10 Arietis

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10 Arietis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Aries
Right ascension 02h 03m 39.34547s[1]
Declination +25° 56′ 07.7129″[1]
Apparent magnitude (V) 5.63[2]
Spectral type F8 IV + F9 V[2]
Radial velocity (Rv)+12.9[3] km/s
Proper motion (μ) RA: +128.01[1] mas/yr
Dec.: +11.19[1] mas/yr
Parallax (π)20.53 ± 0.67[1] mas
Distance159 ± 5 ly
(49 ± 2 pc)
Absolute magnitude (MV)2.21[3]
Period (P)325 yr
Semi-major axis (a)1.39″
Eccentricity (e)0.59
Inclination (i)51°
Longitude of the node (Ω)20.5°
Periastron epoch (T)B1931.6
Argument of periastron (ω)
Metallicity [Fe/H]–0.10[3] dex
Age1.9[3] Gyr
Other designations
ADS 1631, BD+25 341, HD 12558, HIP 9621, HR 605, SAO 75114, WDS 02037+2556AB.[5]
Database references

10 Arietis (abbreviated 10 Ari) is a binary star in the northern constellation of Aries. 10 Arietis is the Flamsteed designation. It has an overall apparent visual magnitude of 5.63 and consists of two F-type stars in orbit about each other. The orbital period is approximately 325 years.[4] based upon an annual parallax shift of 20.53 mas,[1] it is located at a distance of approximately 159 light-years (49 parsecs) from Earth.


  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:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. 
  2. ^ a b Edwards, T. W. (April 1976), "MK classification for visual binary components", Astronomical Journal, 81: 245–249, Bibcode:1976AJ.....81..245E, doi:10.1086/111879. 
  3. ^ a b c d Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982Freely accessible, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191. 
  4. ^ a b Entry, WDS identifier 02037+2556, Sixth Catalog of Orbits of Visual Binary Stars, William I. Hartkopf & Brian D. Mason, U.S. Naval Observatory. Accessed on line August 21, 2008.
  5. ^ "CCDM J02037+2556AB -- Double or multiple star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-18. 

External links[edit]

Coordinates: Sky map 02h 03m 39.344s, +25° 56′ 07.70″