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"Both very young hydrogen-fusing dwarfs only a few million years old, the brighter is a magnificent blue class O (09.5) star, while the lesser is class B (B0.5). The pair orbit every 170 years at a distance of about 90 Astronomical Units. After correction for ultraviolet light from very hot (32,000 and 29,600 Kelvin) surfaces, they respectively radiate at a rate of 35,000 and 30,000 Suns. Temperature and luminosity give masses of 18 and 13.5 times that of the Sun, the sum of nearly 32 solar masses making the close AB pair among the most massive of visual binaries. Together they illuminate their surroundings, causing interstellar gas to glow."

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This and more information can be found here.

Per my last post I used the XT8 and my 13mm and 5mm Stratus with the 2x shorty barlow. Seeing was 7/10 and transparency was 3/5. The image is based on a sketch done at the scope that night and is a digital scope made in Gimp.

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