Observing 30th August 2010

Only a short session this one, due in part to a bad shoulder. Again, because of the Moon, I stuck to open clusters and went to do an H400 clean up run round Vulpecula.

Conditions: Clear, chilly, waning gibbous moon (around 65% full)
Seeing: Excellent, A1
Transparency: II-III
NELM: Not checked.
Instrument: 12" f/5 Dobsonian, 35mm Televue Panoptic (43x), 22mm Televue Panoptic (69x), 15mm Televue Plossl (101x), UHC filter.

NGC 6882 and 6885, open clusters in Vulpecula - Two for the price of one, in same field of view. Large, irregular pattern of stars with a conspicuous bright white one (20 Vulpeculae) off towards the edge. This is supposed to be two clusters but it's not easy to distinguish one from another. 69x, 101x

NGC 6830, open cluster in Vulpecula - Easy to find as it's fairly near M27. Irregular, compressed group of 20+ stars with many more, fainter, ones in the background. 69x, 101x

NGC 6823, open cluster with nebulosity in Vulpecula - Small, compressed cluster with three stars in a tight diagonal line in centre. Many more fainter stars in cluster. fairly rich.
No nebulosity seen without a filter, but with the UHC filter I can just see some faint nebulosity. One for when the moon's gone. 69x, 101x, UHC filter.

NGC 6802, open cluster in Vulpecula - Easy to find, located immediately next to Cr399. Quite large, fairly rich but needs moderate power to resolve. Looks misty at 69x, but stars begin to appear at 101x. Irregular, elongated north-south. Faint. 69x, 101x.

That finishes off the H400s in Vulpecula - I'd already seen NGC 6940 a while back. It also takes me past the magical 100-object mark, meaning I am just over a quarter of the way through the H400, as I am on 103 objects as I found out last night after a quick count of the ticks on my list.

Harvard 20, open cluster in Sagitta - A scattered group of 20 to 30 stars just SW of M71. Not much to write home about. 43x.

Packed up at 2330 BST as the moon was rising higher and its light was being scattered around the sky more than the previous evening, despite the phase being less.