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Gamma Arietis
  CATEGORIES ABOUT GAMMA ARIETIS
   
aries constellation
   
bayer objects
   
arietis, gamma
   
alpha2 canum venaticorum variables
   
triple star systems
   
white main sequence stars
   
type-k stars
   
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  Epoch J20000
  Constell Aries
  Ra 01<sup>h</sup> 53<sup>m</sup> 318<sup>s</sup>
  Dec +19&deg 17' 37"
  Spectral A1pSi
  Appmag V +388
  Dist Ly 204 &plusmn 11
  Dist Pc 63 &plusmn 3
  Names Mesarthim, 5&nbspArietis,<BR/> HR &nbsp545 + HR&nbsp546,<BR/> HD &nbsp11503 + HD&nbsp11502,<BR/> BD +18&deg243, HIP &nbsp8832,<BR/> SAO &nbsp92681 + SAO&nbsp92680,<BR/>GC&nbsp2291 + GC&nbsp2290,<BR/> ADS &nbsp1507, CCDM&nbsp01536+1918


Gamma Arietis (γ Ari / γ Arietis) is a Triple Star System in Constellation Aries . It also has the traditional name '''Mesarthim'''. Mesarthim is 204 Light Year s distant.

The system is composed of a Binary Star with components separated with an Angular distance of 7.7 Arcsecond s (separable in small Telescope s). Both components are white A-type Main Sequence stars and have Apparent Magnitude s of +4.75 and +4.83. The brighter is known as γ² Arietis and the dimmer '''γ¹ Arietis'''. The orbital period of the binary is greater than 5000 years. Orbiting the binary is '''γ Arietis C''', a magnitude +9.6 K-type star located 221 Arcsecond s distant.

The brightest component, γ² Arietis, is classified as an Alpha2 Canum Venaticorum Type Variable Star and its brightness varies by 0.04 magnitudes with a period of 2.61 days.