| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h54m 55.19994s[1] |
| Declination | +17° 44′ 05.1102″[1] |
| Apparent magnitude (V) | 7.01[2] |
| Characteristics | |
| Spectral type | A5 V[3] |
| U−B color index | +0.03[4] |
| B−V color index | +0.28[4] |
| Astrometry | |
| Radial velocity (Rv) | +3.2 ± 3.6[2] km/s |
| Proper motion (μ) | RA: +46.18[1] mas/yr Dec.: −25.50[1] mas/yr |
| Parallax (π) | 12.07 ± 0.70 mas[1] |
| Distance | 270 ± 20 ly (83 ± 5 pc) |
| Absolute magnitude (MV) | +2.43[5] |
| Details | |
| Luminosity | 8.85[5] L☉ |
| Other designations | |
Rho1 Ari, 44 Arietis, BD+17°454, GC 3492, HD 18091, HIP 13579, SAO 93178.[6] | |
| Database references | |
| SIMBAD | data |
Rho1 Arietis is the Bayer designation for a star in the northern constellationofAries, the ram. It has an apparent visual magnitude of 7.01,[2] making it a challenge to see with the naked eye even under ideal dark-sky conditions. Based upon an annual parallax shift measurement of 12.07 mas,[1] it is 270 light-years (83parsecs) distant from the Earth. It is a white-hued A5 main sequence star.
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