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LTO Report

Kitt Peak Nightly LTO Report For UT: 2021-01-26

Report Time (MST): 04:25                    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)-5.3-3.3-6.40.7
Dewpoint Temperature (°C)-5.7-3.4-6.90.7
Relative humidity (%)98100950.9
Wind Speed (mph)14.714.714.70.0
Wind Direction (°)244147300.6
4M Dome Temperature (°C)
4M Dome Dewpoint (°C)-3.7-2.4-4.60.6
4M Primary Mirror (°C)

Weather Comments: Threatening clouds, snow, blowing snow and fog all night. About eight inches accumulated snow - heavy drifting in places. Humidity ~100%. Very windy all night, though wind bird may be frozen.
Recognized Hours: ( 11.25 )      18 degree twilight + 0.5 hr.

Observer Information
Telescope Observer Prop. # Instrument Detector Seeing
4 MeterNo Observer 2018A-0922 DESI N/A N/A
WIYNRajagapol, McBride - remote. 2020B-2006 N/A N/A N/A
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)
0.0 Scientific Research 11.25 Weather 18:00 - 06:30
0.0 Scientific Research 11.25 Weather 18:00 - 06:30
11.25 Shutdown      
0.0 Scientific Research      
11.25 Shutdown      

Observing Status
4 MeterMayall shutdown for dome repair work. Would have lost the entire night to weather. No seeing measurements made.
WIYNClosed all night due to bad weather. However, Bill McBride and Jayadev spent almost 8 hours doing some closed dome pointing map investigations -- many "blind" pointing maps. No seeing measurements made.
2.1 MeterNot Scheduled
FeedNot Scheduled
0.9 MeterWIYN 0.9M shutdown until further notice.

CommentsRock slide reported around 17:00 Monday afternoon, covering most of road between mile 6 and 7. ADOT has been informed, but likely won't get to it until morning. Not a very pleasant night out.

Reported by:Doug Williams

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