Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, October 17, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
CU01  A.Stephens        P.Wachiraphan         
UV01  S.R.Majewski      D.G.Whelan,S.R.Majewski

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU01  KOSMOS         18:36   01:08   
UV01  KOSMOS         01:08   01:35
UV01  KOSMOS         04:37   06:25

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU01/R      18:36  01:10    0    0    0    0   1.5  5.0   0    0
UV01/R      01:10  07:01  3.0    0    0    0   2.8  0.0   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: H.Abbot

Kosmos images stuck not writing out on afternoon checkout. Restarted kosmos-icc and restarted nubs to get it back and responsive, and reset servo deadband afterwards. 

Rain sensor alarmed multiple times when we were open with clear skies above and <30% humidity. Checked to make sure and no obvious moisture anywhere outside or in the (dark) dome and all seemed fine. 

Mostly clear A-half with scattered clouds. Rain bearing clouds started coming in early into B-half, so closed for that. High humidity followed, but then eventually subsided letting us open again around 0430 until the end of the night. Telescope and instruments well behaved throughout the 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
--------------------------------------------------------------------------
 19:10 kosmos   575( 1146) 182  36   8.1  9.6  9.1  9.3  8.3   --  1.52
 01:20 kosmos   350(  764)  86  68   6.9  6.8  7.4  6.8  6.7   --  1.29


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    49    28      5   231   (SW)    444    clear     none 
     17:00    49    20      6   155  (SSE)    362 mstly clr    none 
     18:00    48    19     11   127   (SE)    287 mstly clr    none 
     19:00    47     2     20   127   (SE)    101 mstly clr    none 
     20:00    47    -4     21   143   (SE)     71 mstly clr    none 
     21:00    46    -5     21   135   (SE)     66 mstly clr    none 
     22:00    46    -5     21   138   (SE)     53  ptly cldy   none 
     23:00    45    -6     22   141   (SE)     51 mstly cldy   none 
     00:00    45    -6     21   150  (SSE)     74  ptly cldy   none 
     01:00    45     7     18   159  (SSE)     66  ptly cldy   none 
     02:00    45     9     13   162  (SSE)     49  ptly cldy   none 
     03:00    45    33     14   176    (S)     72  ptly cldy   none 
     04:00    43    39     12   178    (S)           clear    humid 
     05:00    43    38     13   182    (S)           clear     none 
     06:00    44    38     13   181    (S)           clear     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: 3.2.2