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Kitt Peak Nightly LTO Report For UT: 2026-07-12

Report Time (MST): 03:24                    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)	20.5	25.1	18.2	1.7
Dewpoint Temperature (°C)	9.9	11.6	5.8	1.2
Relative humidity (%)	41	47	33	1.2
Wind Speed (mph)	18.1	29.3	5.1	5.3
Wind Direction (°)	301	185	299	4.4
4M Dome Temperature (°C)	22.4	25.7	20.4	1.5
4M Dome Dewpoint (°C)	10.4	11.5	8.6	0.6
4M Primary Mirror (°C)	19.9	20.1	19.4	0.1

Weather Comments:	Rain and threatening clouds throughout the night. Wind ranged from 5.1mph-35mph, with a median around 20mph. Wind direction was variable. Relative humidity ranged from 39%-66%, with a median around 50%.
Recognized Hours:	( 7.25 )      18 degree twilight + 0.5 hr.

Observer Information

Telescope	Observer	Prop. #	Instrument	Detector	Seeing
4 Meter	LO: Landriau; SOs: Cho (1st half, remote), Morales-Navarrete (2nd half, remote)	---	DESI	N/A	N/A
WIYN	Higeura	2026A-300001	NEID	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
	0	Scientific Research		7.25	Weather	20:30 - 04:30
WIYN
	0	Scientific Research		7.25	Weather	20:30 - 04:30
2Meter
	7.25	Shutdown		0	Weather
Feed
	0	Scientific Research		0	Weather
W0_9m
	7.25	Shutdown		0	Weather

Observing Status

4 Meter	DESI Survey Observing. Entire night lost to weather.
WIYN	NEID Queue Observing. Entire night lost to weather.
2.1 Meter	Not Scheduled
Feed	Not Scheduled
0.9 Meter	Not Scheduled

Comments	A rainy night

Reported by:	Ava Doty

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