MDM Observatory 2.4m Telescope Observing Report for 2024 Jun 16

Observer(s): John Thorstensen
Institution(s): Dartmouth

Instrument: OSMOS

Worked for 8 hours (all night)
Conditions were Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Beg: Seeing 1.2 arcsec, Clear, Winds Moderate
   Mid: Seeing 1.2 arcsec, Clear, Winds Moderate
   End: Seeing 1.2 arcsec, Clear, Winds Moderate

Observing Summary:

Another perfectly clear night but breezier.  Seeing was generally
good.  The bug did not appear, for the first time in three nights!

I didn't flag this as a problem, but the non-convergent setting
near the zenith described several nights ago occurred on the last
target of the night, when I tried to set on BD+28 4024 in bright
twilight.  The problem is (again) in dec; after I hit the stop-
sign icon in the DFM control system, and looked for the guide star
with the paddle, the dec readout on the TCS system did not update.

Yet, again, after I got the guide star and took the observation, 
the telescope went to the zenith with no problem. 

A note for purists -- this has always been true, but when you go 
to the zenith using the DFM system it always ends up a minute
or more to the east.  I think they probably don't handle the 
precession since 2000 properly, but I'm too tired to figure it out
now and it's really not important.

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Submitted on 2024 Jun 17 [5:23:30]