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Delta Herculis, 65 Herculis

Proper NameSarin
Bayer DesignationDelta Herculis
Flamsteed Number65 Herculis
HR (BSC)6410
Right Ascension17h 15m 2s
Declination+24° 50' 21"
Distance75 light years
23 parsecs
MagnitudeApparent: +3.1
Absolute: +1.3
Spectral ClassA3IV White Subgiant (composite)
G4IV-V Yellow Dwarf (Delta Herculis Ab component)
Optimum VisibilityJune / July
NotesThe central star of the Sarin system is often categorised as a single white subgiant, but in fact this is a composite classification, and more recent analysis suggests that in fact the core of the system may consist of a pair of dwarf stars in a very close mutual orbit.

A system of stars a little over seventy-five light years from the Solar System, in the core of the constellation Hercules. The heart of the Sarin system appears to consist of a close binary pair, with at least one outer companion star, and possibly several others. Sarin was imagined as representing the shoulder of the hero Hercules represented by its home constellation.