| Walter's LogBook | |
| Thu/Fri September 16/17, 1999 |
As usual, I set up on the front porch in Oshawa. It was breezy tonight with a low temperature of +11C -- summer is defintely over. (I had my winter observing clothes on tonight!) The moon was up until after 23:00 and the clouds didn't go away until after 1:00. But then the winds were still a problem: my focus star was dancing all over the CCD subframe! I decided to wait another hour for the winds to die down a bit (which they did). In that hour I did some variable star estimates.
I imaged just one object tonight: M74. This is possibly the dimmest of the Messier objects, but it is pretty, so I went for it. The wind and associated bad seeing resulted in only 110 of the 235 frames I took being of acceptable quality (~47%). Still, the image is not bad. I think the same exposure from the country would be a very nice image (the contrast would be much better).
I did more test shots at dawn:
are all a nice size at f/6.3.
| M 74 | 55½ minutes (111 x 30s) |
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| M 74 in one-shot colour: at the limit of suburban imaging! | |