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Kitt Peak Nightly LTO Report For UT: 2017-08-18

Report Time (MST): 04:15                    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)	20.6	22.6	19.7	0.4
Dewpoint Temperature (°C)	-2.4	0.7	-6.9	1.2
Relative humidity (%)	21	24	16	1.6
Wind Speed (mph)	13.4	25.3	4.6	4.5
Wind Direction (°)	206	357	242	1.0
4M Dome Temperature (°C)	20.4	22.0	19.7	0.3
4M Dome Dewpoint (°C)	-1.6	1.9	-5.1	1.1
4M Primary Mirror (°C)	19.2	19.6	18.2	0.3

Weather Comments:	Mostly clear with some thin cirrus drifting through. A 10 to 15 mph wind out of the SW. Low humidity
Recognized Hours:	( 8.5 )      18 degree twilight + 0.5 hr.

Observer Information

Telescope	Observer	Prop. #	Instrument	Detector	Seeing
4 Meter	Harmer - remote	2017B-0137	KOSMOS	E2V	1.6
WIYN	van Zee (remote), Payne (remote)	2017B-0818	SPARSEPAK	STA1	1.1
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
	8.5	Scientific Research
WIYN
	8.5	Scientific Research
2Meter
	8.5	Maintenance
Feed
	0.0	Scientific Research
W0_9m
	8.5	Maintenance

Observing Status

4 Meter	No problems. Seeing ranged from 1.2 to 2.3
WIYN	No problems. Seeing ranged from 1 to 1.2
2.1 Meter	Not Scheduled
Feed	Not Scheduled
0.9 Meter	Not Scheduled

Comments	A trouble free night.

Reported by:	Karen Butler

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