β Boötis


Beta Boötis is ‘Nikkar’ The Herdsman. This yellow giant forms the top of the kite (or head of the Hunter-Herdsman if you wish). From mu Boötis move to the northwest a little over one field of view.

Beta is the jump-off point to visit a well-known binary:
      Due north two binocular fields is the popular binary known as Struve 1909 (or 44 Boötis). This eccentric and rapidly moving binary is becoming less accessible as its separation has fallen under 2" with a position angle (2015 values) of 61º: orbit. With a combined visual magnitude of 4.8, it's the brightest star in a group of three: binoculars.

The others which make up this trio are also binaries: 47 has an extremely faint companion while the variable star BX Boo is also a binocular accessible binary, Otto Struve 291:
     Otto Struve 291: 6.4, 8.5, 156º, 35.6".

In the northwestern corner of your field of view is 39 Boötis, a telescopic binary with contrasting shades of yellow, a deeper primary and light yellow companion: 6.3, 6.7; 45º, 2.6".


Also nearby is SHJ 191, a binocular binary. With Struve 1909 in the centre of your field, move north one field.
      SHJ 191: 6.9, 7.8; 342º, 40.3".

Back down to beta Boo, now due east--just over one field of view--is the pleasant binocular pair nu1 (white) and nu2 (orange). These two are unrelated; they don't form a true binary, but nevertheless make an attractive pair: binoculars.

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