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
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