HD 4203 b

HD 4203 b is an exoplanet more massive than Jupiter. It orbits two times further from the star than Earth to the Sun. The planet takes 1.1824 year to orbit the star very eccentrically from 1.00 AU to 3.14 AU. The planet was discovered by Steve Vogt using the Keck telescope.^[1][2]

HD 4203 b

Discovery
Discovered by	Vogt et al.
Discovery site	Keck telescope
Discovery date	15 October 2001
Detection method	radial velocity
Orbital characteristics
Apastron	3.14 AU (470,000,000 km)
Periastron	0.996 AU (149,000,000 km)
Semi-major axis	2.07 ± 0.13 AU (310,000,000 ± 19,000,000 km)
Eccentricity	0.519 ± 0.027
Orbital period (sidereal)	431.88 ± 0.85 d 1.1824 y
Time of periastron	2,451,918.9 ± 2.7
Argument of periastron	329.1 ± 3.1
Semi-amplitude	60.3 ± 2.2
Star	HD 4203
Physical characteristics
Mass	>1.16 MJ (>369 M🜨)

See also

• HD 4208 b
• HD 4308 b