Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, August 09, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
WY01  M.Moe             S.Dandu,M.Moe         
NM05  T.McQuaid         T.McQuaid             

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY01  KOSMOS         20:03   00:58   
NM05  ARCTIC         01:10   02:45
NM05  ARCTIC         03:30   05:30

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY01/R      20:03  01:10    0    0    0    0   5.1  0.0   0    0
NM05/R      01:10  06:15  0.8    0    0    0   1.7  2.6   0    0

note: scheduled times listed include instrument change time

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

Mostly clear night with the occasional thin cloud coming overhead.

Dust had a sudden rise (~4300cts) at 0240, so went up to close, but dust counts went back to normal (~2200cts) by the time I got back. Stayed closed for a while to make sure it stabilised. Enclosure dust counter never went about 1000cts, so I believe the mirror wasn't affected. Opened again at 0330.

                    ------- 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
--------------------------------------------------------------------------
 20:34 kosmos   400( 1500) -48  52  18.9 21.2 21.0 20.4 19.4   --  1.24
 22:34 kosmos   300( 1217) -177  59  16.4 17.3 18.1 17.3 16.4   --  1.26
 01:18 arctic   440( 1253)  53  60  15.4 15.2 15.8 14.9 15.4   R  1.18


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    75    45     12   231   (SW)   1719  ptly cldy   none 
     17:00    74    41     11   257  (WSW)   1740 mstly clr    none 
     18:00    75    38      9   219   (SW)   1640 mstly clr    none 
     19:00    71    35      1   207  (SSW)   1351 mstly clr    none 
     20:00    68    25      7    93    (E)    994 mstly clr    none 
     21:00    65    27     13   123  (ESE)   1062  ptly cldy   none 
     22:00    63    37     21   126   (SE)   1599 mstly clr    none 
     23:00    61    40     11    97    (E)   1848    clear     none 
     00:00    60    41     13   113  (ESE)   2139    clear     none 
     01:00    59    42      8   112  (ESE)   2172 mstly clr    none 
     02:00    62    39      5    96    (E)   1947    clear     none 
     03:00    63    36      6   248  (WSW)   1618    clear     dust 
     04:00    61    36      5   212  (SSW)   1576    clear     none 
     05:00    62    34      4   194  (SSW)   1546    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: 3.2.2