Zeta Ophiuchi

Starbox begin
name=Zeta Ophiuchi Starbox observe
epoch=J2000
ra=16^h 37^m 09.5^s
dec=-10° 34′ 01.4″
appmag_v=2.54
constell=Ophiuchus Starbox character
class=O9 III
b-v=0.02
u-b=-0.86
variable=Gamma Cass. Starbox astrometry
radial_v=-15
prop_mo_ra=13.07
prop_mo_dec=25.44
parallax=7.12
p_error=0.71
dist_ly=458
dist_pc=140
absmag_v=-3.20 Starbox detail
mass=20
radius=8
luminosity=68,000 | temperature=33,500
metal=titanium
rotation=380 km/s.
age=4 × 10⁶ Starbox catalog
names=13 Oph, HR 6175, BD -10°4350, HD 149757, SAO 160006, FK5 622, HIP 81377.

Zeta Ophiuchi (ζ Oph / ζ Ophiuchi) is a star located in the constellation of Ophiuchus. Unlike most of the brighter stars in the sky, ζ Ophiuchi does not have a proper name, although it may have been referred to as Hán (韓) by the Chinese. Although ζ Ophiuchi is a hot blue giant star it appears reddish due to interstellar dust that absorbs much of blue light. In fact, were it not for this dust, ζ Ophiuchi would shine several times brighter and be among the very brightest visible. ζ Ophiuchi is roughly half way through the initial phase of its stellar evolution and will within the next few million years expand into a supergiant star before ending its life in a spectacular supernova.

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