MDM Observatory 2.4m Telescope Observing Report for 2012 Dec 05

Observer(s): M.Musin
Institution(s): University of Missouri

Instrument: OSMOS + B4k

Worked for 15 hours (all night)
Conditions were Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Beg: Seeing 1.35 arcsec, Clear, Winds Calm
   Mid: Seeing 1.32 arcsec, Cirrus, Winds Calm
   End: Seeing 1.0 arcsec, Clear, Winds Calm

Observing Summary:

It was a good night overall. We did not have any big problems.
One issue was that for unknown reason when we pointed the guider
to a dim star, it appeared in the corner of the Autoguider 
Image window and when guider tried to put it to the center of 
the window it changed the coordinates of the telescope by -5 . 
It happened 3 times, after this we started choosing brighter 
stars even though they were closer to the FOV of the camera,
so we got some vignetting.

During the night we had to change the focus for several times. 
We started with 4370, then went to 4365, 4350 and ended up with 
4355. The script that we use (focus4k_2012dec_step5.pro) helped
us a lot.

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Submitted on 2012 Dec 6 [7:33:05]