HD 148427
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 16h 28m 28.1512s |
| Declination | −13° 23′ 58.690″ |
| Apparent magnitude (V) | 6.89 |
| Characteristics | |
| Spectral type | K0III/IV |
| Apparent magnitude (B) | 7.840 |
| Apparent magnitude (J) | 5.299 |
| Apparent magnitude (H) | 4.875 |
| Apparent magnitude (K) | 4.682 |
| B−V color index | 0.950 |
| Astrometry | |
| Radial velocity (Rv) | −34.76±0.12 km/s |
| Proper motion (μ) | RA: −37.413 mas/yr Dec.: +3.049 mas/yr |
| Parallax (π) | 14.2059±0.0206 mas |
| Distance | 229.6 ± 0.3 ly (70.4 ± 0.1 pc) |
| Absolute magnitude (MV) | 3.04 |
| Details | |
| Mass | 1.45±0.06 M☉ |
| Radius | 3.22±0.2 R☉ |
| Luminosity | 6.09±0.75 L☉ |
| Surface gravity (log g) | 3.59±0.10 cgs |
| Temperature | 5052±44 K |
| Metallicity [Fe/H] | +0.154±0.04 dex |
| Rotation | 55.7 days |
| Rotational velocity (v sin i) | 2.13±0.5 km/s |
| Age | 2.5 Gyr |
| Other designations | |
| Timir, BD−13°4437, HD 148427, HIP 80687, SAO 159932, PPM 231736 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 148427, formally named Timir, is a 7th-magnitude star approximately 230 light-years away in the constellation Ophiuchus. It has a spectral type of K0III/IV, indicating a K-type star that is close to becoming a red giant. While some sources describe it as a subgiant, stellar evolution models suggest it is already on the red giant branch. Its mass is 45% greater than the Sun, and it is three times the size and six times more luminous, although its age is 2.5 billion years, younger than the Sun.