Unukalhai

Unukalhai (α Serpentis) is a orange supergiant star in the constellation Serpens. With an apparent magnitude of 2.65 it is the 108th-brightest star in the night sky, and it is about 83 light-years from Earth.

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

ConstellationSerpens
Designationα Serpentis (Alpha Serpentis), HR 5854
Apparent magnitude2.65 (108th brightest)
Spectral typeK2IIIbCN1
Colororange (B−V 1.17)
Distanceabout 83 light-years
Right ascension15 h 44.3 min
Declination+6.43°
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 Unukalhai

Unukalhai is in Serpens. From 40° N it is highest in the south in July evenings, about 56° above the horizon. From 35° S it reaches about 49° in the north. Nearby bright stars: Alphecca (20° away), Arcturus (25° away) and Rasalhague (28° away).

Serpens constellation →

Other named stars in Serpens

GudjaAlya

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