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LTO Report

Kitt Peak Nightly LTO Report For UT: 2014-09-21

Report Time (MST): 04:55                    For access to all LTO-Reports go to:

4 Meter Weather Averages
From: UT = 01:00 (MST=6:00 PM) To: UT = 13:00 (MST=6:00 AM)
Elements Mean High Low AvDev
Air Temperature (°C)
Dewpoint Temperature (°C)
Relative humidity (%)000
Wind Speed (mph)
Wind Direction (°)000
4M Dome Temperature (°C)16.617.515.90.4
4M Dome Dewpoint (°C)13.214.511.30.6
4M Primary Mirror (°C)17.017.316.70.1

Weather Comments: Mostly clear at sunset with humidity around 75%. Some thin clouds started passing through around midnight. Humidity rose after that and hovered around 87% the rest of the night. Other wise calm.
Recognized Hours: ( 9.5 )      18 degree twilight + 0.5 hr.

Observer Information
Telescope Observer Prop. # Instrument Detector Seeing
4 MeterSalzer, Hirschauer - remote 2014B-0461 KOSMOS N/A 0.95
WIYNDeliyannis, Steinhauer - remote 2014B-0463 HYDRA STA1 N/A
2.1 MeterNo Observer --- N/A N/A N/A
FeedNo Observer --- N/A N/A N/A
0.9 MeterNo Observer 2014B-0709 HDI N/A N/A

Time Usage During The Night
Telescope Hours Used Night's Activity   Hours Lost Time Lost
Due To:
Time of
Night (MST)
9.5 Scientific Research      
      9.5 Tele-Control Problem 19:30 - 05:00
0.0 Scientific Research      
0.0 Scientific Research      
0.0 Maintenance      

Observing Status
4 MeterObserver had a problem taking afternoon dome flats, instrument would not take an image. The problem turned out to be the Torrent controller power had somehow turned off. Bill Ball came up after dinner to help relsolve this. Observer still managed to get all callibration. No on-sky time was lost. Seeing was fairly steady around 1 arcsecond and was as good as 0.9 arcseconds after 02:00.
WIYNWhole night lost due to msr #23350, elevation motor problems.
2.1 MeterNot Scheduled
FeedNot Scheduled
0.9 MeterSummer maintenance shutdown.

CommentsUneventful night.

Reported by:Doug Williams

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