MDM Observatory 2.4m Telescope Observing Report for 2025 Oct 21

Observer(s): Jiangtao Li, Haikun Xue, Junle Wang
Institution(s): Michigan

Instrument: OSMOS

Worked for 5 hours (first half of the night)
Conditions were Mixed most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   Clouds from 00:30 until 7:00.
   Beg: Cirrus, Winds Calm
   Mid: Clear, Winds Calm
   End: Overcast, Winds Calm

Observing Summary:

Still cannot find the guiding star even after adding 200 offset in
x direction. It may be a problem that the x position of the guide 
camera does not move. We tried a method to select a guide star from
JSkyCalc with small x values (on the left) and move the guide scope
manually to the south. We successfully found the guide star of one
object, but didn't test this method for other objects because of
the weather.

Another problem is the sudden  jump  of the telescope pointing 
(in the W-E direction for about 15 arcsec) near the meridian. 
This appears twice for one object located near the meridian.

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Submitted on 2025 Oct 22 [1:22:30]