Delta Arietis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 03h 11m 37.767s |
| Declination | +19° 43′ 36.02″ |
| Apparent magnitude (V) | 4.349 |
| Characteristics | |
| Spectral type | K2 III |
| U−B color index | +0.914 |
| B−V color index | +1.035 |
| R−I color index | 0.51 |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | +23.05±0.20 km/s |
| Proper motion (μ) | RA: +153.871 mas/yr Dec.: –5.586 mas/yr |
| Parallax (π) | 19.7731±0.1592 mas |
| Distance | 165 ± 1 ly (50.6 ± 0.4 pc) |
| Absolute magnitude (MV) | +0.77 |
| Details | |
| Mass | 1.91 M☉ |
| Radius | 10.42±0.97 R☉ |
| Luminosity | 45±6 L☉ |
| Surface gravity (log g) | 2.93 cgs |
| Temperature | 4,810 K |
| Metallicity [Fe/H] | –0.03 dex |
| Rotational velocity (v sin i) | 4.3 km/s |
| Other designations | |
| Botein, Botejn, δ Arietis, 57 Arietis, BD+19°477, FK5 114, GC 3805, HD 19787, HIP 14838, HR 951, SAO 93328, PPM 118897 | |
| Database references | |
| SIMBAD | data |
Delta Arietis is a star in the northern constellation of Aries, positioned 1.8 degrees north of the ecliptic. Its identifier is a Bayer designation that is Latinized from δ Arietis, and abbreviated Delta Ari or δ Ari. This star is officially named Botein, pronounced /ˈboʊtiːn/. The apparent visual magnitude of Delta Arietis is 4.35, so it is visible to the naked eye. It has an annual parallax shift of 19.77 mas; corresponding to a distance of about 165 ly (51 pc) from the Sun. This star is receding from the Sun with a radial velocity of +23 km/s.