MDM Observatory 2.4m Telescope Observing Report for 2010 Apr 21

Observer(s): Matthias Dietrich
Institution(s): OSU

Instrument: CCDS

Worked for 4 hours (first half of the night)
Conditions were Non-Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   High Humidity from 02:00 until 5:00.
   Beg: Seeing 3-4 arcsec, Patchy Clouds, Winds Calm, overcast ~21:30
   Mid: Seeing 2 arcsec, Cirrus, Winds Calm, at ~2:00 hum. >85%
   End: Cirrus, Winds Calm, high humidity >85%

Observing Summary:

At the beginning of the night the sky was basically overcast. 
At around 21:30h the sky had cleared up - open dome. Five 
targets and two standard stars were observed before the humidity
was exceeding 85% at around 2:00h, the dome was closed. For the 
rest of the night the humidity was above 85% up to 93% at the 
end of the night. The seeing was quite bad at the beginning of 
the night with about ~3 to ~4 arcsec. It improved to about ~2 
arcsec around midnight.
The pointing of the telescope was with 10 arcsec and the auto-
guider worked fine.

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Submitted on 2010 Apr 22 [5:01:49]