Astronomy:HD 168443 b
From HandWiki
Short description: Gas giant or brown dwarf orbiting HD 168443
| Discovery | |
|---|---|
| Discovered by | Butler, Marcy et al. |
| Discovery site | Hawaii, United States |
| Discovery date | September 9, 1998 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| 0.29 AU (43,000,000 km) | |
| Eccentricity | 0.529 ± 0.02 |
| Orbital period | 58.116 ± 0.001 d |
| astron|astron|helion}} | 2,451,616.36 ± 0.02 |
| 172.9 | |
| Semi-amplitude | 475.9 ± 1.6 |
| Star | HD 168443 |
HD 168443 b is a planet with a minimum mass seven times as that of Jupiter. Given the high mass, this planet is likely to be a gas giant, or possibly a small brown dwarf depending on the orbital inclination. It orbits closer to its star than Mercury does to the Sun, and its surface temperature is likely to be very high. It was discovered in 1999 using radial velocity measurements taken at the W. M. Keck Observatory in Hawaii.[1]
See also
References
- ↑ Marcy, Geoffrey W. et al. (1999). "Two New Planets in Eccentric Orbits". The Astrophysical Journal 520 (1): 239–247. doi:10.1086/307451. Bibcode: 1999ApJ...520..239M.
External links
- "HD 168443". Exoplanets. http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+168443. Retrieved 2008-09-08.
Coordinates: 
18h 20m 03.9316s, −09° 35′ 44.601″
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