Planet GJ 317 b

Name GJ 317 b
Discovered in 2007
Mass 1.8 (± 0.05) MJ
Semi-major axis 1.15 (± 0.05) AU
Orbital period 691.78 (± 4.7) day
Eccentricity 0.11 (± 0.05)
ω 342.0 (± 10.0) deg
Tperi 2451656.7 (± 35.0) JD
Radius
Inclination 45.0 ( -10.0 +10.0 ) deg;
Update Nov. 14, 2011
Detection Method Radial Velocity
Mass Detection Method
Radius Detection method
Molecules detected
Primary transit
Secondary transit
Anomaly angle
impact Parameter b
Time Vr=0
Velocity Semiamplitude K
Calculated temperature
Measured temperature
Hottest point longitute
Geometric albedo
Surface gravity log(g/gH)
Alternate Names

Observability Predictor

Remarks

14 Nov 2011: With M.sini = 1.8 MJup and i = 45 deg. M = 2.5 0.70.4 M Jup (Anglada-Escudé et al. 2011).
06 Jul. 07: A possible second, yet unconfirmed, planet may be present: GJ 317 c (Johnson et al. 2007). The orbital period of GJ 317 b would then be 673.4 days and the eccentricity 0.25

Star

Name GJ 317
Distance 15.1 (± 0.22) pc
Spectral type M3.5
Apparent magnitude V 12.0
Mass 0.42 (± 0.05) MSun
Age
Effective temperature 3510.0 (± 50.0) K
Radius
Metallicity [Fe/H] 0.36 (± 0.2)
Detected Disc
Magnetic Field
RA2000 08:40:59.0
Dec2000 -23:27:23
Alternate Names
Planetary system 2 planets

More data


Related publications

The Solar Neighborhood. XXXIV. a Search for Planets Orbiting Nearby M Dwarfs Using Astrometry
2014 LURIE J., HENRY T., JAO W.-Ch., QUINN S., WINTERS J. et al.
Astron. J., 148, 91
paper  

Astrometry and radial velocities of the planet host M dwarf GJ 317: new trigonometric distance, metallicity and upper limit to the mass of GJ 317b
2011 ANGLADA-ESCUDE G., BOSS A., WEINBERGER A., THOMPSON I., BUTLER P. & 2 additional authors
ApJ.
arxiv