Canada/USA Astronomical Seeing Observation Program
Astronomical-Seeing Observation Details
1. Observer
Dick Francini
2. Site
N44.39 W88.12
(N44°23' W88°07')
3. Scope
16 inch F/4.5 Mirror. Open top. Open bottom. Fan cooled: Yes.
4. Time
2008-10-10 23:30:00 GMT
5. Observing Conditions
210X. 40.0° up. Was cooling for 0h30m. Appearance of out-of-focus star: Slow flicker
6. Seeing Observation
Antoniadi II
(4 out of 5)
8. Comments
Jupiter at dusk was excellent with many surface details noted. I would give it a II using the Antoniadi scale, better then expected. Seeing degraded by 1:30 UT on 10-11 to IV on the Antoniadi scale and II on the in-focus star image.