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55 Cancri f
Extrasolar planet in the constellation Cancer / From Wikipedia, the free encyclopedia
55 Cancri f (abbreviated 55 Cnc f), also designated Rho1 Cancri f and formally named Harriot /ˈhæriət/,[2] is an exoplanet approximately 41 light-years away from Earth in the constellation of Cancer (the Crab). 55 Cancri f is the fourth known planet (in order of distance) from the star 55 Cancri and the first planet to have been given the designation of "f".[3]
Quick Facts Discovery, Discovered by ...
![]() An artist's impression of 55 Cancri f. The three bright dots near its star are the three innermost planets. | |
Discovery | |
---|---|
Discovered by | announced by J. Wisdom published by D. Fischer |
Discovery site | United States |
Discovery date | 11 April 2005 (announced) 6 November 2007 (published) |
Doppler spectroscopy | |
Orbital characteristics | |
Apastron | 0.833 AU (124,600,000 km) |
Periastron | 0.730 AU (109,200,000 km) |
0.781 ± 0.007 AU (116,800,000 ± 1,000,000 km)[1] | |
Eccentricity | 0.2 ± 0.2[1] |
260.00 ± 1.1[1] d 0.7118 y | |
2,450,080.9108 ± 1.1[1] | |
181.1 ± 60[1] | |
Semi-amplitude | 4.879 ± 0.6[1] |
Star | 55 Cancri A |
Physical characteristics | |
Temperature | 200–300 K (−73–27 °C; −100–80 °F) |
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