KELT-20b (MEDIUM)
2021-08-18
TESS0.06 ± 0.14
KELT-20b (MEDIUM)
2021-08-15
TESS0.1 ± 0.13
KELT-20b (MEDIUM)
2021-08-11
TESS0.02 ± 0.14
KELT-20b (MEDIUM)
2021-08-04
TESS0.03 ± 0.16
KELT-20b (MEDIUM)
2021-08-01
TESS0.08 ± 0.13
KELT-20b (MEDIUM)
2021-07-28
TESS0.05 ± 0.14
KELT-20b (MEDIUM)
2021-07-25
TESS0.3 ± 0.14
KELT-20b (MEDIUM)
2021-07-21
TESS-0.25 ± 0.13
KELT-20b (MEDIUM)
2021-07-18
TESS0.07 ± 0.13
KELT-20b (MEDIUM)
2021-07-14
TESS-0.06 ± 0.14
KELT-20b (MEDIUM)
2021-07-11
TESS-0.13 ± 0.14
KELT-20b (MEDIUM)
2021-07-07
TESS0.05 ± 0.14
KELT-20b (MEDIUM)
2021-07-04
TESS-0.09 ± 0.14
KELT-20b (MEDIUM)
2021-07-01
TESS-0.16 ± 0.17
KELT-20b (MEDIUM)
2021-06-27
TESS-0.18 ± 0.13
KELT-20b (MEDIUM)
2019-08-06
TESS0.1 ± 0.16
KELT-20b (MEDIUM)
2019-08-02
TESS-0.03 ± 0.17
KELT-20b (MEDIUM)
2019-07-19
TESS0.13 ± 0.17

Literature Mid-times

Planet
Observation Date
Reference O-C
minutes
2018-09-30 Casasayas-Barris et al. 2019 -0.79 ± 0.6
2018-07-13 Casasayas-Barris et al. 2019 0.15 ± 0.32
2016-04-24 Lund et al. 2017 -0.16 ± 0.27
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