Discovery | |
---|---|
Discovered by | Marcy et al. |
Discovery site | California, USA |
Discovery date | June 13, 2002 |
Radial velocity | |
Orbital characteristics | |
Apastron | 5.92 AU (886,000,000 km) |
Periastron | 5.63 AU (842,000,000 km) |
5.77 ± 0.11 AU (863,000,000 ± 16,000,000 km)[1] | |
Eccentricity | 0.025 ± 0.03[1] |
5218 ± 230[1] d 14.29 y | |
2,452,500.6 ± 230[1] | |
181.3 ± 32[1] | |
Semi-amplitude | 46.85 ± 1.8[1] |
Star | 55 Cancri A |
55 Cancri d (abbreviated 55 Cnc d), formally named Lipperhey /ˈlɪpərhiː/, is an extrasolar planet in a long-period orbit around the Sun-like star 55 Cancri A. Located at a similar distance from its star as Jupiter is from the Sun, it is the fifth and outermost known planet in its planetary system. 55 Cancri d was discovered on June 13, 2002.