HD 16028
Orange giant star in the constellation Andromeda
From Wikipedia, the free encyclopedia
HD 16028 is a star in the constellation Andromeda. Its apparent magnitude is 5.71.[2] Located approximately 225 parsecs (730 ly) distant,[1] it is an orange giant of spectral type K3III,[3] a star that has used up its core hydrogen and has expanded.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 02h 35m 38.7415s[1] |
| Declination | +37° 18′ 44.143″[1] |
| Apparent magnitude (V) | 5.71[2] |
| Characteristics | |
| Spectral type | K3III[3] |
| B−V color index | 1.41[2] |
| Astrometry | |
| Radial velocity (Rv) | −5.48±0.20[1] km/s |
| Proper motion (μ) | RA: −1.454±0.217[1] mas/yr Dec.: −13.822±0.177[1] mas/yr |
| Parallax (π) | 4.4409±0.1180 mas[1] |
| Distance | 730 ± 20 ly (225 ± 6 pc) |
| Details | |
| Radius | 37[4] R☉ |
| Luminosity | 427[1] L☉ |
| Surface gravity (log g) | 1.10[5] cgs |
| Temperature | 4,345[4] K |
| Metallicity [Fe/H] | −0.54[5] dex |
| Other designations | |
| BD+36°519, SAO 55684, HIP 12072, HR 748 | |
| Database references | |
| SIMBAD | data |
Double star catalogues list two stars as optical companions. One has a magnitude of 10.9 and is separated by 16.9 arcseconds. It has been suggested it is related to the primary,[3] but parallax measured by Gaia yields a much greater distance for this star in comparison to HD 16028.[6] The other is even fainter and is separated 45 arcseconds from the primary.[7]