| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Hercules |
| Right ascension | 16h 30m 29.6185s[1] |
| Declination | +38° 20′ 50.308″[1] |
| Apparent magnitude (V) | 8.15[2] |
| Characteristics | |
| Spectral type | G0 IV[2] |
| Apparent magnitude (B) | 8.76[3] |
| B−V color index | 0.611 |
| Astrometry | |
| Radial velocity (Rv) | −18.1 ± 0.4[3] km/s |
| Proper motion (μ) | RA: −77.900±0.075[1] mas/yr Dec.: 52.694±0.088[1] mas/yr |
| Parallax (π) | 13.04 ± 0.22 mas[1] |
| Distance | 250 ± 4 ly (77 ± 1 pc) |
| Absolute magnitude (MV) | 3.65 ± 0.12[4] |
| Details | |
| Mass | 1.345 ± 0.020[4] M☉ |
| Radius | 1.541 +0.046 −0.042[4] R☉ |
| Luminosity | 3.03 +0.20 −0.18[4] L☉ |
| Surface gravity (log g) | 4.189 +0.020 −0.021[4] cgs |
| Temperature | 6,147 ± 50[2] K |
| Metallicity [Fe/H] | 0.36 ± 0.05[2] dex |
| Rotational velocity (v sin i) | 6.0 ± 0.5[2] km/s |
| Age | 2.6 +0.3 −0.2[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 149026, also named Ogma /ˈɒɡmə/,[5] is a yellow subgiant star approximately 250 light-years from the Sun in the constellation of Hercules. An extrasolar planet (designated HD 149026 b, later named Smertrios) is believed to orbit the star.
Gaia2016 was invoked but never defined (see the help page).Sato2005 was invoked but never defined (see the help page).Simbad was invoked but never defined (see the help page).Carter2009 was invoked but never defined (see the help page).