LTO Report
Kitt Peak Nightly LTO Report For UT: 2026-04-19
Report Time (MST): 05:17
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) | 14.1 | 16.3 | 12.7 | 0.5 |
|---|
| Dewpoint Temperature (°C) | -7.7 | -5.5 | -11.7 | 1.3 |
|---|
| Relative humidity (%) | 22 | 25 | 16 | 1.8 |
|---|
| Wind Speed (mph) | 16.7 | 30.8 | 9.9 | 3.3 |
|---|
| Wind Direction (°) | 17 | 334 | 298 | 0.7 |
|---|
| 4M Dome Temperature (°C) | 14.5 | 18.2 | 12.8 | 1.0 |
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| 4M Dome Dewpoint (°C) | -5.2 | -2.9 | -8.7 | 1.0 |
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| 4M Primary Mirror (°C) | 13.2 | 13.8 | 12.0 | 0.5 |
|---|
| Weather Comments: | High, thin, sparse clouds throughout the night. Wind ranged from 9.9mph-29mph, with a median in the low 20s. Wind mostly came from E. Humidity ranged from 16%-25%, with a median around 20%. |
|---|
| Recognized Hours: | ( 8.5 ) 18 degree twilight + 0.5 hr. |
Observer Information
| Telescope | Observer | Prop. # | Instrument | Detector | Seeing |
|---|
| 4 Meter | LO: Landriau; SOs: Yu (1st half, remote), Zhang (2nd half, remote) | --- | DESI | N/A | 1.3 |
|---|
| WIYN | Baker, Barber, Salzer (all remote) | 2026A-904025 | HYDRA | STA1 | 1.2 |
|---|
| 2.1 Meter | No Observer | --- | --- | N/A | N/A |
|---|
| Feed | No Observer | --- | N/A | N/A | N/A |
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| 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 |
|---|
| 8.42 | Scientific Research | | 0.08 | Misc. Problems | 21:30 - 22:00 |
|
| WIYN |
|---|
| 3.70 | Scientific Research | | 0.20 | Weather | 03:00 - 03:30 |
| | | | 4.60 | Instrument Problem | 20:30 - 01:30 |
|
| 2Meter |
|---|
| 8.5 | Shutdown | | 0 | Weather | |
|
| Feed |
|---|
| 0 | Scientific Research | | 0 | Weather | |
|
| W0_9m |
|---|
| 8.5 | Shutdown | | 0 | Weather | |
Observing Status
| 4 Meter | DESI Survey Observing. Lost 5 minutes for VC caravan departure. Seeing ranged from 0.9"-2", with a median of 1.3". |
|---|
| WIYN | Hydra observing. Starting at 20:39, lost 4.6 hours to Hydra guider issues - see WIYN night log for details. Lost 12 minutes to annoying clouds at 3:28. Seeing ranged from 1"-1.5", with a median of 1.2". |
|---|
| 2.1 Meter | Not Scheduled |
|---|
| Feed | Not Scheduled |
|---|
| 0.9 Meter | Not Scheduled |
|---|
| Comments | Sparse clouds caused some trouble, but overall the conditions were good. |
|---|
Weather Plots
