Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, May 11, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
CU04  A.F               A.Kowalski            
WY01  M.Brotherton      K.Zhang               
AP02  S.Merkowitz       R.McMillan,T.Sutherland

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU04  KOSMOS         20:26   00:40   
WY01  KOSMOS         --      --
AP02  APOLLO         --      --

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU04/R      20:01  01:10   0.5   0    0    0   4.7  0.0   0    0
WY01/R      01:10  02:50   1.7   0    0    0   0.0  0.0   0    0
AP02/R      02:50  05:58   0.4  2.8   0    0   0.0  0.0   0    0

note: scheduled times listed include instrument change time

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

Opened at 20:26 after finishing cals

closed at 00:40 due to appreciable pollen build up

gave up at 05:15 as the situation didn't improve

                    ------- 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
--------------------------------------------------------------------------
 20:47 klow   692( 1566)  62  63  13.4 16.5 15.9 16.1 14.3   --  1.90

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    60    35     10   265    (W)   1788    clear     none 
     17:00    62    26     13   256  (WSW)   1807    clear     none 
     18:00    62    21      6   261    (W)   1915    clear     none 
     19:00    62    25      3   218   (SW)   1921    clear     none 
     20:00    56    27      5   228   (SW)   1990    clear     none 
     21:00    57    22      2   206  (SSW)   2011    clear     none 
     22:00    55    14      7   190    (S)   2159    clear     none 
     23:00    55    31      7   217   (SW)   2195    clear     none 
     00:00    55    32      9   210  (SSW)   2233    clear     none 
     01:00    54    32      9   193  (SSW)   2436    clear     none 
     02:00    54    32      8   194  (SSW)   2159    clear     none 
     03:00    53    32      6   192  (SSW)   2241    clear     none 
     04:00    53    33      6   190    (S)   1952    clear     none 
     05:00    53    33      8   189    (S)   1635    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: 3.1.8