

-----------------------------------

auriga

04 Aug 2010 08:32



-----------------------------------

am folosit "Double stars for small telescopes" de Sissy Haas
unde sunt cam 2100 duble listate:

nu Dra: PA: 311, Sep. 63.4", m1 4.9, m2 4.9, "the Dragon's eyes. 60mm - 25x - a pair of brilliant white twins, very wide apart, that shine like sparkling diamonds.
conform http://en.wikipedia.org/wiki/Nu_Draconis, componenta 2  este intr-adevar dubla, dar doar spectroscopic.

