Rho1 Arietis

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For other star systems with this Bayer designation, see Rho Arietis.
Rho1 Arietis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Aries
Right ascension 02h 54m 55.19994s[1]
Declination +17° 44′ 05.1102″[1]
Apparent magnitude (V) 7.01[2]
Spectral type A3[3]
B−V color index 0.6[3]
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[1] mas
Distance 270 ± 20 ly
(83 ± 5 pc)
Other designations
44 Arietis, BD+17 454, GC 3492, HD 18091, HIP 13579, SAO 93178.[3]

Rho1 Arietis is the Bayer designation for a star in the northern constellation of Aries, 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 (83 parsecs) distant from the Earth. This is a white-hued, A-type star of unknown luminosity class.


  1. ^ a b c d e f van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752free to read, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. 
  2. ^ a b c Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065. 
  3. ^ a b c "44 Ari -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-08-08. 

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