HD 28254 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 28254 | |
| Constellation | Dorado | |
| Right ascension | (α) | 04h 24m 50.70s[1] |
| Declination | (δ) | –50° 37′ 19.9″[1] |
| Apparent magnitude | (mV) | 7.71 |
| Distance | 178 ± 5[1] ly (55 ± 2[1] pc) | |
| Spectral type | G5V | |
| Orbital elements | ||
| Semimajor axis | (a) | 2.01 AU (300 Gm) |
| 35.7 mas | ||
| Orbital period | (P) | 1117 d (3.06 y) |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 1.16 MJ |
| Discovery information | ||
| Discovery date | October 19, 2009 | |
| Discoverer(s) | Naef et al. | |
| Discovery method | radial velocity (HARPS) | |
| Discovery site | La Silla Observatory | |
| Discovery status | Published[2] | |
| Other designations | ||
| HIP 20606 b | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 28254 b (also known as HIP 20606 b) is an extrasolar planet which orbits the G-type main sequence star HD 28254, located approximately 178 light years away in the constellation Dorado. This planet has at least seven-sixths the mass of Jupiter and takes over three years to orbit the star at a semimajor axis of 2.01 AU.[2] However unlike most other known exoplanets, its eccentricity is not known, but it is typical that its inclination is not known. This planet was detected by HARPS on October 19, 2009, together with 29 other planets.
References
- ↑ 1.0 1.1 1.2 1.3 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
- ↑ 2.0 2.1 Naef, D. et al. (2010). "The HARPS search for southern extrasolar planets XXIII. 8 planetary companions to low-activity solar-type stars". Astronomy and Astrophysics 523. A15. arXiv:1008.4600. Bibcode:2010A&A...523A..15N. doi:10.1051/0004-6361/200913616.
Coordinates: 
04h 24m 50.7052s, −50° 37′ 19.889″