Posts tagged 'M76'

Observing Report 2nd-3rd and 5th-6th November 2012 (Back in business)

Posted by on November 14th 2012 in Astrostuff, Observing Reports

Having brought the observatory back to full operational status after replacing the roof that was trashed by the hailstorm, I thought I'd better get out there and actually use it. I managed a couple of sessions of observing during a run of four clear nights, and used them for some experimentation and equipment tests. I'd fitted a better focuser to the 6" R-C, the new one's a monorail or linear-bearing focuser, it has much better stability than the original Crayford which means less flexing of the optical train under the weight of the coolbox-clad camera. This in turn means better auto-guiding and hence a much-reduced tendency for stars to appear elongated.

Anyway, less of the techy stuff. Visual targets were the Moon and Jupiter, both were putting on a fine display in the clear skies. Imaging-wise I managed to bag a couple more Messier Objects - M47 and M76. Both presented problems - M47 was so low that for some of the time I was imaging through the topmost branches of a tree that belongs to a neighbour three gardens away; and M67 is such a dim and small thing that I didn't take enough pics to capture all of the detail, so I'll have to gather some additional subs sometime soon. Pics and details as follows:

M47 (aka NGC2422), an open cluster in the constellation Puppis.
Subs: 18 light @ 300s, darks and bias frames, ISO800.
1000D on the 6" R-C, guided with PHD.

M76 (aka NGC650/651, The Little Dumbbell Nebula), a planetary nebula in the constellation Perseus.
Subs: 18 light @ 300s, darks and bias frames, ISO800.
1000D on the 6" R-C, guided with PHD.

As above, cropped and enhanced.

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