28 Andromedae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 30m 07.36s |
| Declination | +29° 45′ 05.6″ |
| Apparent magnitude (V) | 5.214 |
| Characteristics | |
| Spectral type | A7 III |
| U−B color index | +0.08 |
| B−V color index | +0.26 |
| Variable type | δ Sct |
| Astrometry | |
| Radial velocity (Rv) | −10.3±0.6 km/s |
| Proper motion (μ) | RA: 44.983±0.344 mas/yr Dec.: 55.668±0.176 mas/yr |
| Parallax (π) | 16.3540±0.1743 mas |
| Distance | 199 ± 2 ly (61.1 ± 0.7 pc) |
| Absolute magnitude (MV) | 1.29 |
| Details | |
| Mass | 1.77 M☉ |
| Radius | 3.19 R☉ |
| Luminosity | 25.007 L☉ |
| Surface gravity (log g) | 3.95±0.06 cgs |
| Temperature | 7,335±69 K |
| Metallicity [Fe/H] | −0.09±0.05 dex |
| Rotational velocity (v sin i) | 21±2 km/s |
| Age | 1.159 Gyr |
| Other designations | |
| BD+28°75, HD 2628, HIP 2355, HR 114, SAO 74041, PPM 89834 | |
| Database references | |
| SIMBAD | data |
28 Andromedae (abbreviated 28 And) is a Delta Scuti variable star in the constellation Andromeda. 28 Andromedae is the Flamsteed designation. It also bears the variable star name GN Andromedae. Its apparent magnitude is 5.214, varying by less than 0.1 magnitudes.