Rasalhague

Rasalhague (α Ophiuchi) is a white giant star in the constellation Ophiuchus. With an apparent magnitude of 2.08 it is the 58th-brightest star in the night sky.

Finder chart showing where Rasalhague is in the constellation Ophiuchus
Rasalhague (circled) in Ophiuchus, with the surrounding constellations and bright stars.
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Facts

ConstellationOphiuchus
Designationα Ophiuchi (Alpha Ophiuchi), HR 6556
Apparent magnitude2.08 (58th brightest)
Spectral typeA5III
Colorwhite (B−V 0.15)
Distance—
Right ascension17 h 34.9 min
Declination+12.56°
Best monthJuly (at about 9 pm)

Sources: star positions, magnitudes and colors from the Yale Bright Star Catalogue; constellation boundaries and star names from the IAU; areas and distances from Wikidata; stick figures by M. van der Sluys. How the maps are made.

How to find Rasalhague

Rasalhague is in Ophiuchus. From 40° N it is highest in the south in July evenings, about 63° above the horizon. From 35° S it reaches about 42° in the north. Nearby bright stars: Sabik (29° away), Vega (30° away) and Alphecca (32° away).

Ophiuchus constellation →

Other named stars in Ophiuchus

SabikYed PriorCebalraiYed PosteriorMarfik

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