GJ 436 b
Orbiting GJ 436
GJ 436 b is an exoplanet orbiting the star GJ 436, discovered in 2004 using the Radial Velocity method. It is a Neptune-sized world.
Radius
4.17
Earth radii
Mass
22.10
Earth masses
Orbital Period
2.6
days
Distance
9.8
parsecs
Radius (Earth radii)
4.17
Mass (Earth masses)
22.10
Measured
Equilibrium Temperature
Unknown
Parameter source: Maciejewski et al. 2014
Orbital Period
2.644+0.000−0.000days
Semi-Major Axis
0.0291+0.0015−0.0015au
Planet Mass (Earth masses)
22.10+2.30−2.30
Planet Mass (Jupiter masses)
0.0700+0.0070−0.0070
Eccentricity
0.1383+0.0002−0.0002
Epoch of Periastron
2455959.00days(BJD-TDB)
Argument of Periastron
351.0+0.0−0.0deg
Radial Velocity Semi-Amplitude
17.09+0.22−0.22m/s
Distance from Earth
9.8 pc (~32 ly)
Spectral Type
Unknown
Temperature
Unknown
Mass (Solar)
0.47 M☉
Radius (Solar)
0.46 R☉
Luminosity
Unknown
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
175.5505°, 26.7031°
Discovery Method
Radial Velocity
Discovery Year
2004
Source ID: GJ 436 b
GJ 436 b orbits GJ 436 and was reported in 2004 and was detected with the Radial Velocity method.
Published measurements list a radius of 4.17 Earth radii, a mass of 22.1 Earth masses, and an orbital period of 2.64 days.
Catalog data places the system at about 9.8 parsecs from Earth and 1 known planet in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open GJ 436