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Fri/Sat March 31/April 1, 2000

Part 1: Thu/Fri March 30/31

Despite a weather forecast for Thu/Fri night (last night) of variable clouds it turned out to be clear all night! I went to bed at 8pm and got up at 2am. Setting up the scope, I did a couple hours of variable star observing until moonrise at around a quarter after four. The forecast for Friday night was now for clear skies so I left the scope set up in the backyard.

Part 2: Fri/Sat March/April 31/1

With the scope still set up from last night, I refined the polar alignment for imaging and had it perfect after only three iterations! My weapon of choice tonight was the one-shot colour camera. I set up the computer in the garage (it is much warmer that way!) and ran cables to the scope outside.

My focus was down to 1.8 by 1.6 pixels -- excellent! I imaged M82 and found the scope tracked 101/110 30 second shots perfectly! Wow, love those high declination areas! Next, I imaged M106 and tracked 87/104 shots.

Next I went to M3. I had it almost perfectly centered and ready to go when I decided to give one final tweak to the centering. Going out to the scope I inadvertantly stepped on the camera cable, giving the scope a good yank. It took some fiddling around to get M3 back, but I carried on. There was just one problem: all the shots were trailing in dec! As it turns out, the yank I gave the scope ruined the alignment and I had to re-align it! Oh well, at least I hadn't broken anything! By the time I had the scope aligned (about 3:30am), cloud moved in and ended the session.

The low temperature for the night was +2C (decidedly warmer in the garage!). My computer's motherboard comes with temperature monitors for CPU and board. Here is the temperature data:

Indoors Outdoors
CPU 55C 37C
Motherboard 31C 15C

The sky was rather bright all night (even for Oshawa). Coma Berenices was at the edge of naked eye visibility. It's nice how the CCD can cut through the crap!

M 82 50 minutes (100 x 30s)
M 82, 50 minutes at f/6.3
M 82 (10" f/6.3 LX200).

M 106 43½ minutes (87 x 30s)
M 106, 43.5 minutes at f/6.3
106 (10" f/6.3 LX200).