Rho1 Arietis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h 54m 55.205s |
| Declination | +17° 44′ 05.08″ |
| Apparent magnitude (V) | 7.01 |
| Characteristics | |
| Spectral type | A5 V |
| U−B color index | +0.03 |
| B−V color index | +0.28 |
| Astrometry | |
| Radial velocity (Rv) | +3.2±3.6 km/s |
| Proper motion (μ) | RA: +28.985 mas/yr Dec.: −15.890 mas/yr |
| Parallax (π) | 12.5263±0.1441 mas |
| Distance | 260 ± 3 ly (79.8 ± 0.9 pc) |
| Absolute magnitude (MV) | +2.43 |
| Details | |
| Mass | 1.65±0.28 M☉ |
| Radius | 1.76±0.06 R☉ |
| Luminosity | 7.86±0.29 L☉ |
| Surface gravity (log g) | 4.17±0.08 cgs |
| Temperature | 7,289±126 K |
| Other designations | |
| Rho1 Ari, 44 Arietis, BD+17°454, GC 3492, HD 18091, HIP 13579, SAO 93178, PPM 118656, TIC 257918546 | |
| Database references | |
| SIMBAD | data |
Rho1 Arietis is a star in the northern constellation of Aries, the ram. Its name is a Bayer designation that is Latinized from ρ1 Arietis, and abbreviated Rho1 Ari or ρ1 Ari. This star has an apparent visual magnitude of 7.01, making it a challenge to see with the naked eye even under ideal dark-sky conditions. Based upon an annual parallax shift measurement of 12.53 mas, it is approximately 260 light-years (80 parsecs) distant from the Earth.
This is a white-hued A-type main-sequence star with a stellar classification of A5 V. It has 1.7 times the mass of the Sun and 1.8 times the Sun's radius. The star is radiating nearly 8 times the luminosity of the Sun from its photosphere at an effective temperature of 7,289 K.