Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, September 12, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
NM05  T.McQuaid         T.McQuaid             
BY01  B.Boizelle        B.Boizelle            

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM05  ECHELLE        19:30   01:09   
BY01  KOSMOS         01:13   06:02

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM05/R      19:22  01:10    0   0.1    0    0   5.1  0.6  0    0
BY01/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.Sutherland

Had to restart strip charts at sunset since all 4 charts were blank.

Nice night with great weather, no telescope or instrument problems tonight. 


                    ------- 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
--------------------------------------------------------------------------
 19:38 ecamera    618(  786) 176  64  19.5 22.7 21.9 23.7 20.1   ND1  0.90
 21:15 ecamera    302(  351) 201  60  19.9 20.1 19.9 19.5 19.0   clear  0.90
 01:31 klow   352( 1252)  91  69  17.1 17.1 17.8 17.0 16.7   --  0.85




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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    71    41      3   306   (NW)    228  ptly cldy   none 
     17:00    74    43      8   288  (WNW)    203 mstly clr    none 
     18:00    73    42     12   261    (W)    224 mstly clr    none 
     19:00    69    41      4   257  (WSW)    207    clear     none 
     20:00    68    41      5   261    (W)    197    clear     none 
     21:00    68    41      5   246  (WSW)    276    clear     none 
     22:00    67    41      6   228   (SW)    279    clear     none 
     23:00    66    42      6   236   (SW)    357    clear     none 
     00:00    64    44      8   316   (NW)    389    clear     none 
     01:00    64    44      5   345  (NNW)    370 mstly clr    none 
     02:00    63    44      5    10    (N)    372    clear     none 
     03:00    64    43      2   326   (NW)    324    clear     none 
     04:00    65    42      1   227   (SW)    305    clear     none 
     05:00    66    42      4   234   (SW)    290    clear     none 
     06:00    65    43      2   207  (SSW)    342    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