MDM Observatory 2.4m Telescope Observing Report for 2018 Feb 24

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

Instrument: Modspec + Echelle

Worked for 11 hours (all night)
Conditions were Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Beg: Seeing 1 arcsec, Clear, Winds Calm
   Mid: Seeing 1-1.5 arcsec, Clear, Winds Light & Variable
   End: Seeing 1 arcsec, Clear, Winds Light & Variable

Observing Summary:

Really nice night.  

Some minor glitches. The telescope doesn't always complete slews on the
first attempt.  Also, I rotated to zero using the red/blue
tape fiducial -- at delta = +75 on the meridian -- and found
that the rotator was reading -5 degrees, so the instrument
rotator appears to be having an issue.  I wonder if it might
be position dependent.  Is there a more precise zeropoint
fiducial than the tape?


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Submitted on 2018 Feb 25 [6:57:54]