HD 2638 b

HD 2638 b is a planet of the star HD 2638. It is a typical "hot Jupiter", a planet that orbits its parent star in a very tight "torch orbit". The distance to the star is less than 1/20 Earth's distance from the Sun. One orbital revolution lasts only about three and half days.^[1]

HD 2638 b

Discovery
Discovered by	Moutou, Mayor, Bouchy et al.
Discovery site	Geneva
Discovery date	2005
Detection method	Radial velocity
Orbital characteristics
Semi-major axis	0.044 AU (6,600,000 km)
Eccentricity	0
Orbital period (sidereal)	3.4442 ± 0.0002 d
Time of periastron	2,453,323.206 ± 0.002
Argument of periastron	0
Semi-amplitude	67.4 ± 0.4
Star	HD 2638
Physical characteristics
Mass	>0.48 MJ