MDM Observatory 2.4m Telescope Observing Report for 2010 Jan 24

Observer(s): John Thorstensen
Institution(s): Dartmouth

Instrument: modspec+echelle CCD

Worked for 12 hours (all night)
Conditions were Non-Photometric most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   Beg: Seeing 1 arcsec, Clear, Winds Moderate
   Mid: Seeing 1+ arcsec, Clear, Winds Moderate
   End: Seeing 1+ arcsec, Clear, Winds Light & Variable

Observing Summary:

Almost, but not perfectly clear -- cirrus blew over from 
time to time, but otherwise fine.  Strange night - humidity
fell all night until it was in the single digits, and temperatures
warmed steadily.  At times this led to some memorably awful 
seeing, esp. at high airmass, but for the most part the seeing
was pretty good.  Everything worked fine except for the rotator -
see trouble report.

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Submitted on 2010 Jan 25 [7:39:16]