HD 149026
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Hercules |
| Right ascension | 16h 30m 29.61858s |
| Declination | +38° 20′ 50.3090″ |
| Apparent magnitude (V) | 8.15 |
| Characteristics | |
| Spectral type | G0 IV |
| Apparent magnitude (B) | 8.76 |
| B−V color index | 0.611 |
| Astrometry | |
| Radial velocity (Rv) | −17.93±0.13 km/s |
| Proper motion (μ) | RA: −77.963 mas/yr Dec.: 52.682 mas/yr |
| Parallax (π) | 13.1203±0.0162 mas |
| Distance | 248.6 ± 0.3 ly (76.22 ± 0.09 pc) |
| Absolute magnitude (MV) | 3.65±0.12 |
| Details | |
| Mass | 1.345±0.020 M☉ |
| Radius | 1.541+0.046 −0.042 R☉ |
| Luminosity | 3.03+0.20 −0.18 L☉ |
| Surface gravity (log g) | 4.189+0.020 −0.021 cgs |
| Temperature | 6,147±50 K |
| Metallicity [Fe/H] | 0.36±0.05 dex |
| Rotational velocity (v sin i) | 6.0±0.5 km/s |
| Age | 2.6+0.3 −0.2 Gyr |
| Other designations | |
| Ogma, BD+38°2787, HD 149026, HIP 80838, SAO 65349, TOI-2024, TIC 255930614, GSC 03063-01587 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 149026, also named Ogma /ˈɒɡmə/, is a yellow subgiant star approximately 249 light-years from the Sun in the constellation of Hercules. An exoplanet (designated HD 149026 b, later named Smertrios) orbits the star.