GAMMA SER (Gamma Serpentis). Part of the "X" structure that makes the head of Serpens (the Serpent), at the top of the western portion of constellation (Serpens Caput), lies otherwise unnamed Gamma Serpentis.
[7787] gamma Serpentis, a yellow-white dwarf, is about 36.3 light-years distant and also known by the name Ainalhai ("the eye of the serpent"). The star has two optical companions.
06 5933 gamma SER 15 56 27.1 +15 39 42 F6V 3.85 0.48 5788 delta SER 15 34 48.0 +10 32 15 F0IV 3.80 0.26 5789 delta SER 15 34 48.1 +10 32 21 F0IV 3.80 0.26 5892 epsilon SER 15 50 48.9 + 4 28 40 A2m 3.71 0.15 6710 zeta SER 18 0 28.8 - 3 41 25 F2IV 4.
The star is located 1.2 degrees ESE of beta Serpentis, nearly midway between beta and gamma Serpentis and very slightly south of a line drawn between them.
Deep Sky Objects: ...
[10] Triple stars that are not all gravitationally bound might comprise a physical binary and an optical companion, such as Beta Cephei, or rarely, a purely optical triple star, such as Gamma Serpentis.
 See also: Star, Serpens, Epsilon, Delta, Period
  
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