41 Arietis

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41 Arietis
Diagram showing star positions and boundaries of the Aries constellation and its surroundings
Cercle rouge 100%.svg

Location of 41 Arietis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Aries
Right ascension 02h 49m 59.03324s[1]
Declination +27° 15′ 37.8260″[1]
Apparent magnitude (V) 3.63[2]
Spectral type B8 Vn[3]
U−B color index –0.38[2]
B−V color index –0.10[2]
Radial velocity (Rv) +4[4] km/s
Proper motion (μ) RA: +66.81[1] mas/yr
Dec.: –116.52[1] mas/yr
Parallax (π) 19.69 ± 0.19[1] mas
Distance 166 ± 2 ly
(50.8 ± 0.5 pc)
Mass 3.1±0.1[5] M
Luminosity 160[6] L
Temperature 11900[6] K
Rotational velocity (v sin i) 175[7] km/s
Age 130+10
[5] Myr
Other designations
Bharani, c Arietis, ADS 2159, BD+26 471, FK5 100, HD 17573, HIP 13209, HR 838, SAO 75596.[8]
Database references

41 Arietis (abbreviated 41 Ari) is a binary star[9] in the northern constellation of Aries. 41 Arietis is the Flamsteed designation. It does not possess a Greek letter Bayer designation, since this star was once part of the now-obsolete constellation Musca Borealis, but is sometimes designated c Arietis. With an apparent visual magnitude of 3.63,[2] this star is readily visible to the naked eye. It has an annual parallax shift of 19.69 mas,[1] which indicates the distance to this star is 166 light-years (51 parsecs).

The primary component is a B-type main sequence star with a stellar classification of B8 Vn.[3] The suffix 'n' indicates 'nebulous' absorption lines in the star's spectrum caused by the Doppler effect of rapid rotation. It has a projected rotational velocity of 175 km/s.[7] This is creating an equatorial bulge that is 12% large than the star's polar radius.[10] It is a candidate member of the AB Doradus moving group[6] and has an orbiting companion at an angular separation of 0.3 arcseconds.[9]

41 Ari is part of the Bharani lunar mansion in Hindu astrology. In Chinese, 胃宿 (Wèi Su), meaning Stomach (asterism), refers to an asterism consisting of 41 Arietis, 35 Arietis and 39 Arietis.[11] Consequently, 41 Arietis itself is known as 胃宿三 (Wèi Su sān, English: the Third Star of Stomach.)[12]


  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, Bibcode:2007A&A...474..653V, arXiv:0708.1752Freely accessible, doi:10.1051/0004-6361:20078357. 
  2. ^ a b c d Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J. 
  3. ^ a b Cowley, A. (November 1972), "Spectral classification of the bright B8 stars", Astronomical Journal, 77: 750–755, Bibcode:1972AJ.....77..750C, doi:10.1086/111348. 
  4. ^ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W. 
  5. ^ a b Janson, Markus; et al. (August 2011), "High-contrast Imaging Search for Planets and Brown Dwarfs around the Most Massive Stars in the Solar Neighborhood", The Astrophysical Journal, 736 (2): 89, Bibcode:2011ApJ...736...89J, arXiv:1105.2577Freely accessible, doi:10.1088/0004-637X/736/2/89. 
  6. ^ a b c McCarthy, Kyle; White, Russel J. (June 2012), "The Sizes of the Nearest Young Stars", The Astronomical Journal, 143 (6): 134, Bibcode:2012AJ....143..134M, arXiv:1201.6600Freely accessible, doi:10.1088/0004-6256/143/6/134. 
  7. ^ a b Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal, 573 (1): 359–365, Bibcode:2002ApJ...573..359A, doi:10.1086/340590. 
  8. ^ "41 Ari -- Double or multiple star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-06-24. 
  9. ^ a b Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878Freely accessible, doi:10.1111/j.1365-2966.2008.13596.x. 
  10. ^ van Belle, Gerard T. (March 2012), "Interferometric observations of rapidly rotating stars", The Astronomy and Astrophysics Review, 20 (1): 51, Bibcode:2012A&ARv..20...51V, arXiv:1204.2572Freely accessible, doi:10.1007/s00159-012-0051-2. 
  11. ^ (Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
  12. ^ (Chinese) 白羊座

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