Zeta Herculis (ζ Her, ζ Herculis) is a binary star system in the constellation Hercules. The primary star is a sub-giant that is somewhat larger than the Sun and has just begun to evolve away from the main sequence. It is orbited by a smaller and fainter star that is separated from the primary by just over 1 arcsec. The stars orbit each other with a period of 34.5 years and a semi-major axis of 1.36". Stars A & B are separated each other by an av...
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Zeta Herculis
Astronomy
Constellation
Hercules
Hercules is a constellation. It is named after Hercules, the Roman mythological hero adapted from the Greek hero Heracles. Hercules was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is the fifth largest of the...
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