 An artist's impression of 47 Ursae Majoris b, depicting it as a Jovian-like planet | |
| Discovery | |
|---|---|
| Discovered by | Marcy and Butler et al. |
| Discovery site |  United States |
| Discovery date | 17 January 1996 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| Apastron | 2.17 ± 0.05 AU (324.6 ± 7.5 million km) |
| Periastron | 2.03 ± 0.05 AU (303.7 ± 7.5 million km) |
| 2.10 ± 0.02 AU (314.2 ± 3.0 million km)[1] | |
| Eccentricity | 0.032 ± 0.014[1] |
| 1,078 ± 2[1] d ~2.95 y | |
Average orbital speed | 21.3 ± 0.3 |
| 2,451,917+63 −76[1] | |
| 334 ± 23[1] | |
| Semi-amplitude | 49.00 ± 0.87[2] |
| Star | 47 Ursae Majoris |
| Physical characteristics | |
| Temperature | 200 K |
47 Ursae Majoris b (abbreviated 47 UMa b), formally named Taphao Thong /təˌpaʊ ˈtɒŋ/,[3] is a gas planet and an extrasolar planet approximately 46 light-years from Earth in the constellation of Ursa Major.[4] The planet was discovered located in a long-period orbit around the star 47 Ursae Majoris in January 1996 and as of 2011 it is the innermost of three known planets in its planetary system. It has a mass at least 2.53 times that of Jupiter.
- ^ a b c d e Cite error: The named reference
Gregory2010was invoked but never defined (see the help page). - ^ "Planets Table". Catalog of Nearby Exoplanets. Archived from the original on 21 September 2008. Retrieved 2008-10-04.
- ^ Thai Astronomical Society, Chalawan, Taphao Thong, Taphao Kaew – First Thai Exoworld Names
- ^ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2020-08-15.