Alcor

Alcor (80 Ursae Majoris) is a white main-sequence star in the constellation Ursa Major. With an apparent magnitude of 4.01 it is the 526th-brightest star in the night sky, and it is about 81 light-years from Earth.

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

ConstellationUrsa Major
Designation80 Ursae Majoris, HR 5062
Apparent magnitude4.01 (526th brightest)
Spectral typeA5V
Colorwhite (B−V 0.16)
Distanceabout 81 light-years
Right ascension13 h 25.2 min
Declination+54.99°
Best monthMay (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 Alcor

Alcor is in Ursa Major. From 40° N it never sets; it is highest in the north, about 75° up. From 35° S it reaches about 0° in the north. Nearby bright stars: Mizar (0° away), Alioth (5° away) and Alkaid (7° away).

Ursa Major constellation →

Other named stars in Ursa Major

AliothDubheAlkaidMizarMerakPhecdaTania AustralisTalithaMegrezMuscidaTania BorealisAlula BorealisAlkaphrahTaiyangshouAlula Australis

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