exoclock
exoclock
GJ436b
Discovered by: Butler et al. 2004
The Star
Simbad
GAIA
2MASS
Ross 905
DR2 4017860992519744384
J11421096+2642251
RA 11:42:11.0933 DEC +26:42:23.658
Parallax
102.501 mas
P.M. RA
895.047 mas/y
P.M. DEC
-814.03 mas/y
MagV
10.613
MagR
10.272
MagI
8.24
MagJ
6.9
MagH
6.319
MagK
6.073
MagG
9.571
MagGBP
10.917
MagGRP
8.46
* calculated from GAIA magnitudes

Ephemeris - Verified True
Lanotte et al. 2014
Mid-time
2454865.08403 ± 3e-05 BJDTDB
Period
2.643898 ± 3e-07 days

Transit Parameters
Knutson et al. 2011
Rp/Rs
0.0831 ± 0.0003
a/Rs
14.14 +0.09 -0.1
i
86.7 +0.03 -0.03 deg
e
-
ω
- deg
DepthR*
7.12 mmag
Duration*
1.02 hours
* calculated from the other parameters, using PyLightcurve

Limb Darkening Parameters
Torres et al. 2008
Teff
3350.0 +300.0 -300.0 K
Log(g)
4.84 +0.02 -0.01 cm/s2
Fe/H
-0.03 +0.2 -0.2 dex
ExoClock Status
Observing Priority
Total Observations (Recent)
O-C minutes
Total Literature Mid-times
LOW
26 (8)
0.3±0.3
0
GJ436b


ExoClock Observations
Observation
Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
2021-04-12 Ferran Grau Horta
Ca L'Ou
Meade ACF 16''
FLI Proline PL1001 / B / 100.0
2.2 ± 2.4
2021-04-12 John Savage
Z42 Rushay Farm Observatory
Celestron 14Edge FR
ZWO ASI6200MM / R / 30.0
-0.1 ± 0.9
2021-03-06 Lionel Rousselot
Vierzon
Newton 250/1200
ZWO 1600 monochrome / Clear / 120.0
3.9 ± 2.2
2021-03-06 Manfred Raetz
privat observatory Herges-Hallenberg
SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / R / 120.0
0.7 ± 0.9
2021-03-06 John Savage
Z42 Rushay Farm Observatory
Celestron 14Edge FR
ZWO ASI6200MM / Clear / 30.0
0.4 ± 1.4
2021-03-06 Massimiliano Mannucci
Osservatorio Astronomico Margherita Hack
Celestron C14
SBIG ST10 XME / Clear / 8.0
-0.4 ± 2.6
2021-03-04 Yves Jongen
Deep Sky Chile
Plane Wave CDK 17"
Moravian 4G / R / 120.0
1.2 ± 1.2
2021-02-26 John Savage
Z42 Rushay Farm Observatory
Celestron 14Edge FR
ZWO ASI6200MM / r' / 30.0
2.5 ± 1.7
2020-03-22 Manfred Raetz
privat observatory Herges-Hallenberg
SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / R / 60.0
1.4 ± 1.3 - Data available
2020-03-15 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / Clear / 120.0
-1.1 ± 0.7 - Data available
2020-02-14 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / Clear / 120.0
-2.4 ± 1.0 - Data available
2020-02-14 Roland Casali
Alto 2000
Ritchie Chretien
Kepler 400 sCMOS / Lum / 10.0
-3.7 ± 4.3 - Data available
2020-02-06 Alberto Tomatis
Alto-Observatory
RC
STL 6303 / R / 60.0
1.9 ± 2.2 - Data available
2020-02-06 Anaël Wünsche
Observatoire des Baronnies Provençales
Astelco
FLIPL230 / Clear / 60.0
-1.1 ± 1.2 - Data available
2020-01-29 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / Clear / 120.0
6.6 ± 3.2 - Data available
2019-05-15 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / V / 60.0
2.5 ± 1.9 - Data available
2019-04-08 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / V / 120.0
-0.7 ± 1.2 - Data available
2018-02-09 Lorenzo Betti
Osservatorio Polifunzionale del Chianti
Ritchey-Chretien
Moravian G2 - KAF1603ME / Astrodon ExoPlanet-BB / 20.0
5.8 ± 4.3
2017-04-11 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / Clear / 60.0
3.8 ± 1.3 - Data available
2012-03-12 Alessandro Marchini
Astronomical Observatory, University of Siena
Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 60.0
4.5 ± 2.6
2012-03-04 Filip Walter
Stefanik Observatory
Meade SCT
SBIG ST-10XME / R / 135.0
-0.1 ± 1.0
2011-02-04 Alessandro Marchini
Astronomical Observatory, University of Siena
Mak-Cas 0.3m f/5.6
Sbig STL-6303 / Clear / 60.0
1.8 ± 5.8
2009-01-30 Alessandro Marchini
Astronomical Observatory, University of Siena
Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 150.0
-0.2 ± 1.3
2008-02-16 Filip Walter
Stefanik Observatory
Meade SCT
SBIG ST-10XME / R / 30.0
3.6 ± 1.6
2008-02-16 Alessandro Marchini
Astronomical Observatory, University of Siena
Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 120.0
1.9 ± 2.9
2008-02-08 Alessandro Marchini
Astronomical Observatory, University of Siena
Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 60.0
-2.2 ± 2.7
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