MDM Observatory 2.4m Telescope Observer's Report for 2007 Jun 28

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

Instrument: Modspec + echelle CCD

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

Seeing and Weather:
   Clouds from 2300 until 100.
   Beg: Seeing 1+ arcsec, Clear, Winds Moderate
   Mid: Seeing 1 arcsec, Patchy Clouds, Winds Calm
   End: Seeing 1 arcsec, Clear, Winds Calm

Observing Summary:

Another good night, mostly clear except for some episodes of 
brightly moonlit altocumulus, apparently spat out by activity far
to the east.  Seeing was mostly pretty good but nothing too 
special.  Dome returned about 1 foot from contacts at end, 
otherwise everything worked fine.  

The commercial power failed about 5:30 AM (after I'd closed).  
It went down, then surged 3-4 x for 1/2 second or so, then 
went down all the way.  Generator came on line correctly.  
I thought to check the mirror A/C breaker -- sure enough, it
had tripped, so I reset it.  I could hear the dome exhaust 
fans groan as the A/C came on -- it must draw quite a bit of
current!  Please check the mirror A/C from time to time to be 
sure it's running today.

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Submitted on 2007 Jun 29 [5:35:11]