HD 28254
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Dorado |
| Right ascension | 04h 24m 50.70s[1] |
| Declination | –50° 37′ 19.9″[1] |
| Apparent magnitude (V) | 7.71 |
| Characteristics | |
| Spectral type | G5V |
| Apparent magnitude (B) | 8.41 |
| Apparent magnitude (R) | 7.7 |
| Apparent magnitude (J) | 6.395 |
| Apparent magnitude (H) | 6.13 |
| Apparent magnitude (K) | 6.006 |
| B−V color index | 0.70 |
| V−R color index | 0.01 |
| Astrometry | |
| Proper motion (μ) | RA: −67.15±0.59[1] mas/yr Dec.: −144.50±0.53[1] mas/yr |
| Parallax (π) | 18.29 ± 0.53[1] mas |
| Distance | 178 ± 5 ly (55 ± 2 pc) |
| Absolute magnitude (MV) | 3.97 |
| Details | |
| Mass | 0.87 M☉ |
| Radius | 1.78±0.04 R☉ |
| Luminosity | 2.397±0.202 L☉ |
| Surface gravity (log g) | 3.82 cgs |
| Temperature | 5400±100 K |
| Metallicity | 0.36 |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 28254 is an 8th magnitude G-type main sequence star located approximately 178 light years[1] away in the constellation Dorado. This star is larger, cooler, brighter, and less massive than our Sun. Also its metal content is 2.3 times as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥ 1.16+0.10 −0.06 MJ |
2.15+0.04 −0.05 |
1116±26 | 0.81+0.05 −0.02 |
— | — |
See also
- List of extrasolar planets
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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
- ↑ 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″
| ||||||||||||||||||||||||||||||||||