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Kitt Peak Nightly LTO Report For UT: 2025-11-16

Report Time (MST): 03:47                    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)	10.4	11.3	9.5	0.4
Dewpoint Temperature (°C)	6.5	7.8	5.4	0.4
Relative humidity (%)	77	87	73	1.9
Wind Speed (mph)	25.9	40.7	10.0	5.2
Wind Direction (°)	126	137	59	1.1
4M Dome Temperature (°C)	12.4	13.2	11.7	0.4
4M Dome Dewpoint (°C)	6.2	6.9	5.5	0.3
4M Primary Mirror (°C)	11.4	11.9	10.8	0.2

Weather Comments:	Threatening clouds and occasional rain throughout the night. Winds were about 10mph - 50mph. Humidity was about 75% - 90%.
Recognized Hours:	( 11.25 )      18 degree twilight + 0.5 hr.

Observer Information

Telescope	Observer	Prop. #	Instrument	Detector	Seeing
4 Meter	LO: Schubnell (on site); SO: Bermejo (on site)	---	DESI	N/A	N/A
WIYN	Baker	2025B-300001	HYDRA	STA1	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		11.25	Weather	18:30 - 05:30
WIYN
	0	Scientific Research		11.25	Weather	18:30 - 05:30
2Meter
	11.25	Shutdown		0	Weather
Feed
	0	Scientific Research		0	Weather
W0_9m
	11.25	Shutdown		0	Weather

Observing Status

4 Meter	Full night of DESI survey observing. Lost full night to weather. No seeing measurements.
WIYN	Full night of Hydra observing. Lost full night to weather. No seeing measurements.
2.1 Meter	Not Scheduled
Feed	Not Scheduled
0.9 Meter	Not Scheduled

Comments	A cloudy and damp night.

Reported by:	Thaxton Mountain

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