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Kitt Peak Nightly LTO Report For UT: 2025-11-06

Report Time (MST): 04:58                    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)	15.3	16.1	14.2	0.4
Dewpoint Temperature (°C)	-3.5	-1.0	-9.0	1.3
Relative humidity (%)	27	35	18	2.2
Wind Speed (mph)	16.2	24.6	4.4	4.1
Wind Direction (°)	167	205	266	0.4
4M Dome Temperature (°C)	15.2	16.2	14.2	0.4
4M Dome Dewpoint (°C)	-2.5	-0.7	-6.7	1.2
4M Primary Mirror (°C)	16.7	17.1	16.2	0.2

Weather Comments:	Clear skies and 30% humidity all night. 10mph winds out of the west until 2000 when the winds jumped to 25mph. Winds fell back to 10mph around 0400.
Recognized Hours:	( 11 )      18 degree twilight + 0.5 hr.

Observer Information

Telescope	Observer	Prop. #	Instrument	Detector	Seeing
4 Meter	LO: Landriau (on site); SOs: Lou (1st half, on site); Perez (2nd half, remote)	---	DESI	N/A	1.2
WIYN	No Observer	2025B-300000	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
	10.95	Scientific Research		0.05	Misc. Problems	20:30 - 21:00
WIYN
	11	Shutdown		0	Choose Different
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 0.9 arcseconds and 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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