Otevřená hv.

Visuální jasnost: 9.7

Velikost: 2'

Vzdálenost: 4000pc

Pozn.: Embeded in Cam OB3, disperse association in the outer arm direction. Dominted by two O-type stars, containes 3 very massive stars with masses above 30 Sum masses. The brightest member is variable star MY Cam (9.8-10.1var), an eclipsing binary system of two early-O type main-sequence massive stars with unusually small period, 1.2 days. The stars are so close that they could eventually merge into one massive star one day.

Status: pozorován

Image size: 10' x 10'