HD 27631 b

HD 27631 b is an extrasolar planet that has more mass than Jupiter. It orbits 3.25 AU from the star, taking six years to revolve around the parent star HD 27631. Its orbit is eccentric, around 12%.^[1] In 2023, the inclination and true mass of HD 27631 b were determined via astrometry.^[2]

HD 27631 b^[1]

Discovery[1]
Discovered by	Marmier et al.
Discovery site	HARPS
Discovery date	Sept. 13, 2011
Detection method	Doppler spectroscopy
Orbital characteristics[2]
Semi-major axis	3.22+0.065 −0.064 AU
Eccentricity	0.163±0.057
Orbital period (sidereal)	2173+47 −44 d 5.95+0.13 −0.12 yr
Inclination	74°+11° −15° or 106°+15° −11°
Longitude of ascending node	91°+63° −66°
Time of periastron	2456110+158 −147
Argument of periastron	128°+28° −27°
Star	HD 27631
Physical characteristics[2]
Mass	1.56+0.2 −0.15 MJ