Canada/USA Astronomical Seeing Observation Program

Astronomical-Seeing Observation Details

1. Observer
Steve Koehler
2. Site
N44.44 W93.58 (N4426' W9334')
3. Scope
18 inch F/4.5 Mirror. Open top. Open bottom. Fan cooled: Yes.
4. Time
2003-07-18 23:00:00 CST (GMT -6)
2003-07-19 05:00:00 UTC
5. Observing Conditions
560X. 70.0 up. Was cooling for 2h00m.
Appearance of out-of-focus star: Waves zipping across aperture
6. Seeing Observation
Star Image II (2 out of 5)
8. CommentsI'm still unable to see diffraction rings in focus. My
mirror was about 5 degrees F above ambient. I plan
to install front surface fans, soon, to combat my mirror
heat problems.
Date Entered2003-07-21 16:42:24 UT

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