MDM Observatory 2.4m Telescope Observing Report for 2019 May 10

Observer(s): Oey
Institution(s): Michigan

Instrument: CCDS

Worked for 6 hours (all night)
Conditions were Mixed most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   High Humidity from 21 until 21:30.
   Beg: Cirrus, Winds Calm
   Mid: Cirrus, Winds Calm
   End: Clear, Winds Calm

Observing Summary:

There's a strange vertical shadow on the slit viewer that wasn't there
in the afternoon or early evening.  It is easily confused with
the slit, which has a slight tilt and is thinner and often
invisible.  There's also a dark  black hole  shadown taking
up much of the center of the slit viewer field.  Sometimes
when one can actualyl see things without these features, one
finally sees a black spot near the center of the field that
seems to be bad pixels or something.  These features all obliterate
much of the field obstructing the use of the finder.

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

Submitted on 2019 May 11 [4:37:49]