HD 40307 c

HD 40307 c
Discovery
Discovered byMayor et al.
Discovery siteLa Silla Observatory, Chile
Discovery dateJune 16, 2008
radial velocity, using HARPS
Orbital characteristics
0.07990.07590.0839 AU
Eccentricity0.0500.13[1]
9.61849.61359.6234[1] d
Semi-amplitude2.452.172.75[1]
StarHD 40307

HD 40307 c is an extrasolar planet orbiting the star HD 40307, located 42 light-years away in the direction of the southern constellation Pictor. The planet was discovered by the radial velocity method, using the HARPS apparatus, in June 2008. Of the six proposed planets in the HD 40307 star system, it is the third-largest, and has the second-closest orbit from the star.[1] The planet is of interest as this star has relatively low metallicity, supporting a hypothesis that different metallicities in protostars determine what kind of planets they will form.

  1. ^ a b c d Tuomi, Mikko; Anglada-Escudé, Guillem; Gerlach, Enrico; Jones, Hugh R. A.; Reiners, Ansgar; Rivera, Eugenio J.; Vogt, Steven S.; Butler, R. Paul (17 December 2012). "Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD 40307". Astronomy & Astrophysics. 549: A48. arXiv:1211.1617. Bibcode:2013A&A...549A..48T. doi:10.1051/0004-6361/201220268. S2CID 7424216.