However, his chart was inaccurate as the constellation was not fully visible from the Northern Hemisphere. Argo was more accurately charted and subdivided in 1752 by the French astronomer Nicolas Louis de Lacaille, forming Carina (the keel), Vela (the sails), and Puppis (the poop deck).
It is somewhat concentrated at its center, and its less than 50 stars range moderately in brightness. Located 2 degrees south of Gamma Velorum, NGC 2547 is an open cluster containing around 50 stars of magnitudes 7 to 15. NGC 3201 is a globular cluster discovered by James Dunlop on May 28, 1826.
The three-letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is "Vel". The official constellation boundaries, as set by Eugène Delporte in 1930, are defined by a polygon of 14 segments.
The three-letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is "Vel". The official constellation boundaries, as set by Eugène Delporte in 1930, are defined by a polygon of 14 segments.
As of 2010, is one of only two clusters (including Messier 4) that shows a definite inhomogeneous population. RCW 36 is a star-forming region in Vela, and one of the nearest sites of massive star formation.
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