Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, January 24, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
WY01  M.Brotherton      M.Brotherton          
WY02  M.Moe             M.Moe                 
WY02  M.Moe             M.Moe                 
UW02  P.Yoachim         D.Meng                

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY01  KOSMOS         --:--   --:--   
WY02  ECHELLE        --:--   --:--
WY02  ECHELLE        --:--   --:--
UW02  KOSMOS         --:--   --:--

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY01/R      17:37  20:17    0    2.7    0    0   0.0  0   0    0
WY02/R      20:17  00:10    0.5   3.4    0    0   0  0  0    0
WY02/R      00:10  04:10    4    0    0    0   0  0.0   0    0
UW02/R      04:10  06:54    2.7    0    0    0   0  0.0   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland

Snow storm kept us closed all night.

At some point during the day, the dome crashed while running the snow program, but I just released the automatic stop button on the intermediate level and it was fine. 

Turned roof heaters off at 21:50 due to the temperature being nearly -4C.

We got about 18" of snow as of writing this night log, and it is still coming down. Snow program was run all night.


                    ------- FAILURE LOG -------

              FAILURE MODE     TIME
PROG   INSTR     TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------


            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------


               ------------- WEATHER LOG ----------------

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    29    29     13   233   (SW)          cloudy     snow 
     17:00    30    31     11   270    (W)          cloudy     snow 
     18:00    30    30      8   265    (W)          cloudy     snow 
     19:00    29    31      7   208  (SSW)          cloudy     snow 
     20:00    27    28     14   221   (SW)          cloudy     snow 
     21:00    26    24     13   209  (SSW)          cloudy     snow 
     22:00    27    25     13   262    (W)          cloudy     snow 
     23:00    28    28     19   240  (WSW)          cloudy     snow 
     00:00    27    27     18   247  (WSW)          cloudy     snow 
     01:00    27    27     14   250  (WSW)          cloudy     snow 
     02:00    25    25     11   230   (SW)          cloudy     snow 
     03:00    25    25      9   232   (SW)          cloudy     snow 
     04:00    24    23      8   261    (W)          cloudy     snow 
     05:00    23    21     13   209  (SSW)          cloudy     snow 
     06:00    22    22      8   265    (W)          cloudy     snow 


     Note: the wind was coming from the azimuth listed.
     The convention used is north=0 degrees, east=90 degrees.
     The dust count is particles > 1u per 0.1 cubic feet.

              ----------  TELESCOPE SOFTWARE  ----------

Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 3.1.8