Contents

Gliese 86 b

Jovian planet orbiting Gliese 86 A

Gliese 86 b

The exoplanet Gliese 86 Ab (min mass ~4 MJ) rendered by Celestia
Discovery
Discovered by	Mayor et al.[1]
Discovery site	France
Discovery date	24 November 1998[2]
Detection method	Doppler spectroscopy
Orbital characteristics
Semi-major axis	0.1177+0.0015 −0.0012 AU[3]
Eccentricity	0.0478±0.0024[3]
Orbital period (sidereal)	15.76491 ± 0.00039[4] d
Time of periastron	2451903.36 ± 0.59[4]
Argument of periastron	269 ± 16[4]
Semi-amplitude	376.7 ± 2.9[4]
Star	Gliese 86
Physical characteristics
Mass	≥4.266+0.11 −0.087 MJ[3]

Gliese 86 b, sometimes referred to as Gliese 86 A b^[3] (so as to distinguish the planet from companion star "B") and/or shortened to Gl 86 b, is an extrasolar planet approximately 35 light-years away in the constellationofEridanus. The planet was discovered orbiting a K-type main-sequence star (Gliese 86A) by French scientists in November 1998.^[2] The planet orbits very close to the star, completing an orbit in 15.78 days.

Preliminary astrometric measurements made with the Hipparcos space probe suggested the planet has an orbital inclination of 164.0° and a mass 15 times that of Jupiter, which would make the object a brown dwarf.^[5] However, further analysis suggests the Hipparcos measurements are not precise enough to reliably determine astrometric orbits of substellar companions, thus the orbital inclination and true mass of the candidate planet remain unknown.^[6]

See also[edit]

• List of exoplanets discovered before 2000

References[edit]

External links[edit]

• "Gliese 86 / HR 637 AB". SolStation. Archived from the original on 2007-08-09. Retrieved 2008-08-02.
• "Gliese 86". Open Exoplanet Catalogue. Archived from the original on 2017-01-07. Retrieved 2017-09-23.