Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, August 10, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
CU02  B.Fleming         C.E.Flores, B.Fleming 
WY02  C.Kobulnicky      C.Kobulnicky          

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU02  KOSMOS         20:59   01:07   
WY02  KOSMOS         01:08   04:49

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU02/R      20:02  01:10  0.9    0    0    0   4.2  0.0   0    0
WY02/R      01:10  06:16    0  1.3    0    0   3.8  0.0   0    0

note: scheduled times listed include instrument change time

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

Thick cloud to start the night that slowly faded away over the first 3 hrs. Battled some cloud for a lot of A-half. B-half mostly clear but with some light cloud rolling in by the end which forced us to stop observing science targets (which were dim and low).

Motion error at 53deg slewing down. Reinitialising axes fixed it and it didn't pop up again. Otherwise instruments were well behaved.

                    ------- 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
--------------------------------------------------------------------------
 20:57 klow   465( 1565) 157  70  19.8 21.4 21.0 21.3 19.9   --  1.75
 01:17 kosmos   340( 1213) 256  71  16.9 16.6 17.2 16.4 16.6   --  1.28

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    71    45      7   183    (S)   1636  ptly cldy   rain 
     17:00    76    46      2   179    (S)   1632  ptly cldy   none 
     18:00    73    44     11   239  (WSW)   1672  ptly cldy   none 
     19:00    72    43     10   216   (SW)   1964 mstly cldy   none 
     20:00    68    43      2   174    (S)   1671 mstly cldy   none 
     21:00    67    39     11   155  (SSE)   1819  ptly cldy   none 
     22:00    64    39     12   113  (ESE)   2115 mstly clr    none 
     23:00    63    39     14   113  (ESE)   2441 mstly clr    none 
     00:00    64    39     17   136   (SE)   2428    clear     none 
     01:00    63    43     20   142   (SE)   2481    clear     none 
     02:00    63    44     18   145   (SE)   2535    clear     none 
     03:00    62    43     16   157  (SSE)   2235    clear     none 
     04:00    62    43     15   188    (S)   2290 mstly clr    none 
     05:00    61    43     12   187    (S)   2580  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: 3.2.2