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
Kokori et al. 2021
Mid-time
2454873.01582 ± 4e-05 BJDTDB
Period
2.64389751 ± 1.2e-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.
**Adjusted to produce a duration that matches the observations.

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
ExoClock Observations (Recent)
Space Observations
Literature Mid-times
ETD Observations
O-C minutes
LOW
32 (6)

22

1.21±0.25

GJ436b


ExoClock Observations

Observation
Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
2022-04-25 Mercedes Correa
Sirius B
Meade
Moravian G2 1600 / R / 60.0
1.2 ± 1.3
2022-04-04 Francesco Scaggiante
Gruppo Astrofili Salese "GALILEO GALILEI"
NEWTON 410/1710
Custom made with KAF-1603ME CCD sensor / R / 15.0
-1.7 ± 1.0
2022-04-02 Bryan Martin
Tiger Butte Obseratory
AG Opitcal
ZWO ASI 294 / Astrodon ExoPlanet-BB / 45.0
-1.0 ± 1.4
2022-03-19 Martin Crow
Burnham Observatory
Celestron C9.25
SX694 mono / R / 20.0
5.6 ± 2.9
2022-03-19 Adrian Jones
Private Observatory (I64)
Meade ACF 30cm
QSI 583 / R / 60.0
3.3 ± 1.9
2022-02-10 Adrian Jones
Private Observatory (I64)
Meade ACF 30cm
QSI 583 / R / 60.0
0.8 ± 2.0
2021-04-12 Ferran Grau Horta
Ca L'Ou
Meade ACF 16''
FLI Proline PL1001 / B / 100.0
3.3 ± 2.4
2021-04-12 John Savage
Z42 Rushay Farm Observatory
Celestron 14Edge FR
ZWO ASI6200MM / R / 30.0
1.0 ± 0.9
2021-03-06 Lionel Rousselot
Vierzon
Newton 250/1200
ZWO 1600 monochrome / Clear / 120.0
4.9 ± 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
1.8 ± 0.9
2021-03-06 John Savage
Z42 Rushay Farm Observatory
Celestron 14Edge FR
ZWO ASI6200MM / Clear / 30.0
1.5 ± 1.4
2021-03-06 Massimiliano Mannucci
Osservatorio Astronomico Margherita Hack
Celestron C14
SBIG ST10 XME / Clear / 8.0
0.6 ± 2.6
2021-03-04 Yves Jongen
Deep Sky Chile
Plane Wave CDK 17"
Moravian 4G / R / 120.0
2.2 ± 1.2
2021-02-26 John Savage
Z42 Rushay Farm Observatory
Celestron 14Edge FR
ZWO ASI6200MM / r' / 30.0
3.5 ± 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
2.3 ± 1.3 - Data available
2020-03-14 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / Clear / 120.0
0.9 ± 0.7 - Data available
2020-02-14 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / Clear / 120.0
-1.5 ± 1.0 - Data available
2020-02-14 Roland Casali
Alto 2000
Ritchie Chretien
Kepler 400 sCMOS / Lum / 10.0
-2.8 ± 4.3 - Data available
2020-02-06 Alberto Tomatis
Alto-Observatory
RC
STL 6303 / R / 60.0
2.8 ± 2.2 - Data available
2020-02-06 Anaël Wünsche
Observatoire des Baronnies Provençales
Astelco
FLIPL230 / Clear / 60.0
-0.2 ± 1.2 - Data available
2020-01-30 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / Clear / 120.0
5.0 ± 1.2 - Data available
2019-05-15 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / V / 60.0
3.3 ± 1.9 - Data available
2019-04-08 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / V / 120.0
0.1 ± 1.2 - Data available
2018-02-09 Lorenzo Betti
Osservatorio Polifunzionale del Chianti
Ritchey-Chretien
Moravian G2 - KAF1603ME / Astrodon ExoPlanet-BB / 20.0
4.9 ± 3.2 - Data available
2017-04-11 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / Clear / 60.0
4.4 ± 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
4.7 ± 2.6
2012-03-04 Filip Walter
Stefanik Observatory
Meade SCT
SBIG ST-10XME / R / 135.0
0.0 ± 1.0 - Data available
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
-0.3 ± 1.3
2008-02-16 Filip Walter
Stefanik Observatory
Meade SCT
SBIG ST-10XME / R / 30.0
3.4 ± 1.6 - Data available
2008-02-16 Alessandro Marchini
Astronomical Observatory, University of Siena
Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 120.0
1.6 ± 2.9
2008-02-09 Alessandro Marchini
Astronomical Observatory, University of Siena
Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 60.0
-2.4 ± 2.7


Literature Mid-times

Observation
Date
Mid-time Time format Reference O-C
minutes
2013-01-02 2456295.4327 ± 7e-05 BJD_TDB Knutson et al. 2014 0.0 ± 0.1
2012-12-10 2456271.63758 ± 0.0001 BJD_TDB Knutson et al. 2014 -0.0 ± 0.1
2012-11-29 2456261.06211 ± 0.0001 BJD_TDB Knutson et al. 2014 0.1 ± 0.1
2012-10-26 2456226.69131 ± 0.00011 BJD_TDB Knutson et al. 2014 -0.1 ± 0.2
2009-01-28 2454859.79494 ± 8e-05 BJD_UTC Beaulieu et al. 2011 -0.9 ± 0.1
2008-03-09 2454534.59584 ± 0.00015 HJD_UTC Alonso et al. 2008 -0.5 ± 0.2
2008-02-09 2454505.51379 ± 0.0005 HJD_UTC Ribas et al. 2008 0.8 ± 0.7
2008-01-02 2454468.49911 ± 0.00094 HJD_UTC Bean et al. 2008 0.6 ± 1.4
2007-12-28 2454463.20994 ± 0.00089 HJD_UTC Bean et al. 2008 -1.4 ± 1.3
2007-12-12 2454447.34757 ± 0.0008 HJD_UTC Bean et al. 2008 0.1 ± 1.2
2007-12-10 2454444.70385 ± 0.00093 HJD_UTC Bean et al. 2008 0.3 ± 1.3
2007-12-04 2454439.41607 ± 0.00068 HJD_UTC Bean et al. 2008 0.4 ± 1.0
2007-06-29 2454280.78186 ± 0.00015 HJD_UTC Gillon et al. 2007 -0.3 ± 0.2
2007-05-31 2454251.69956 ± 0.0003 HJD_UTC Shporer et al. 2009 0.6 ± 0.4
2007-05-25 2454246.40982 ± 0.0004 HJD_UTC Shporer et al. 2009 -2.3 ± 0.6
2007-05-23 2454243.76657 ± 0.00026 HJD_UTC Shporer et al. 2009 -1.3 ± 0.4
2007-05-17 2454238.479958 ± 3.9e-05 BJD_UTC Turner et al. 2016 0.4 ± 0.1
2007-05-17 2454238.47898 ± 0.00046 HJD_UTC Cáceres et al. 2009 -1.0 ± 0.7
2007-05-15 2454235.8355 ± 0.0001 HJD_UTC Shporer et al. 2009 -0.5 ± 0.1
2007-05-04 2454225.26052 ± 0.0003 HJD_UTC Shporer et al. 2009 0.4 ± 0.4
2007-05-04 2454225.26002 ± 0.00038 HJD_UTC Shporer et al. 2009 -0.3 ± 0.5
2007-05-02 2454222.616 ± 0.001 BJD_UTC Gillon et al. 2007 -0.0 ± 1.4
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