MDM Observatory 2.4m Telescope Observing Report for 2018 Sep 20

Observer(s): Justice, Terndrup
Institution(s): OSU

Instrument: OSMOS/B

Worked for 9 hours (all night)
Conditions were Photometric most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   Beg: Seeing 1,3 arcsec, Clear, Winds Calm
   Mid: Seeing 1,3 arcsec, Clear, Winds Calm
   End: Seeing 1.3 arcsec, Clear, Winds Calm

Observing Summary:

A very nice night!

We skirted the edge of the humidity limit from 0100 until
sunrise.

There was condensation on the instrument entry window at
sunset, which was easily cured by blowing nitrogen.

The condensation occurred again about 0230, so we
did the nitrogen bit once more and were able to complete the
night's observations.

------------------------------

Submitted on 2018 Sep 21 [5:49:30]