| absmag_v = −0.38[11]
}}{{Starbox detail
| mass = {{nowrap|3.84 ± 0.08}}[12]
| radius = 3[13]
| luminosity = 301[12]
| temperature = 13,121[12]
| metal_fe =
| gravity =
| rotational_velocity = 165[12]
| age_myr =
}}{{Starbox catalog
| names = σ Ari, 43 Arietis, BD+14 480, FK5 1079, HD 17769, HIP 13327, HR 847, SAO 93144.[17]
}}{{Starbox reference
|Simbad=sig+Ari
}}{{Starbox end}}Sigma Arietis, Latinized from σ Arietis, is the Bayer designation for a star in the northern constellation of Aries. It has an apparent visual magnitude of +5.52,[3] which is bright enough for the star to be seen with the naked eye from dark suburban skies. Based upon an annual measured parallax shift of {{nowrap|6.60 ± 0.32 mas}},[ it is approximately {{Convert|494|ly|pc|abbr=off|lk=on}} distant from the Earth.]
Sigma Arietis is a B-type main sequence star with a stellar classification of B7 V.[4] This is a large star with three[13] times the radius of the Sun and 3.8[12] times the Sun's mass. It shines around 301[12] times as brightly as the Sun, with this energy being radiated into space from its outer atmosphere at a scorching hot effective temperature of 13,121 K.[12] It is this heat that gives the star the blue-white hue of a B-type star. Sigma Arietis is spinning at a rapid clip, with a projected rotational velocity of 165 km/s.[12] It is a probable member of the Cas-Tau OB association of stars that share a common motion through space.[26]
References
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2. ^1 2 {{citation | last=Lesh | first=Janet Rountree |date=December 1968 | title=The Kinematics of the Gould Belt: an Expanding Group? | journal=Astrophysical Journal Supplement | volume=17 | page=371 | doi=10.1086/190179 | bibcode=1968ApJS...17..371L | postscript=. }}
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6. ^1 2 {{citation | title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics | last1=Pasinetti Fracassini | display-authors=1 | first1=L. E. | last2=Pastori | first2=L. | last3=Covino | first3=S. | last4=Pozzi | first4=A. | journal=Astronomy and Astrophysics | volume=367 | pages=5211–524 |date=February 2001 | doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P |arxiv = astro-ph/0012289 }}
7. ^1 {{cite simbad | title=sig Ari | accessdate=2012-07-18 | postscript=. }}
8. ^1 {{citation | display-authors=1 | last1=de Zeeuw | first1=P. T. | last2=Hoogerwerf | first2=R. | last3=de Bruijne | first3=J. H. J. | last4=Brown | first4=A. G. A. | last5=Blaauw | first5=A. | title=A HIPPARCOS Census of the Nearby OB Associations | journal=The Astronomical Journal | volume=117 | issue=1 | pages=354–399 |date=January 1999 | doi=10.1086/300682 | bibcode=1999AJ....117..354D | postscript=. |arxiv = astro-ph/9809227 }}