Temperature Information from the Mayall 4m at the Kitt Peak National Observatory
Data recorded at: (2026-05-11 14:05:01)

(Updates every ten minutes)
South Truss Steel Mirror Cover Hinge South - Air Mirror Cover Hinge West - Air Chimney South Outside Top - Air Chimney West Outside Top - Air Chimney South Inside Bottom - Air Chimney South Inside Middle - Air Chimney South Inside Top - Air Dec Bore Steel Truss South Bottom - Air Truss South Middle - Air Truss South Top - Air Truss Steel North Top Truss Steel East Top Truss Steel West Top Truss Steel South Top Truss Steel North Bottom Truss Steel East Bottom Truss Steel West Bottom Truss Steel South Bottom Top Ring Steel South Top Ring Steel West Centre Section Inside Centre Section Outside Primary Cell Inside Primary Cell Outside Cass Cage Ceiling Inside Cass Cage Ceiling Outside
Current Local time: 2026-05-11 14:09:36
Blue = Mirror Red = Air Green = Steel
19.2 17.9 22.3 24.1 24.3 11.5
18.1 17.8 0.0 23.1 24.3 -6.1
18.0 17.9 0.0 23.2 18.8 2.5
17.9 18.0 0.0 23.2 23.0 17.3
18.2 18.0 0.0 25.0 18.8 24.5
18.1 17.9 18.0 22.4 18.9 17.1
18.0 17.9 18.5 11.1 6.6 18.0
18.0 10.8 25.5 22.6 22.2 4.0
17.9 23.6 25.4 23.0 23.8 26.6
From (YYYY-MM-DD HH:MM:SS) To (YYYY-MM-DD HH:MM:SS)
The numbers above (right) show the temperatures (in degrees C) and humidity (%) from sensors placed all around the 4-Meter Telescope. This data was taken at the time shown in bold at the top of the page.
Click on the image or an individual number for the last 12 hours worth of data from that sensor.
Or, define a date and time range (MST), and select multiple checkboxes for multiple sensor plots. Note, that selecting too many senors and/or too large of range can make it hard to get meaningful information.
Assume HUMIDITY is plotted in %Relative Humidity, even though Y-Axis lable may indicate "Deg. C".
A temperature of 99.9 indicates the sensor is not functioning properly.


Last Updated: May 18, 2009