Generalities: it is a southern  constellation of average extension, with several stars of moderate brightness. Its transit at midnight takes place in February.

Origins and mythology: it is derived from the dismemberment of the big constellation of the Ship Argon, which occupied a big slice of the southern sky. From the Ship Argon  the Sail, the Hull and the Stern were drawn. The Ship Argon was the one used by the Argonautis driven by Jason to go to subtract the precious gold fleece of the sacred ram.

Stars: the Sail contains two stars under  magnitude 2. They are Regor, of blue color, with magnitude 1.78, and Koo She, of magnitude 1.96 and white color. Other three stars have magnitude inferior to three and other nine are under magnitude 4.

Table of stars brighter than magnitude 3.5
 

Star	Proper name	Magnitude	Spectrum	Colour	Distance (light-years)	Notes
Gamma	Regor	1.78	WC7	blue	520
Delta	Koo She	1.96	A0	white	68
Lambda	Al Suhail al-Wazn	2.21 (variable)	K5	orange	490
Kappa		2.50	B2	blue	390
Mu		2.69	G5	yellow	98
N		3.13	K5	orange	146

Other objects: in the Sail several open clusters are present, a quite bright globular cluster and the nebula of Gum ,the rest of the explosion of a supernova .

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