| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 4208 | |
| Constellation | Sculptor | |
| Right ascension | (α) | 00h 44m 26.65s |
| Declination | (δ) | –26° 30′ 56.45″ |
| Distance | 106.6 ly (32.70 pc) |
|
| Spectral type | G5V | |
| Orbital elements | ||
| Semimajor axis | (a) | 1.650±0.096 AU |
| Periastron | (q) | 1.564 AU |
| Apastron | (Q) | 1.736 AU |
| Eccentricity | (e) | 0.052±0.040 |
| Orbital period | (P) | 828.0±8.1 d (2.267 y) |
| Orbital speed | (υ) | 21.75 km/s |
| Argument of periastron |
(ω) | 345° |
| Time of periastron | (T0) | 2,451,040 ±120 JD |
| Semi-amplitude | (K) | 19.06±0.73 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.804±0.073 MJ |
| Discovery information | ||
| Discovery date | 15 October 2001 | |
| Discoverer(s) | Vogt, Butler, Marcy et al. |
|
| Detection method | Doppler Spectroscopy | |
| Discovery site | California and Carnegie Planet Search |
|
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
The extrasolar planet, designated as HD 4208 b, was discovered by the California and Carnegie Planet Search team using the Keck telescope. The planet is probably somewhat less massive than Jupiter, although only its minimum mass is known. It orbits the star at a distance of 1.67 AU, slightly further than Mars orbits the Sun. Eccentricity is very low, meaning that the orbit is remarkably circular.