Alpha Ophiuchi

Starbox begin
name=Alpha Ophiuchi Starbox image


caption=Ras Alhague is the α star in the constellation of Ophiuchus. Starbox observe
epoch=J2000
ra=17^h 34^m 56.1^s
dec=+12° 33′ 36″
appmag_v=2.08
constell=Ophiuchus Starbox character
class=A5 III
b-v=0.15
u-b=0.11
variable=? Starbox astrometry
radial_v=+12.6
prop_mo_ra=110.08
prop_mo_dec=-222.61
parallax=69.84
p_error=0.88
absmag_v=1.30 Starbox detail
mass=2–4
radius=2.5
luminosity=29.19 | temperature=8,500
metal=?
rotation=?
age=? Starbox catalog
names=Ras Alhague, Rasalhague, 55 Ophiuchi, Gl 681, HR 6556, BD +12° 3252, HD 159561, GCTP 4000.00, SAO 102932, FK5 656, HIP 86032.

Alpha Ophiuchi (α Oph / α Ophiuchi) is the brightest star in the constellation Ophiuchus. It also has the traditional name Ras Alhague.

Ras Alhague has an apparent magnitude of +2.08, belongs to the spectral classification A5, and is about 47 light years distant from Earth.

The name Ras Alhague is from the Arabic رأس الحية ("raʾs al-ḥayyah"), meaning "the Head of the Serpent-charmer."