MDM Observatory 2.4m Telescope Observing Report for 2018 Jan 30

Observer(s): Rupert
Institution(s): MDM

Instrument: OSMOS/R

Worked for 13 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 1.0 arcsec, Clear, Winds Calm
   Mid: Seeing 1.0 arcsec, Clear, Winds Calm
   End: Seeing 1 arcsec, Clear, Winds Calm

Observing Summary:

The accuracy of the new instrument rotator is great!
However, the direction of rotation is switched: CW on
the yellow hand paddle now rotates in the positive
direction, and vice versa. Spent about 30 minutes
looking for a guide star before realizing my struggles
might have to do with this flipped rotator. So I switched 
the sign of the Rotator Angle in JSkyCalc and the angle 
of the guide camera to accommodate this change, and I
was able to find the guide star immediately and get good
tracking.
 
I had to restart the IC, but that resulted in little
loss of time.

There was a period of two hours in the middle where most
of the targets were too close to the moon to obtain decent
exposures. Seeing was better than I've experienced, though!




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Submitted on 2018 Jan 31 [7:25:08]