σ Coronae Borealis

Sigma CrB is a lovely object in small telescopes (Struve 2032): 5.6, 6.5; 238, 7.2". It 's estimated to have an orbit of about a 1000 years.

In the same field of view are the two nu stars, nu1 and nu2; these two form an attractive, and very wide, optical binary: 5.4, 5.6; 164, 354.7".

A little over half a degree southwest of sigma is Otto Struve 305, a multiple star system:
     AB: a lovely colour-contrast, an orange-yellow primary and a blue companion: 6.4, 10.2; 268, 5.6".
     AC: 6.4, 13.0; 264, 27.8".

All files associated with The Constellations Web Page are
1999-2014 by Richard Dibon-Smith.