HD 118508
Star in the constellation Boötes
From Wikipedia, the free encyclopedia
HD 118508 is a suspected variable star in the northern constellation of Boötes. Its apparent magnitude may vary with an amplitude of 0.04, discovered during a search for small-amplitude red variables.[7] It is a red giant about 552 light years away.
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Boötes[1] |
| Right ascension | 13h 36m 59.08233s[2] |
| Declination | +24° 36′ 47.8687″[2] |
| Apparent magnitude (V) | 5.8[3] |
| Characteristics | |
| Evolutionary stage | AGB[4] |
| Spectral type | M2III[5] |
| U−B color index | +1.85[6] |
| B−V color index | +1.58[6] |
| Variable type | suspected[7] |
| Astrometry | |
| Radial velocity (Rv) | −35.69±0.18[3] km/s |
| Proper motion (μ) | RA: −26.654[2] mas/yr Dec.: −2.803[2] mas/yr |
| Parallax (π) | 5.9122±0.0860 mas[2] |
| Distance | 552 ± 8 ly (169 ± 2 pc) |
| Absolute magnitude (MV) | −0.431[8] |
| Details | |
| Mass | 1.1[9] M☉ |
| Radius | 49[10] R☉ |
| Luminosity | 324[11] L☉ |
| Surface gravity (log g) | 1.04[9] cgs |
| Temperature | 3,594[9] K |
| Metallicity [Fe/H] | +0.44[9] dex |
| Other designations | |
| BD+25 2652, FK5 3085, HD 118508, HIP 66417, HR 5123, SAO 82905, NSV 6342 | |
| Database references | |
| SIMBAD | data |
