MDM Observatory 2.4m Telescope Observing Report for 2021 Dec 10

Observer(s): Thorstensen, Garcia-Soto, and students
Institution(s): Dartmouth

Instrument: OSMOS+B4K

Worked for 4 hours (part of the night)
Conditions were Mixed most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   High Humidity from start until 2 AM.
   Beg: Overcast, Winds Moderate
   Mid: Overcast, Winds Light & Variable
   End: Seeing 1.5 arcsec, Clear, Winds Light & Variable

Observing Summary:

As predicted, high humidity and cloud through most of the night.
In the wee hours, the sky cleared and the humidity dropped 
quickly, and Kitt Peak opened up.  We opened, flushed the dewar
windows with dry nitrogen, and started observing for a 
a productive few hours.  No problems at all, except I noticed
that one of the mirror cover indicators stayed red even when 
the mirror was fully open (I checked); it later turned green,
so I suspect an intermittent switch.

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Submitted on 2021 Dec 11 [6:59:35]