55 Cancri Af
An artist's impression of 55 Cancri Af. 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 (124.6 million km) |
| Periastron | 0.730 AU (109.2 million km) |
| 0.781 ± 0.007 AU (116.8 ± 1.0 million km) | |
| Eccentricity | 0.2 ± 0.2 |
| 260.00 ± 1.1 d 0.7118 y | |
| 2,450,080.9108 ± 1.1 | |
| 181.1 ± 60 | |
| Semi-amplitude | 4.879 ± 0.6 |
| Star | 55 Cancri A |
| Physical characteristics | |
| Temperature | 200–300 K (−73–27 °C; −100–80 °F) |
55 Cancri Af (abbreviated 55 Cnc Af), also designated Rho1 Cancri f and formally named Harriot /ˈhæriət/, is an exoplanet approximately 41 light-years away from Earth in the constellation of Cancer (the Crab). 55 Cancri Af is the fourth-known planet (in order of distance) from the star 55 Cancri A and the first planet to have been given the designation of "f".