 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) |
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]
- ^ a b c d e f Debra A. Fischer; Geoffrey W. Marcy; R. Paul Butler; Steven S. Vogt; Greg Laughlin; Gregory W. Henry; et al. (23 December 2007). "Five Planets Orbiting 55 Cancri". Astrophysical Journal. 675 (1): 790–801. arXiv:0712.3917. Bibcode:2008ApJ...675..790F. doi:10.1086/525512. S2CID 17083836.
- ^ "Mathematics Pronunciation Guide". Archived from the original on 4 September 2019. Retrieved 27 April 2019.
- ^ Shige Abe (12 November 2007). "Researchers Identify First Five-Planet Extrasolar System". NASA Astrobiology. Archived from the original on 16 September 2008. Retrieved 17 September 2008.