MDM Observatory 2.4m Telescope Observing Report for 2019 Jun 10

Observer(s): Ryan Chornock
Institution(s): Ohio University

Instrument: OSMOS/B

Worked for 9 hours (all night)
Conditions were Non-Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Beg: Seeing 1.75 arcsec, Cirrus, Winds Light & Variable
   Mid: Seeing 1.25 arcsec, Clear, Winds Light & Variable
   End: Seeing 1.5 arcsec, Cirrus, Winds Light & Variable

Observing Summary:

Pretty good night!
Some light cirrus passing by in the first half of the night, but it was mostly clear after about 1am.

No problems to report, although I did want to mention a few things I told Eric. There is starting to be a big pointing offset such that when I go to a new target, the guide star doesn't always appear in the field of view of the guider. You always need to move the telescope west and then the star will move into the field.
I've also noticed that the unguided tracking is not as good as it was. If you turn off guiding, you can watch a star drift.  To move it back, again you always have to move the telescope west. In both cases, there is a consistent sense of direction (move the telescope west).




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Submitted on 2019 Jun 11 [4:45:34]