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Gamma Arietis is a well-known binary of similar stars: 4.8, 4.8; PA 360º, separation 7.8".
Lambda Arietis is a wide binary: 4.9, 7.7; PA 46º, separation 37.4".
Gamma Arietis or Mesarthim (origin obscure) is a triple star that includes [638], a binary system with two white A-type main sequence stars, and [640], a K-type star orbiting the binary.
The star gamma Arietis, of fourth magnitude, represents the ram's front foot, and the star delta Arietis, also of fourth magnitude, represents the ram's hind foot.
Reference
* H. A. Rey, The Stars — A New Way To See Them.
MESARTHIM (Gamma Arietis). Shining third among the stars of the flat triangle that make the classical figure of Aries, the Ram (for that reason gaining the Gamma designation), ...
When the Greek astronomer Hipparchus defined the position of the vernal equinox around 130 BC this point lay south of the star Mesartim (Gamma Arietis).
It can be found southeast of Hamal (Alpha Arietis), Sheratan (Beta Arietis), Mesarthim (Gamma Arietis), and spiral galaxy M 74; northeast of Alrescha (Alpha Piscium); and northwest of Lamda, Mu, Xi2, and Nu Ceti, ...
 See also: Constellation, Aries, Sky, Second, S Star
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