HD 2039
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Phoenix |
| Right ascension | 00h 24m 20s |
| Declination | -56° 39′ 00″ |
| Apparent magnitude (V) | 9.01 |
| Distance | 292.9 ly (89.8 pc) |
| Spectral type | G2/G3 IV-V |
| Other designations | |
HD 2039 is a yellow dwarf or yellow subgiant star in the constellation Phoenix. The magnitude is 9, meaning it can only be visible through small telescope or better equipment.
In 2002, a planet was found to be orbiting the star.
Contents |
[edit] HD 2039 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 2.19 ± 0.2 AU |
| Eccentricity | (e) | 0.68 ± 0.15 |
| Orbital period | (P) | 1192.582 ± 150 d |
| Angular distance | (θ) | 24 mas |
| Longitude of periastron |
(ω) | 223° |
| Time of periastron | (T0) | 2449645.48 ± 150 JD |
| Semi-amplitude | (K) | 153 ± 22 m/s |
| Physical characteristics | ||
| Mass | (m) | >4.85 ± 1.7 MJ |
| Discovery information | ||
| Discovery date | 2002 | |
| Discoverer(s) | Tinney, Butler, Marcy | |
| Detection method | Doppler Spectroscopy | |
| Discovery status | Published | |
HD 2039 b is an extrasolar planet orbiting the star HD 2039. It is almost five times as massive as Jupiter and has a very eccentric orbit.
[edit] See also
[edit] References
- Tinney et al. (2003). "Four New Planets Orbiting Metal-enriched Stars". The Astrophysical Journal 587 (1): 423 – 428. doi:.
- Butler et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505 – 522. doi:. (web Preprint)
[edit] External links
- The Extrasolar Planets Encyclopaedia: HD 2039 + HD 2039 b
- Extrasolar Visions: HD 2039 + HD 2039 b
- SIMBAD: HD 2039 + HD 2039 b
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