MDM Observatory 1.3m Telescope Observing Report for 2021 Jan 08

Observer(s): Jules Halpern
Institution(s): Columbia U.

Instrument: Templeton

Worked for 11.5 hours (most of the night)
Conditions were Non-Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Beg: Seeing 1.6 arcsec, Overcast, Winds Calm
   Mid: Seeing 1.6 arcsec, Cirrus, Winds Moderate
   End: Seeing 1.8 arcsec, Clear, Winds Light & Variable

Observing Summary:

Clouds cleared around 10pm.  A west wind seemed to cause a
periodic tracking error when pointing west.  But the results
were good anyway.  Here's an interesting observation: 
I observed the same star for several hours on each of three 
nights.  Each night there was an identical diagonal jump in the
image that we attribute to a 'flop' in the MIS guider, for lack
of a better explanation.  These occurred at HA = +2:27, +2:34,
and +2:27 on the three nights, respectively. That must be quite
a balancing act!

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Submitted on 2021 Jan 9 [7:25:07]