HD 215497 c

HD 215497 c is an extrasolar planet which orbits the G-type main sequence star HD 215497, located approximately 142 light years away in the constellation Tucana. This planet has at least one-thirds the mass of Jupiter and takes 568 days to orbit the star at a semimajor axis of 1.282 AU.^[1] This planet was detected by HARPS on October 19, 2009, together with 29 other planets, including HD 215497 b.

HD 215497 c

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	1.282 AU (191,800,000 km)[1]
Eccentricity	0.49 ± 0.04[1]
Orbital period (sidereal)	567.94 ± 2.70[1] d
Time of periastron	2,455,003.48 ± 5.15[1]
Argument of periastron	45 ± 4[1]
Semi-amplitude	10.10 ± 0.65[1]
Star	HD 215497