Rho1 Arietis

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. It is a white-hued A5 main sequence star.

For other stars with this Bayer designation, see ρ 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]
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[1] mas
Distance270 ± 20 ly
(83 ± 5 pc)
Absolute magnitude (MV)+2.43[5]
Details
Luminosity8.85[5] L☉
Other designations
Rho1 Ari, 44 Arietis, BD+17°454, GC 3492, HD 18091, HIP 13579, SAO 93178.[6]
Database references
SIMBADdata

References
  1. van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. 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, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065.
  3. Andersson, B.-G.; Idzi, R.; Uomoto, Alan; Wannier, P. G.; Chen, B.; Jorgensen, A. M. (2002). "A Spectroscopic and Photometric Survey of Stars in the Field of L1457: A New Distance Determination". The Astronomical Journal. 124 (4): 2164. Bibcode:2002AJ....124.2164A. doi:10.1086/342541.
  4. Oja, T. (1987). "UBV photometry of stars whose positions are accurately known". Astronomy and Astrophysics Supplement Series. 71: 561. Bibcode:1987A&AS...71..561O.
  5. Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
  6. "44 Ari -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-08-08.


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