Friday, 27 April 2012

Amazing conjunction!

This would be an impossible conjunction, mainly because of the fact that the bluish star, zeta Boötis is out of the plane of the Solar system. Also, the brightness of Mars and the star is a bit fainter than that of Venus. All these were taken on the evening of Thursday 26th April using the Imaging Source DBK camera with a 2x barlow lens on the Celestron 9.25 inch SCT. Mars was particularly sharp, even at a scale of about 0.25 arc seconds per pixel, as it was nice and high in the sky. Zeta Boötis is a double star challenge, I wanted to see if I could visibly separate two stars less than 1 arc second apart. Given Mars is about 10 arc seconds across, I think I can see a fainter star, just above the main bright one. It's not clear or fully seperated but elongated slightly at what looks like a Position Angle of about 350º. Is this right? I think I had the camera orientated correctly so top is approximately North. I'm now going to check it out, and see how wrong I am (I'm trying to be scientific and not biased about it). Anyway enjoy the lovely composition!
Update on z Boo: I was wrong. It turned out I'd tried to detrail the star a little, just 1 or 2 pixels, but the trail was in fact the pair, and they were equal in brightness on a East West alignment. So I had (unscientifically) assumed my raw data was in need of a correction, and in so doing, hid the possible detection of the second star! It is apparently only 0.5" away. Here's the original pic.

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