The Constellation Bootes

by Dominic Ford
Bootes Bootes
The constellation Bootes. Roll mouse over to see labels.
Source: Stellarium.

Boötes is a large northern constellation, dominated by the fourth brightest star in the whole sky, Arcturus.

Visible in the months around May, it is also home to a further six stars that are brighter than fourth magnitude, and nearly thirty that are visible to the naked eye from a dark site.

It lies well away from the plane of the Milky Way and so does not contain any bright open clusters.

It is, however, home to the ninth-magnitude globular cluster NGC 5466 as well as many faint galaxies.

Boötes is identified as a herdsman, but the origin of his name is unclear. He is commonly represented as Arcas, the son of Zeus and Callisto, who features in the story of Ursa Major the great bear.

Date First Appeared
Sky Area
2.2% of the sky
906.8 square degrees
Messier Objects
Bootes contains no Messier objects
Caldwell Objects
Bootes contains the following Caldwell object: C45.
The following constellations neighbor Bootes: Canes Venatici, Coma Berenices, Corona Borealis, Draco, Hercules, Serpens Caput, Ursa Major, Virgo.
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Brightest Objects in Bootes

Stars Open Clusters Globular Clusters Galaxies
Stars Open Clusters Globular Clusters Galaxies
Arcturus (mag 0.2) NGC 5466 (mag 9.7) NGC 5416 (mag 0.0)
HD (mag 2.5) NGC 5437 (mag 0.0)
Muphrid (mag 2.7) NGC 5482 (mag 0.0)
Izar (mag 2.7) NGC 5504 (mag 0.0)
Seginus (mag 3.0) NGC 5515 (mag 0.0)
δ-Boo (mag 3.5) NGC 5527 (mag 0.0)
Nekkar (mag 3.5) NGC 5538 (mag 0.0)
ρ-Boo (mag 3.6) NGC 5570 (mag 0.0)
υ-Boo (mag 4.0) NGC 5590 (mag 0.0)
θ-Boo (mag 4.1) NGC 5603 (mag 0.0)
λ-Boo (mag 4.2) NGC 5616 (mag 0.0)
Alkalurops (mag 4.3) NGC 5630 (mag 0.0)
ζ-Boo (mag 4.4) NGC 5646 (mag 0.0)
ζ-Boo (mag 4.5) NGC 5657 (mag 0.0)
σ-Boo (mag 4.5) NGC 5675 (mag 0.0)
τ-Boo (mag 4.5) NGC 5686 (mag 0.0)
κ²-Boo (mag 4.5) NGC 5700 (mag 0.0)
ψ-Boo (mag 4.5) NGC 5714 (mag 0.0)
HD (mag 4.5) NGC 5731 (mag 0.0)
O-Boo (mag 4.6) NGC 5751 (mag 0.0)
ε-Boo (mag 4.7) NGC 5762 (mag 0.0)
ξ-Boo (mag 4.7) NGC 5795 (mag 0.0)
ι-Boo (mag 4.7) NGC 5827 (mag 0.0)
ω-Boo (mag 4.8) NGC 5852 (mag 0.0)
A-Boo (mag 4.8) NGC 5886 (mag 0.0)




Color scheme