HD 4208 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 4208 | |
| Constellation | Sculptor | |
| Right ascension | (α) | 00h 44m 26.65s[1] |
| Declination | (δ) | –26° 30′ 56.4″[1] |
| Distance | 106 ± 3[1] ly (32.4 ± 0.8[1] pc) | |
| Spectral type | G5V | |
| Orbital elements | ||
| Semi-major 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) | California and Carnegie Planet Search | |
| Discovery method | Doppler Spectroscopy | |
| Discovery site | Keck telescope | |
| Discovery status | Published[2] | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | 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. Its orbital distance is 1.67 AU, slightly further than Mars and its eccentricity is low.[2][3]
References
- 1 2 3 4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry - 1 2 Vogt, Steven S.; et al. (2002). "Ten Low-Mass Companions from the Keck Precision Velocity Survey". The Astrophysical Journal. 568 (1): 352–362. arXiv:astro-ph/0110378. Bibcode:2002ApJ...568..352V. doi:10.1086/338768.
- ↑ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
External links
- "HD 4208". Exoplanets.
Coordinates: 
00h 44m 26.65s, −26° 30′ 56.45″
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