Alpha Ophiuchi
Sign in to saveAlso 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
~5 min read
Encyclopedic overview
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
Excerpted from Wikipedia’s “Alpha Ophiuchi” article, available under the CC BY-SA 4.0 licence.