HD 215497 b

HD 215497 b is an extrasolar planet which orbits the K-type main sequence star HD 215497, located approximately 142 light years away in the constellation Tucana. This planet has at least 6.6 times the mass of Earth.^[1] This planet was detected by HARPS on October 19, 2009, together with 29 other planets, including HD 215497 c.

HD 215497 b

Discovery
Discovered by	Lo Curto et al.
Discovery site	La Silla Observatory
Discovery date	October 19, 2009
Detection method	Radial velocity (HARPS)
Orbital characteristics
Semi-major axis	0.047 AU (7,000,000 km)[1]
Eccentricity	0.16 ± 0.09[1]
Orbital period (sidereal)	3.93404 ± 0.00066[1] d
Time of periastron	2,454,858.95 ± 0.37[1]
Argument of periastron	96 ± 34[1]
Semi-amplitude	2.98 ± 0.34[1]
Star	HD 215497