| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Boötes |
| Right ascension | 15h02m 06.50862s[1] |
| Declination | +25° 00′ 29.2782″[1] |
| Apparent magnitude (V) | +4.82[2] |
| Characteristics | |
| Spectral type | K4 III[3] |
| U−B color index | +1.83[2] |
| B−V color index | +1.50[2] |
| Astrometry | |
| Radial velocity (Rv) | +12.76±0.15[1] km/s |
| Proper motion (μ) | RA: −5.206[1] mas/yr Dec.: −47.799[1] mas/yr |
| Parallax (π) | 8.7483 ± 0.2241 mas[1] |
| Distance | 373 ± 10 ly (114 ± 3 pc) |
| Absolute magnitude (MV) | −0.41[4] |
| Details | |
| Mass | 1.65[5] M☉ |
| Radius | 39.24+1.19 −4.17[1] R☉ |
| Luminosity | 355±10[1] L☉ |
| Surface gravity (log g) | 1.88±0.24[6] cgs |
| Temperature | 3,962±35[5] K |
| Metallicity [Fe/H] | 0.06±0.08[6] dex |
| Age | 2.99[5] Gyr |
| Other designations | |
ω Boo, 41 Boötis, BD+25° 2861, FK5 3185, HD 133124, HIP 73568, HR 5600, SAO 83624[7] | |
| Database references | |
| SIMBAD | data |
Omega Boötis, its name Latinized from ω Boötis, is a solitary,[8] orange-hued star in the northern constellationofBoötes. It is a dim star but visible to the naked eye with an apparent visual magnitude of +4.82.[2] Based upon an annual parallax shiftof8.75 mas as seen from the Earth, it is located about 373 light years from the Sun. The star is drifting further away with a radial velocity of +13 km/s.[1]
This star is three[5] billion years old with a stellar classification of K4 III,[3] matching an evolved K-type giant star that has consume the supply of hydrogen at its core. It has an estimated 1.65[5] times the mass of the Sun and has expanded to 39[1] times the Sun's radius. The star is radiating 355[1] times the Sun's luminosity from its photosphere at an effective temperature of about 3,962 K.[5]
