HD 4308 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 4308 | |
| Constellation | Tucana | |
| Right ascension | (α) | 00h 44m 39.267s[1] |
| Declination | (δ) | –65° 38′ 58.28″[1] |
| Distance | 71.9 ± 0.5[1] ly (22.1 ± 0.2[1] pc) | |
| Spectral type | G5V | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.115 ± 0.096 AU |
| Periastron | (q) | 0.115 AU |
| Apastron | (Q) | 0.115 AU |
| Eccentricity | (e) | 0.00 ± 0.01 |
| Orbital period | (P) | 15.56 ± 0.02 d (0.04260 y) |
| Orbital speed | (υ) | 80.7 km/s |
| Argument of periastron |
(ω) | 359±47° |
| Time of periastron | (T0) | 2,453,314.70 ±2.0 JD |
| Semi-amplitude | (K) | 4.07 ± 0.2 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.0442 MJ (>14 M⊕) |
| Discovery information | ||
| Discovery date | 22 August 2005 | |
| Discoverer(s) | Udry et al. | |
| Discovery method | Doppler Spectroscopy | |
| Discovery site | California, USA | |
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 4308 b is a low-mass exoplanet orbiting around HD 4308. It is believed to have almost no orbital eccentricity.[2]
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
- ↑ Udry, S.; et al. (2006). "The HARPS search for southern extra-solar planets V. A 14 Earth-masses planet orbiting HD 4308". Astronomy and Astrophysics 447 (1): 361–367. arXiv:astro-ph/0510354. Bibcode:2006A&A...447..361U. doi:10.1051/0004-6361:20054084.
External links
- "HD 4308". Exoplanets.
Coordinates: 
00h 44m 39.2677s, −65° 38′ 58.280″
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