LTO Report
Kitt Peak Nightly LTO Report For UT: 2025-09-15
Report Time (MST): 05:08
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) | 18.7 | 20.7 | 17.8 | 0.4 |
|---|
| Dewpoint Temperature (°C) | 3.2 | 10.1 | -4.1 | 3.7 |
|---|
| Relative humidity (%) | 37 | 53 | 22 | 9.0 |
|---|
| Wind Speed (mph) | 12.0 | 18.5 | 7.0 | 2.2 |
|---|
| Wind Direction (°) | 301 | 219 | 151 | 0.7 |
|---|
| 4M Dome Temperature (°C) | 18.5 | 21.8 | 17.5 | 0.7 |
|---|
| 4M Dome Dewpoint (°C) | 9.9 | 13.9 | 4.8 | 1.6 |
|---|
| 4M Primary Mirror (°C) | 18.1 | 18.7 | 16.4 | 0.4 |
|---|
| Weather Comments: | Clear skies most of the night, with a patch of altocumulus passing through about
0200. Winds were about 10mph - 20mph. Humidity was about 20% - 50%. |
|---|
| Recognized Hours: | ( 9.5 ) 18 degree twilight + 0.5 hr. |
Observer Information
| Telescope | Observer | Prop. # | Instrument | Detector | Seeing |
|---|
| 4 Meter | LO: Schubnell; SO: Chellino (on site) | --- | DESI | N/A | 0.9 |
|---|
| WIYN | No Observer | 2025B-300001 | N/A | N/A | 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 |
|---|
| 9.40 | Scientific Research | | 0.10 | Misc. Problems | 21:30 - 22:00 |
|
| WIYN |
|---|
| | | | 9.50 | Tele-Mechanical Problem | 19:30 - 05:00 |
|
| 2Meter |
|---|
| 9.5 | Shutdown | | 0 | Weather | |
|
| Feed |
|---|
| 0 | Scientific Research | | 0 | Weather | |
|
| W0_9m |
|---|
| 9.5 | Shutdown | | 0 | Weather | |
Observing Status
| 4 Meter | Full night of DESI survey observing. Lost about 6 min to the VC caravan departure. No technical problems. Seeing ranged 0.8" - 1.3", median of about 0.9". |
|---|
| WIYN | Originally scheduled as full night of NEID Q observing. Lost full night to malfunction of telescope mirror covers. No seeing measurements. |
|---|
| 2.1 Meter | Not Scheduled |
|---|
| Feed | Not Scheduled |
|---|
| 0.9 Meter | Not Scheduled |
|---|
| Reported by: | Thaxton Smith |
|---|
Weather Plots
