vendredi 5 septembre 2008

Triangulum 3

Triangulum lies just to the north of Aries. In antiquity its distinctive shape of three stars was called Deltoton.
Despite its small size it contains one of Messier's objects, a faint face-on spiral galaxy (see below). Triangulum's stars are even fainter than Aries'.

Double stars:
6 Trianguli [also listed sometimes as iota Tri] is an attractive binary with colour contrast, yellow and blue: 5.3, 6.9; PA 71º and separation 3.9".

Variable stars:
R Trianguli is a long-period variable ranging from 5.4 to 12.6 every 266.9 days. In 2000 the maximum should occur around the first or second week of December.

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