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LTO Report

Kitt Peak Nightly LTO Report For UT: 2021-04-16

Report Time (MST): 04:35                    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)8.511.26.91.0
Dewpoint Temperature (°C)-10.4-5.0-14.42.2
Relative humidity (%)2540154.1
Wind Speed (mph)
Wind Direction (°)000
4M Dome Temperature (°C)
4M Dome Dewpoint (°C)-8.3-4.9-10.51.5
4M Primary Mirror (°C)

Weather Comments: 20% humidity and 10mph winds all night. Winds began the night out of the south and slowly shifted through the east and towards north as the night went on. Mostly cloudy all night with thin annoying clouds to start out, but they got thicker starting around 0100.
Recognized Hours: ( 8.5 )      18 degree twilight + 0.5 hr.

Observer Information
Telescope Observer Prop. # Instrument Detector Seeing
4 MeterLandriau (on site), Della Costa, Gordon, Palmese --- DESI N/A 1.4
WIYNKotulla -remote- 2021A-0401 ODI N/A 1.0
2.1 MeterNo Observer --- N/A N/A N/A
FeedNo Observer --- N/A N/A N/A
0.9 MeterNo Observer --- N/A 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)
3.5 Scientific Research   5.0 Weather 19:00 - 06:00
3.5 Scientific Research 5.0 Weather 20:00 - 05:00
8.5 Shutdown      
0.0 Scientific Research      
8.5 Shutdown      

Observing Status
4 MeterDESI Survey Validation. Lost 5 hours to clouds. Seeing measured between 1.1 arcseconds and 2 arcseconds
WIYNNo technical problems. Lost 5 hours to clouds. Seeing measured between 0.8 arcseconds and 1.4 arcseconds.
2.1 MeterNot Scheduled
FeedNot Scheduled
0.9 MeterWIYN 0.9M shutdown until further notice.

CommentsA cloudy night.

Reported by:Amy Robertson

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