Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, January 08, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
NM05  A.Peck            E.Nielsen, A.Smith    
UW01  S.Hawley          L.Hebb                
UW02  P.Yoachim         P.Yoachim             
AP01  S.Merkowitz       R.McMillan            

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM05  ECHELLE        --:--   --:--   
UW01  ARCTIC         --:--   --:--
UW02  KOSMOS         --:--   --:--
AP01  APOLLO         --:--   --:--

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM05/R      17:23  23:50  5.6  0.8   0    0   0.0  0.0   0    0
UW01/R      23:50  04:00   0   4.3   0    0   0.0  0.0   0    0
UW02/R      04:00  05:58   0   2.0   0    0   0.0  0.0   0    0
AP01/E      05:58  06:58   0   1.0   0    0    0    0    0    0       

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky

The 3.5m enclosure roof was completely covered with ice at sunset tonight.  The lightning arrestors also had a good coating of ice as well as our roof cams (which meant I had to physically climb the latter to access the roof hatch to do a visual.  I called the night due to weather at sunset.

Light snow around midnight and by 3AM we had about two inches of fresh powder.  

I was going to park the enclosure facing South but it look like they are staged to bring up LN2 to the observing level this morning.  

I did morning fills for all instruments.

                    ------- 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    28    28     23   238  (WSW)          cloudy    humid 
     17:00    27    27     26   232   (SW)          cloudy    humid 
     18:00    26    26     23   243  (WSW)          cloudy    humid 
     19:00    26    26     22   249  (WSW)          cloudy    humid 
     20:00    27    26     25   234   (SW)          cloudy    humid 
     21:00    26    26     29   239  (WSW)          cloudy    humid 
     22:00    26    25     27   259    (W)          cloudy    humid 
     23:00    25    25     18   237  (WSW)          cloudy   lt snow
     00:00    26    26     25   255  (WSW)          cloudy   lt snow
     01:00    23    23     19   266    (W)          cloudy   lt snow
     02:00    22    20     16   250  (WSW)          cloudy   lt snow
     03:00    21    20     16   224   (SW)          cloudy   lt snow
     04:00    18    16     16   241  (WSW)          cloudy   lt 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