Planet GJ 229 B

Name GJ 229 B
Planet Status Confirmed
Discovered in 1995
Mass 35.0 ( -15.0 +15.0 ) MJ
Mass*sin(i) 1.61971 (± 0.664) MJ
Semi-Major Axis 19.433 ( -6.9 +4.7 ) AU
Orbital Period 52890.0 ( -24055.0 +19639.0 ) day
Eccentricity 0.03 ( -0.03 +0.2 )
ω 180.0 (± 180.0) deg
Tperi
Radius
Inclination
Update 2020-01-09
Detection Method Imaging
Mass Detection Method Spectrum
Radius Detection Method
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K 17.06 ( -5.2 +1.3 ) m/s
Calculated temperature 1200.0 ( -1200.0 +0.0 ) K
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names Gliese 229 B

Star

GJ 229
Name GJ 229
Distance 5.757 (± 0.0004) pc
Spectral type M1 V
Apparent magnitude V 8.125
Mass 0.58 MSun +
Age
Effective temperature 3564.0 K
Radius
Metallicity [Fe/H]
Detected Disc
Magnetic Field
RA2000 06:10:34.6
Dec2000 -21:51:53
Alternate Names
Planetary system
3 planets

Remarks

Gliese 229 is a binary system : Gliese 229 A is a red dwarf with a planet Gliese 229 A b. Gliese 229 B is a brown dwarf

More data


Related publications

Search for Nearby Earth Analogs. II. detection of five new planets, eight planet candidates, and confirmation of three planets around nine nearby M dwarfs
2020 FENG F., BUTLER P., SHECTMAN S., CRANE J., VOGT S. et al.
ApJ. Suppl., 246, 11
paper  arxiv  

Physical Properties of Gliese 229B Based on Newly Determined Carbon and Oxygen Abundances of Gliese 229A
2015 NAKAJIMA T., TSUJI T. & TAKEDA Y.
Astron. J., 150, 53
paper  arxiv   ADS

Bayesian search for low-mass planets around nearby M dwarfs. Estimates for occurrence rate based on global detectability statistics
2014 TUOMI M., JONES H., BARNES J., ANGLADA-ESCUDE G. & JRNKINS J.
MNRAS, 441, 1545
paper  arxiv  

Discovery of a cool brown dwarf
1995 NAKAJIMA T., OPPENHEIMER B. R., KULKARNI S. R., GOLIMOWSKI D. A., MATTHEWS K. & DURRANCE S. T.
Nature, 378, 463
paper