MDM Observatory 2.4m Telescope Observing Report for 2014 Feb 03

Observer(s): Seth Cohen
Institution(s): Dartmouth College

Instrument: OSMOS

Worked for 7.5 hours (part of the night)
Conditions were Photometric most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   High Humidity from start until 11:07.
   Beg: Clear, Winds Calm, high humidity
   Mid: Seeing 1 arcsec, Clear, Winds Calm
   End: Seeing 1 arcsec, Clear, Winds Calm

Observing Summary:

The humidity was high at the beginning of the night, but once it
fell, conditions were great!  Seeing was around 1 arcsec all
night.  I did have to close quickly for about an hour and a half
in the middle of the night because the local (and I mean local)
humidity jumped from 70% to 90% due to a cloud sliding directly
into the dome.

The one small problem was as follows.  Starting the previous night,
when I would try to find a guide star, I would have to manually
add a dy of 500 for the guider to find the star I had chosen.
Tonight, sometimes I would have to not only do dy=500, but also
dx=-500.  The need for the dx move would occur seemingly at 
random, though the dy move was always necessary.

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Submitted on 2014 Feb 4 [6:40:14]