Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, December 28, 2025

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW04  S.Hawley          S.Hawley              
CU05  A.Kowalski        J.Libby-Roberts       

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW04  ECHELLE        17:31   20:56   
CU05  ARCTIC         --:--   --:--

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW04/R      17:14  00:10    0   3.2   0    0   0.0  3.7   0    0
CU05/R      00:10  06:56   5.1  1.7   0    0   0.0  0.0   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend

We were able to get on sky for a few hours tonight before the clouds rolled in, and by 21:00 we weren't getting anything so we closed up. The clouds stuck around for the rest of the night. It started snowing at 03:30, and has not stopped yet! 

                    ------- 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
--------------------------------------------------------------------------
 17:41 ecamera    478( -214) -42  44   2.7  4.1  4.2  3.8  3.1   Clear  1.62

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    38    13      4   266    (W)    234 mstly clr    none 
     17:00    37    12      1   210  (SSW)    239 mstly clr    none 
     18:00    36    22     15   115  (ESE)    369 mstly clr    none 
     19:00    35    19     14   111  (ESE)    462 mstly clr    none 
     20:00    34    18     16   115  (ESE)    476 mstly cldy   none 
     21:00    37     4     18   141   (SE)    384   cloudy     none 
     22:00    38    -7     12   178    (S)    695   cloudy     none 
     23:00    37   -12     13   180    (S)    760   cloudy     none 
     00:00    37    -1     16   179    (S)    472   cloudy     none 
     01:00    34     6      7   181    (S)    406   cloudy     none 
     02:00    33     8      1   287  (WNW)    407   cloudy     none 
     03:00    35     7      5   191    (S)    423   cloudy     snow 
     04:00    30    22      4   101    (E)    516   cloudy     snow 
     05:00    30    28      5    67  (ENE)          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