| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 17m 56.01s [1] |
| Declination | +45° 29′ 20.1″ [1] |
| Apparent magnitude (V) | 6.49 |
| Characteristics | |
| Spectral type | B9p |
| U−B color index | 1.96 |
| B−V color index | 1.58 |
| Variable type | Alpha² CVn |
| Astrometry | |
| Radial velocity (Rv) | -2 km/s |
| Proper motion (μ) | RA: 24.78 ± 0.29 [1] mas/yr Dec.: -10.09 ± 0.31 [1] mas/yr |
| Parallax (π) | 5.56 ± 0.44[1] mas |
| Distance | 590 ± 50 ly (180 ± 10 pc) |
| Absolute magnitude (MV) | 6.451 |
| Details | |
| Mass | 18 M☉ |
| Radius | 7 R☉ |
| Luminosity | 20,000 L☉ |
| Temperature | 10,000–30,000 K |
| Metallicity | ? |
| Rotation | 0.007129363 Year |
| Age | ? years |
| Other designations | |
| Database references | |
| SIMBAD | data |
ET Andromedae is a variable star.