Astronomy:HD 147018 c

Short description: Extrasolar planet in the constellation Triangulum Australe

HD 147018 c

Discovery
Discovered by	Segransan et al.
Discovery site	La Silla Observatory
Discovery date	August 11, 2009
Detection method	radial velocity (CORALIE)
Orbital characteristics
astron|astron|helion}}	2.178 AU (325,800,000 km)
astron|astron|helion}}	1.666 AU (249,200,000 km)
Semi-major axis	1.922 ± 0.039 AU (287,500,000 ± 5,800,000 km)
Eccentricity	0.133 ± 0.011
Orbital period	1008 ± 18 d 2.76 ± 0.049 y
astron|astron|helion}}	55301 ± 22
astron|astron|helion}}	-133.1 ± 6.9
Star	HD 147018

HD 147018 c is a gas giant extrasolar planet which orbits the G-type main sequence star HD 147018, located approximately 140 light years away in the constellation Triangulum Australe. It has mass at least six and a half time more than Jupiter and orbits HD 147018 nearly twice the distance between the Earth and the Sun. This planet is eight times farther away than HD 147018 b. This planet was discovered on August 11, 2009 by radial velocity method.

References

• Segransan (February 2010). "The CORALIE survey for southern extrasolar planets. XVI. Discovery of a planetary system around HD 147018 and of two long period and massive planets orbiting HD 171238 and HD 204313". Astronomy & Astrophysics 511: article A45. doi:10.1051/0004-6361/200912136. Bibcode: 2010A&A...511A..45S.