Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, October 07, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
OU04  M.Barrientos      G.Jewett              
NM03  M.Prescott        K.Sanderson           

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU04  ARCTIC         21:15   00:40   
NM03  KOSMOS         01:45   06:02

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU04/R      18:48  01:10   3.0   0    0    0   3.4  0.0   0    0
NM03/R      01:10  06:54   0.6   0    0    0   3.2  1.9   0    0

note: scheduled times listed include instrument change time

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

Echelle's ThAr lamp was dim at checkout, dropping power supply fixed it.

Stayed closed at the start of the night due to some cloud cover and precipitation radar in the vicinity. Once it cleared up we opened at 21:15. Stayed mostly clear until a little after midnight when some thicker clouds started rolling in, and I closed at 00:40. A half logged off after that so I swapped to kosmos at 00:40. It cleared up and we reopened at 01:45, wrapped up at 6:02.

Arctic's LL quad stayed saturated through all of A half. 



                    ------- 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
--------------------------------------------------------------------------
 21:23 arctic   675( 1417)  73  62  10.9 13.6 14.2 13.1 11.4   BG40  1.25
 02:05 kosmos   315(  889) -98  68  10.7 10.2 10.9  9.9 10.2   --  1.00

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    58    46      7   228   (SW)    216    clear     none 
     17:00    56    44      6   245  (WSW)    205    clear     none 
     18:00    57    46      1   203  (SSW)    208 mstly cldy   none 
     19:00    54    45      4   181    (S)        mstly cldy   none 
     20:00    53    45      1   197  (SSW)         ptly cldy   none 
     21:00    53    44      7   125   (SE)        mstly clr    none 
     22:00    52    44      2   110  (ESE)        mstly clr    none 
     23:00    52    44      1   214   (SW)        mstly clr    none 
     00:00    53    43      1   192  (SSW)         ptly cldy   none 
     01:00    50    43      7    87    (E)         ptly cldy   none 
     02:00    52    42      1   342  (NNW)        mstly clr    none 
     03:00    52    42      4   332  (NNW)    196  ptly cldy   none 
     04:00    52    43      3   308   (NW)        mstly clr    none 
     05:00    51    43      4   272    (W)        mstly clr    none 
     06:00    51    43      1   258  (WSW)        mstly clr    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
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