HD 40307 d
Astronomical discovery
HD 40307 d is an extrasolar planet orbiting the star HD 40307, located 42 light-years from Earth in the direction of the southern constellation Pictor. The planet was discovered by the radial velocity method, using the HARPS apparatus in June... Wikipedia
Orbital period: 20 days
Discoverer: Michel Mayor
Discovered: June 16, 2008
Apparent magnitude (V): 7.17