HD 221246
Star in the open cluster NGC 7686
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HD 221246 or NGC 7686 1 is a star in open cluster NGC 7686, and it belongs to the northern constellation of Andromeda. With an apparent visual magnitude of 6.17,[3] it can be viewed by the naked eye only under very favourable conditions. It has a spectral classification of K3III, meaning it is an evolved orange giant star.[4] Parallax measurements place this star about 1,000 light years away from the Solar System.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda[1] |
| Right ascension | 23h 30m 07.4133s[2] |
| Declination | +49° 07′ 59.323″[2] |
| Apparent magnitude (V) | 6.17[3] |
| Characteristics | |
| Spectral type | K3III[4] |
| U−B color index | 1.71[3] |
| B−V color index | 1.46[3] |
| Astrometry | |
| Radial velocity (Rv) | −8.41±0.15[5] km/s |
| Proper motion (μ) | RA: 28.741±0.100[2] mas/yr Dec.: 3.180±0.087[2] mas/yr |
| Parallax (π) | 3.2290±0.0642 mas[2] |
| Distance | 1,010 ± 20 ly (310 ± 6 pc) |
| Absolute magnitude (MV) | −0.97[1] |
| Details | |
| Mass | 1.4[6] M☉ |
| Radius | 44[7] R☉ |
| Luminosity | 690[6] L☉ |
| Surface gravity (log g) | 1.20[6] cgs |
| Temperature | 4,285[6] K |
| Metallicity [Fe/H] | −0.24±0.10[8] dex |
| Other designations | |
| BD+48°4070, FK5 3882, HD 221246, HIP 115996, HR 8925, NGC 7686 1, SAO 53088 | |
| Database references | |
| SIMBAD | data |