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Kitt Peak Nightly LTO Report For UT: 2020-01-22

Report Time (MST): 04:26                    For access to all LTO-Reports go to: http://www-kpno.kpno.noao.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)	3.4	4.5	2.2	0.6
Dewpoint Temperature (°C)	1.5	2.4	0.5	0.3
Relative humidity (%)	87	91	80	1.8
Wind Speed (mph)	25.0	44.2	5.6	6.5
Wind Direction (°)	243	239	152	1.2
4M Dome Temperature (°C)	7.9	8.6	7.4	0.3
4M Dome Dewpoint (°C)	4.7	6.6	2.4	0.6
4M Primary Mirror (°C)	9.2	9.4	8.9	0.1

Weather Comments:	Fog all night, with 100% humidity and mild-strong winds out of the SW.
Recognized Hours:	( 11.25 )      18 degree twilight + 0.5 hr.

Observer Information

Telescope	Observer	Prop. #	Instrument	Detector	Seeing
4 Meter	Elliot, Weaver, Flanning, Fagioli, Honscheid, Kent	---	DESI	N/A	N/A
WIYN	Deliyannis, Sun -remote-	2019B-0498	HYDRA	STA1	N/A
2.1 Meter	No Observer	---	N/A	N/A	N/A
Feed	No Observer	---	N/A	N/A	N/A
0.9 Meter	Ward-Duong,Betti, Goldman, Hill,Henry,Rhatt	2019B-0929	HDI	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
	8.0	T and E		3.25	Weather	19:00 - 06:00
WIYN
	0.0	Scientific Research		11.25	Weather	19:00 - 06:00
2Meter
	0.0	Scientific Research
Feed
	0.0	Scientific Research
W0_9m
	0.0	Scientific Research		11.25	Weather	19:00 - 06:00

Observing Status

4 Meter	DESI commissioning. Closed all night due to bad weather but managed to get some closed-dome testing.
WIYN	Closed all night due to bad weather.
2.1 Meter	Not Scheduled
Feed	Not Scheduled
0.9 Meter	Closed all night due to bad weather.

Comments	A long, wet and foggy night.

Reported by:	Christian Soto

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