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Kitt Peak Nightly LTO Report For UT: 2025-04-24

Report Time (MST): 05:01                    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)	11.5	15.0	9.8	0.7
Dewpoint Temperature (°C)	-11.8	-5.0	-23.3	4.3
Relative humidity (%)	20	30	7	5.8
Wind Speed (mph)	27.0	41.4	8.4	6.6
Wind Direction (°)	166	306	31	0.3
4M Dome Temperature (°C)	11.9	16.0	10.6	0.7
4M Dome Dewpoint (°C)	-8.2	-3.6	-16.0	2.3
4M Primary Mirror (°C)	10.5	11.7	9.5	0.6

Weather Comments:	Clear skies and 20% humidity all night. 15mph winds out of the south until 2100 when it jumped to 40mph. Winds fell back to 30mph around 0300.
Recognized Hours:	( 8.25 )      18 degree twilight + 0.5 hr.

Observer Information

Telescope	Observer	Prop. #	Instrument	Detector	Seeing
4 Meter	LO: Tyas (on site); SOs: Crespi (on site)	---	DESI	N/A	1.0
WIYN	Patel	2025A-300001	NEID	N/A	0.85
2.1 Meter	No Observer	---	N/A	N/A	N/A
Feed	No Observer	---	N/A	N/A	N/A
0.9 Meter	No 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)
4Meter
	3.34	Scientific Research		4.91	Weather	21:30 - 03:00
WIYN
	3.25	Scientific Research		5	Weather	21:30 - 03:00
2Meter
	8.25	Shutdown		0	Weather
Feed
	0	Scientific Research		0	Weather
W0_9m
	8.25	Shutdown		0	Weather

Observing Status

4 Meter	DESI Survey Observing. Lost almost 5 hours to high dust levels. Seeing measured between 0.8 arcseconds and 1.5 arcseconds.
WIYN	NEID Queue. Lost almost 5 hours to high dust levels. Seeing measured between 0.6 arcseconds and 1.7 arcseconds.
2.1 Meter	Not Scheduled
Feed	Not Scheduled
0.9 Meter	Not Scheduled

Comments	A dusty and windy night.

Reported by:	Anthony Paat

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