HD 4203 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 4203 | |
| Constellation | Pisces | |
| Right ascension | (α) | 00h 44m 41.20s[1] |
| Declination | (δ) | +20° 26′ 56.1″[1] |
| Distance | 250 ± 20[1] ly (77 ± 6[1] pc) | |
| Spectral type | G5 | |
| Orbital elements | ||
| Semi-major axis | (a) | 2.07 ± 0.13 AU |
| Periastron | (q) | 0.996 AU |
| Apastron | (Q) | 3.14 AU |
| Eccentricity | (e) | 0.519 ± 0.027 |
| Orbital period | (P) | 431.88 ± 0.85 d (1.1824 y) |
| Orbital speed | (υ) | 52.3 km/s |
| Argument of periastron |
(ω) | 329.1 ± 3.1° |
| Time of periastron | (T0) | 2,451,918.9 ± 2.7 JD |
| Semi-amplitude | (K) | 60.3 ± 2.2 m/s |
| Physical characteristics | ||
| Mass | (m) | >1.16 MJ (>369 M⊕) |
| Discovery information | ||
| Discovery date | 15 October 2001 | |
| Discoverer(s) | Vogt et al. | |
| Discovery method | radial velocity | |
| Discovery site | Keck telescope | |
| Discovery status | Published[2] | |
| Other designations | ||
| HIP 3502 b | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 4203 b is an exoplanet more massive than Jupiter. It orbits two times further from the star than Earth to the Sun. The planet takes 1.1824 year to orbit the star very eccentrically from 1.00 AU to 3.14 AU. The planet was discovered by Steve Vogt using the Keck telescope.[2][3]
See also
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 4203". Exoplanets.
Coordinates: 
00h 44m 41.2021s, +20° 26′ 56.138″
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