Alnilam

What this is

Alnilam is a fixed star the chart engine carries, at magnitude 1.69.

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

1.69

right ascension

84.0534°

declination

-1.2019°

proper motion

+1.49, -1.06 mas, yr