| 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 |
| Orbit | |
| Primary | HD 148427 |
| Companion | HD 148427 b |
| Period (P) | 331.5 ± 3.0 d (0.9076 yr) |
| Semi-major axis (a) | 0.93 ± 0.01 AU |
| Eccentricity (e) | 0.16 ± 0.08 |
| Inclination (i) | 0.5120+0.1635 −0.1082° |
| Details | |
| HD 148427 | |
| 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 |
| HD 148427 b | |
| Mass | 136.5+37.2 −33.7 MJup |
| Other designations | |
| HD 148427: Timir | |
| HD 148427 b: Tondra | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 148427, formally named Timir,[2] is a 7th-magnitude K-type subgiant star approximately 193 light years away in the constellation Ophiuchus. Its mass is 45% greater than the Sun, and it is three times the size and six times more luminous, although its age is 2½ billion years.