MDM Observatory 2.4m Telescope Observing Report for 2017 Jun 21

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

Instrument: modspec + echelle CCD

Worked for 8 hours (all night)
Conditions were Non-Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Beg: Seeing 1+ arcsec, Cirrus, Winds Light & Variable
   Mid: Seeing 0.8 arcsec, Cirrus, Winds Light & Variable
   End: Seeing 1-2 arcsec, Clear, Winds Light & Variable

Observing Summary:

Another dubious-looking afternoon with lots of cirrus pumped
up by storms to the east, but these dissipated in late afternoon
and gave a relatively clear night.  Still quite a bit of 
smoke around - the sun was dim and red at sunset.  Seeing was
excellent for a while, but the temperature dropped several 
degrees around 2 AM, and the seeing became variable after that. 
The guide probe and dome both behaved themselves.

Incidentally, my seeing estimates are guesses.

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Submitted on 2017 Jun 22 [5:13:53]