Alcor

Also known as 80 Ursae Majoris, g Ursae Majoris, HD 116842

star in the constellation of Ursa Major

Astronomical data · SIMBAD

Object type: **
Spectral type: A5V+M3-4V
Distance: 82 light-years
Redshift: z = -0.000029686763820757633
Coordinates: RA 201.3064° · Dec 54.9880°

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Key facts

Constellation: Ursa Major
Right ascension: 13 25 13.53783
Declination: +54 ° 59 ′ 16.6548 ″
Apparent magnitude v: +3.99
Spectral type: A5Vn / M3-4

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Encyclopedic overview

Alcor (/ˈælkɔːr/) is a binary star system in the constellation of Ursa Major. It is the fainter companion of Mizar, the two stars forming a naked eye double in the handle of the Big Dipper (or Plough) asterism in Ursa Major. The two lie about 83 light-years away from the Sun, as measured by the Hipparcos astrometry satellite.

Nomenclature

Excerpted from Wikipedia’s “Alcor” article, available under the CC BY-SA 4.0 licence.

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