HD 168443 b

HD 168443 b is a planet with a minimum mass seven times as that of Jupiter. Given the high mass, this planet is likely to be a gas giant, or possibly a small brown dwarf depending on the orbital inclination. It orbits closer to its star than Mercury does to the Sun, and its surface temperature is likely to be very high. It was discovered in 1999 using radial velocity measurements taken at the W. M. Keck Observatory in Hawaii.^[1]

HD 168443 b

Discovery
Discovered by	Butler, Marcy et al.
Discovery site	Hawaii, United States
Discovery date	September 9, 1998
Detection method	Doppler spectroscopy
Orbital characteristics
Semi-major axis	0.29 AU (43,000,000 km)
Eccentricity	0.529 ± 0.02
Orbital period (sidereal)	58.116 ± 0.001 d
Time of periastron	2,451,616.36 ± 0.02
Argument of periastron	172.9
Semi-amplitude	475.9 ± 1.6
Star	HD 168443

See also

• List of exoplanets discovered before 2000