Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, August 12, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
JH03  C.Ingebretsen     C.Ingebretsen         
UW10  I.Chow            I.Chow,C.Chandler,J.Murtagh

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
JH03  KOSMOS         --:--   --:--   
UW10  ARCTIC         03:35   03:40

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
JH03/R      20:00  01:10  5.1  0.1    0    0   0.0  0.0   0    0
UW10/R      01:10  06:17  5.0    0    0    0   0.1  0.0   0    0

note: scheduled times listed include instrument change time

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

Nearby rain and heavy clouds kept us closed for entirety of A-half.

Found a big enough gap in the clouds to open for at 03:30, but of course a cloud formed right on top of us right after waking up the observer and focusing. Managed to get two 20s science frames out.

No telescope or instrument issues to report.

                    ------- 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
--------------------------------------------------------------------------
 03:45 arctic   415( 1242) 283  38  13.7 15.1 17.9 14.8 13.8   CU-VR  1.14

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    74    46     20   203  (SSW)   1445  ptly cldy   none 
     17:00    72    45     19   201  (SSW)   1536 mstly cldy   none 
     18:00    65    44     20   219   (SW)   1080   cloudy     none 
     19:00    65    47     14   197  (SSW)   1449   cloudy     none 
     20:00    63    47     14   205  (SSW)   1466   cloudy     none 
     21:00    62    47     14   203  (SSW)   1349   cloudy     none 
     22:00    62    47     18   222   (SW)   2027   cloudy     none 
     23:00    61    49      9   262    (W)   1228 mstly cldy   none 
     00:00    60    49      9   266    (W)   1206 mstly cldy   none 
     01:00    58    50     11   266    (W)        mstly cldy   none 
     02:00    58    50      8   264    (W)        mstly cldy   none 
     03:00    57    49     10   267    (W)         ptly cldy   none 
     04:00    57    50     10   244  (WSW)          cloudy     none 
     05:00    54    51     26   200  (SSW)          cloudy     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