Planet GJ 436 b

Name GJ 436 b
Discovered in 2004
Mass 0.07 (± 0.0052) MJ
Semi-major axis 0.02887 (± 0.00095) AU
Orbital period 2.64394 (± 9.85041e-05) day
Eccentricity 0.1912 ( -0.0571 +0.0449 )
ω 354.4 (± 15.3) deg
Tperi 2452992.1 JD
Radius 0.38 RJ
Inclination 85.8 ( -0.25 +0.25 ) deg;
Update Feb. 20, 2015
Detection Method Primary Transit
Mass Detection Method Radial Velocity
Radius Detection method Theorical
Molecules detectedCO2
CO
H2O
H
Primary transit 2454221.61588 (± 0.00012) JD
Secondary transit
Anomaly angle
impact Parameter b
Time Vr=0
Velocity Semiamplitude K 18.07 (± 1.03) °
Calculated temperature
Measured temperature
Hottest point longitute
Geometric albedo
Surface gravity log(g/gH)
Alternate Names

Observability Predictor

Remarks

11 Oct 2010: No conclusive evidence for molecular features in NICMOS data (Gibson et al. 2010)
21 May 2008: The planet GJ 436 c (Ribas et al. 2008) has been retracted at the Transiting Planet conference in Boston
15 Apr 2008: Transit Light Curve by AXA

Other web-pages

Star

Name GJ 436
Distance 10.2 pc
Spectral type M2.5
Apparent magnitude V 10.68
Mass 0.452 ( -0.012 +0.012 ) MSun
Age 6.0 ( -5.0 +5.0 ) Gyr
Effective temperature 3684.0 ( -55.0 +55.0 ) K
Radius 0.464 ( -0.011 +0.011 ) RSun
Metallicity [Fe/H] -0.32 (± 0.12)
Detected Disc
Magnetic Field
RA2000 11:42:11.0
Dec2000 +26:42:23
Alternate Names
Planetary system 3 planet

More data


Related publications

Benchmarking the power of amateur observatories for the TTV exoplanets detection
2015 BALUEV R., SOKOV E., SHAIDULIN V., SOKOVA I., JONES H. et al.
MNRAS, submitted

Homogeneous studies of transiting extrasolar planets. III. Additional planets and stellar models
2010 SOUTHWORTH J.
MNRAS, 408, 1689
paper   arxiv   ADS  

High Cadence Near Infrared Timing Observations of Extrasolar Planets: I. GJ 436b and XO-1b
2009 CAQCERES C., IVANOV V., MINNITI D., NAEF D., MELO C., MASON E., SELMAN F. & PIETRZYNSKI G.
Astron. & Astrophys., 507, 481
paper

Spitzer Transit and Secondary Eclipse Photometry of GJ 436b
2007 DEMING D., HARRINGTON J., LAUGHLIN G., SEAGER S., NAVARRO S. B., BOWMAN W. C., HORNING K.
ApJ. Letters, 667, L199
paper

The M Dwarf GJ 436 and its Neptune-Mass Planet
2007 MANESS H., MARCY G., FORD E., HAUSCHILDT P., STREVE A., BASRI G., BUTLER P. & VOGT S.
PASP, 119, 90
paper arxiv 

A Hubble Space Telescope transit light curve for GJ436b
2008 BEAN J., BENEDICT F., CHARBONNEAU D., HOMEIER D., TAYLOR D., McARTHUR B., SEIFAHRT A., DREIZLER S. & REINERS A.
Astron. & Astrophys., 486, 1039
paper

The transiting exoplanet host star GJ 436: a test of stellar evolution models in the lower main sequence, and revised planetary parameters
2007 TORRES G.
ApJ. Letters, 671, L65
paper

Metallicities of M Dwarf Planet Hosts from Spectral Synthesis
2006 BEAN J., BENEDICT F. & ENDL M.
ApJ. Letters, 653, L65
paper