Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, December 18, 2025

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
WY02  M.Moe             C.Smith               
CU03  Z.Berta-Thompson  Z.Berta-Thompson      

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY02  ECHELLE        17:55   23:47   
CU03  KOSMOS         00:00   06:12

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY02/R      17:09  00:10    0    0    0    0   7.0  0.0   0    0
CU03/R      00:10  06:52    0    0    0    0   6.7  0.0   0    0

note: scheduled times listed include instrument change time

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

We had thin clouds most of the night and some thicker orographic clouds to the east at the end of the night, but otherwise the weather was quite nice and even the clouds didn't affect observing much. 

Stripchart mac started lagging in the middle of the night (100% on both CPUs) which seems to be related to the strip graphs (not the dataq this time!). I tried killing programs but the computer was still struggling so I restarted it. 

                    ------- 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
--------------------------------------------------------------------------
 17:58 ecamera    460(  -60) -10  53   6.9  8.0  8.1  7.6  6.9   Clear  1.00
 00:03 kosmos   490(  829) -48  59   5.9  5.1  5.8  5.2  5.7   --  0.85


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    48     5      8   286  (WNW)   1135  ptly cldy   none 
     17:00    45     5      8    56   (NE)   1072  ptly cldy   none 
     18:00    45     5     10    24  (NNE)   1038  ptly cldy   none 
     19:00    45     8     12   315   (NW)    920 mstly clr    none 
     20:00    45    12     12   315   (NW)   1020 mstly clr    none 
     21:00    42    16     11   306   (NW)    863  ptly cldy   none 
     22:00    42    17      8   272    (W)    947  ptly cldy   none 
     23:00    42    17      9   262    (W)    972  ptly cldy   none 
     00:00    43    17      6   256  (WSW)    958 mstly clr    none 
     01:00    43    17      9   275    (W)    640 mstly clr    none 
     02:00    44    18     11   286  (WNW)    637 mstly clr    none 
     03:00    44    16     13   304   (NW)    568 mstly clr    none 
     04:00    44    18      8   335  (NNW)    273  ptly cldy   none 
     05:00    44    21      9   330  (NNW)    132  ptly cldy   none 
     06:00    45    22     10   321   (NW)    134  ptly cldy   none 



     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