Alcor

What this is

Alcor is a fixed star the chart engine carries, at magnitude 3.99.

What it governs

The catalogue holds this star's position and its own motion, not a body of lore about it — a star's apparent place is its J2000 position carried forward and referred to the ecliptic of the date, exactly as a planet's is.

Correspondences

magnitude

3.99

right ascension

201.3064°

declination

54.9880°

proper motion

+120.35, -16.94 mas, yr