Gliese 806

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Gliese 806
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 20h 45m 04.10s
Declination +44° 29′ 56.66″
Apparent magnitude (V) +10.84
Spectral type M1.5V
Distance 40.75 ly
(12.5 pc)
Mass 0.48 M
Radius 0.44 R
Luminosity 0.027 L
Temperature 3540 K
Other designations
HIP 102401, GJ 806, TYC 3178-00633-1, 2MASS J20450403+4429562
Database references

Gliese 806 is a red dwarf star in the constellation of Cygnus, located roughly 41 light years from the Sun. The star is suspected to host a substellar companion yet unconfirmed.

A planetary companion?[edit]

According to Marcy & Benitz (1989)[1] detected a possible periodicity of 416 days, inferring possible presence of a massive planetary object with minimum mass of 11 times that of Jupiter. So far the planet has not been confirmed.

The Gliese 806 planetary system[1]
(in order from star)
Mass Semimajor axis
Orbital period
Eccentricity Inclination Radius
b (unconfirmed) ≥11 MJ 0.878 416 0.2


  1. ^ a b Marcy & Benitz; Benitz, Karsten J. (1989). "A search for substellar companions to low-mass stars". Astrophysical Journal, Part 1. 344 (1): 441–453. Bibcode:1989ApJ...344..441M. doi:10.1086/167812.