HD 27894 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 27894 | |
| Constellation | Reticulum | |
| Right ascension | (α) | 04h 20m 47.0473s |
| Declination | (δ) | –59° 24′ 39.014″ |
| Distance | 138.1 ly (42.37 pc) | |
| Spectral type | K2V | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.1221±0.0071 AU |
| Periastron | (q) | 0.116 AU |
| Apastron | (Q) | 0.128 AU |
| Eccentricity | (e) | 0.049±0.08 |
| Orbital period | (P) | 17.991±0.007 d (0.049256 y) |
| Orbital speed | (υ) | 74.1 km/s |
| Argument of periastron |
(ω) | 132.9±9.7° |
| Time of periastron | (T0) | 2,453,275.46±0.48 JD |
| Semi-amplitude | (K) | 58.1±0.5 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.618±0.088 MJ (>196 M⊕) |
| Discovery information | ||
| Discovery date | 15 Feb 2005 | |
| Discoverer(s) | Moutou, Mayor, Bouchy et al. | |
| Discovery method | Radial velocity | |
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 27894 b is a gas giant with a mass at least two thirds that of Jupiter, or twice that of Saturn. The distance from the planet to the star is one third compared that of Mercury from our Sun, and it takes almost exactly 18 days to complete one roughly circular orbit.[1]
References
- ↑ Moutou, C.; et al. (2005). "The HARPS search for southern extra-solar planets IV. Three close-in planets around HD 2638, HD 27894 and HD 63454". Astronomy and Astrophysics. 439 (1): 367–373. arXiv:1411.7048. Bibcode:2005A&A...439..367M. doi:10.1051/0004-6361:20052826.
External links
- "HD 27894". Exoplanets.
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