Alpha Ophiuchi

Also known as α Oph, Rasalhague, α Ophiuchi, GJ 681, HIC 86032, HIP 86032, HD 159561, HR 6556

star in the constellation Ophiuchus

Key facts

Constellation: Ophiuchus
Right ascension: 17 34 56.06945
Declination: +12 ° 33 ′ 36.1346 ″
Evolutionary stage: Main sequence
Spectral type: A5IVnn + K5–7 V
U b color index: +0.10
B v color index: +0.15

via Wikipedia infobox

Wikidata facts

Diameter: 4130000
Radius: 2.6
Image: Ophiuchus constellation map.png

Show 14 more facts

spectral class: A5 III
catalog code: WISE J173456.17+123330.2
stellar rotational velocity: 210.0
apparent magnitude: 2.108286
right ascension: 263.73419686427
declination: 12.55900984328
effective temperature: 7798
parallax: 69.84
radial velocity: -37.3
metallicity: -0.16
surface gravity: 7800
absolute magnitude: 1.205
right ascension component of proper motion: 119
declination component of proper motion: -225

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Article

Alpha Ophiuchi (α Ophiuchi, abbreviated Alpha Oph, α Oph), also named Rasalhague /ˈræsəlheɪɡ/, is a binary star and the brightest star in the constellation of Ophiuchus. Five degrees west-north-west of Rasalhague lies Rasalgethi, one of the brightest stars in the nearby constellation Hercules.

Nomenclature