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Theta Ophiuchi
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ophiuchus
Right ascension 17h 22m 00.58s
Declination -24° 59' 58.2"
Apparent magnitude (V) +3.27
Absolute magnitude (V) -2.92
Distance 563 ly
(172.70 pc)
Spectral type B2IV
Other designations
Kaki, 42 Ophiuchi, HR 6453, HD 157056, CD -24 13292, HIP 84970, SAO 185320, FK5 644, GC 23451

Theta Ophiuchi (θ Oph / θ Ophiuchi) is a Class B2, third-magnitude star in the constellation Ophiuchus. It sometimes called by the Arabic name Imad, meaning "pillar", perhaps referring to one of the pillars upon which the Snake Charmer الحواء Al Hawwa is standing, or it may refer to the Pillar of Moral and Spiritual Fortitude portrayed within southern Ophiuchus and part of Scorpius by the ancient Arabs. Another name is Kaki for "lower leg" or "foot".

Theta Ophiuchi is a variable star of the Beta Cephei type, located about 565 light-years from Earth.


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