55 Cancri c

55 Cancri c / Brahe
The planet 55 Cnc c (min mass ~0.17 MJ) in MPL3D
Discovery
Discovered byMarcy et al.
Discovery siteCalifornia, USA
Discovery dateJune 13, 2002
Radial velocity
Orbital characteristics
Apastron0.260 AU (38,900,000 km)
Periastron0.219 AU (32,800,000 km)
0.240 ± 0.00005 AU (35,903,500 ± 7,500 km)[1]
Eccentricity0.086 ± 0.052[1]
44.3446 ± 0.007[1] d
0.121407 y
2,449,989.3385 ± 3.3[1]
77.9 ± 29[1]
Semi-amplitude10.18 ± 0.43[1]
Star55 Cancri A
Radial velocity changes over time of 55 Cancri caused by the orbit of 55 Cancri c.

55 Cancri c (abbreviated 55 Cnc c), formally named Brahe (pronounced /ˈbrɑːh/ or /ˈbrɑː/), is an extrasolar planet in an eccentric orbit around the Sun-like star 55 Cancri A, making one revolution every 44.34 days. It is the third known planet in order of distance from its star. 55 Cancri c was discovered on June 13, 2002, and has a mass roughly half of Saturn.

In July 2014 the International Astronomical Union launched NameExoWorlds, a process for giving proper names to certain exoplanets and their host stars.[2] The process involved public nomination and voting for the new names.[3] In December 2015, the IAU announced the winning name was Brahe for this planet.[4] The winning name was submitted by the Royal Netherlands Association for Meteorology and Astronomy of the Netherlands. It honors the astronomer Tycho Brahe.[5]

  1. ^ a b c d e f Fischer, D.A.; et al. (March 2008). "Five Planets Orbiting 55 Cancri". Astrophysical Journal. 675 (675): 790–801. arXiv:0712.3917. Bibcode:2008ApJ...675..790F. doi:10.1086/525512. S2CID 17083836.
  2. ^ NameExoWorlds: An IAU Worldwide Contest to Name Exoplanets and their Host Stars. IAU.org. 9 July 2014
  3. ^ "NameExoWorlds The Process". Archived from the original on 2015-08-15. Retrieved 2015-09-05.
  4. ^ Final Results of NameExoWorlds Public Vote Released, International Astronomical Union, 15 December 2015.
  5. ^ "NameExoWorlds The Approved Names". Archived from the original on 2018-02-01. Retrieved 2015-12-27.