NGC 6193
open cluster in the constellation Ara
NGC 6193 is an open cluster of 27 stars in the constellation of Ara. It is about 3,765 light-years away, and it can be seen by eye from Earth.[1]
NGC 6193 lies at the centre of the Ara OB1 association. The cluster radiates energy to the nearby regions of the nebulosity NGC 6188.
At its centre are two O class multiple star systems within 10" of each other, and a probable binary B0 giant. These are very hot large stars. They are part of the multiple star system HD 150136.[2] There are four stars which are each 36 to 63 times more massive than the Sun, 6 to ten times hotter, and each is more than 10,000 times as bright (luminosity) as the Sun.
References change
- ↑ Dunlop, Storm (2005). Atlas of the Night Sky. HarperCollins. ISBN 0-00-717223-0.
- ↑ Leutenegger, Maurice A. et al 2010. Modeling broadband X-ray absorption of massive star winds. The Astrophysical Journal. 719 (2): 1767–1774. arXiv:1007.0783 . Bibcode:2010ApJ...719.1767L. doi:10.1088/0004-637X/719/2/1767 [1]