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Kitt Peak Nightly LTO Report For UT: 2025-11-09

Report Time (MST): 05:52                    For access to all LTO-Reports go to: http://www-kpno.kpno.noirlab.edu/cgi-bin/ltoreport

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)	14.3	15.0	13.2	0.3
Dewpoint Temperature (°C)	-4.5	-2.7	-7.0	0.8
Relative humidity (%)	27	33	23	1.8
Wind Speed (mph)	6.5	11.5	0.7	1.7
Wind Direction (°)	315	83	338	0.9
4M Dome Temperature (°C)	14.0	14.4	13.5	0.2
4M Dome Dewpoint (°C)	-2.7	-0.4	-4.2	0.9
4M Primary Mirror (°C)	14.5	15.0	13.0	0.4

Weather Comments:	25% humidity, 10mph winds and clear skies all night
Recognized Hours:	( 11 )      18 degree twilight + 0.5 hr.

Observer Information

Telescope	Observer	Prop. #	Instrument	Detector	Seeing
4 Meter	LO: Landriau (on site); SOs: Yu (1st half, remote); Osman (2nd half, remote)	---	DESI	N/A	1.0
WIYN	No Observer	2025B-300001	N/A	N/A	N/A
2.1 Meter	No Observer	---	---	N/A	N/A
Feed	No Observer	---	N/A	N/A	N/A
0.9 Meter	No Observer	---	---	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)
4Meter
	10.96	Scientific Research		0.04	Misc. Problems	20:30 - 21:00
WIYN
	11	Shutdown		0	Weather
2Meter
	11	Shutdown		0	Weather
Feed
	0	Scientific Research		0	Weather
W0_9m
	11	Shutdown		0	Weather

Observing Status

4 Meter	DESI Survey Observing. Paused for 3 minutes waiting for the VC Caravan. Seeing measured between 0.8 arcseconds and 1.2 arcseconds.
WIYN	Shutdown for installation of new mirror covers.
2.1 Meter	Not Scheduled
Feed	Not Scheduled
0.9 Meter	Not Scheduled

Comments	A quiet night.

Reported by:	Anthony Paat

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