HD 148427
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 16h 28m 28.151s[1] |
| Declination | –13° 23′ 58.69″[1] |
| Apparent magnitude (V) | 6.903 |
| Characteristics | |
| Spectral type | K0IV |
| Apparent magnitude (B) | 7.839 |
| Apparent magnitude (J) | 5.299 |
| Apparent magnitude (H) | 4.875 |
| Apparent magnitude (K) | 4.682 |
| B−V color index | 0.936 |
| Astrometry | |
| Proper motion (μ) | RA: –37.74 ± 0.76[1] mas/yr Dec.: 2.81 ± 0.51[1] mas/yr |
| Parallax (π) | 16.94 ± 0.60 mas[1] |
| Distance | 193 ± 7 ly (59 ± 2 pc) |
| Absolute magnitude (MV) | 3.039 |
| Details | |
| Mass | 1.45 ± 0.06 M☉ |
| Radius | 3.22 ± 0.2 R☉ |
| Luminosity | 6.06 L☉ |
| Surface gravity (log g) | 3.75 cgs |
| Temperature | 5052 ± 44 K |
| Metallicity [Fe/H] | 0.154 ± 0.04 dex |
| Age | 2.5 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 148427 is a 7th magnitude K-type subgiant star located approximately 193 light years away in the constellation Ophiuchus. Its mass is 45% greater than the Sun, it is three times the size and six times more luminous, although its age is two and a half billion years. In August 2009, it was found to have a planet.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥0.96 ± 0.1 MJ | 0.93 ± 0.01 | 331.5 ± 3.0 | 0.16 ± 0.08 | — | — |
References
- ^ a b c d e 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
- ^ a b Fischer, Debra; et al. (2009). "Five planets and an independent confirmation of HD 196885 Ab from Lick Observatory". The Astrophysical Journal. 703 (2): 1545–1556. arXiv:0908.1596. Bibcode:2009ApJ...703.1545F. doi:10.1088/0004-637X/703/2/1545.
See also
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