Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, September 11, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW08  P.Szkody          P.Szkody              
UW05  C.Chandler        C.Chandler,I.Chow     

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW08  KOSMOS         19:23   01:02   
UW05  ARCTIC         01:14   06:00

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW08/R      19:23  01:10    0    0    0    0   5.6  0.2   0    0
UW05/R      01:10  06:37    0    0    0    0   5.4  0.0   0    0

note: scheduled times listed include instrument change time

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

Kosmos disperser wheel got stuck moving from red to blue at 19:00, manually moving the wheel and issuing kosmos status robotics fixed it

A bit of thin cloud cover at some points during the night, but mostly very clear.


                    ------- 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
--------------------------------------------------------------------------
 19:54 khigh   682( 1794) 260  60  19.8 21.6 21.2 21.2 19.8   --  1.06
 21:49 khigh   382( 1419) 143  68  20.3 20.0 20.3 19.6 20.2   --  1.02
 01:25 arctic   462( 1404) -29  36  17.7 17.5 18.1 17.2 17.4   SDSS_r  1.19

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    71    34      7     2    (N)    265    clear     none 
     17:00    71    34      6   357    (N)    344    clear     none 
     18:00    71    35      2   248  (WSW)    303    clear     none 
     19:00    68    35      2   260    (W)    313 mstly clr    none 
     20:00    67    34      3   346  (NNW)    342 mstly clr    none 
     21:00    69    32      2    14  (NNE)    413 mstly clr    none 
     22:00    68    32      3   347  (NNW)    268 mstly clr    none 
     23:00    68    32      6   262    (W)    368 mstly clr    none 
     00:00    65    38      6   343  (NNW)    358 mstly clr    none 
     01:00    64    40     11   346  (NNW)    563    clear     none 
     02:00    64    41     11     2    (N)    478    clear     none 
     03:00    64    41      8   335  (NNW)    404    clear     none 
     04:00    63    41      2   342  (NNW)    458    clear     none 
     05:00    66    41      9   360    (N)    454    clear     none 
     06:00    65    39     11     4    (N)    329    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: