Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, February 07, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
OU04  M.Kilic           G.Jewett              
OU01  G.Jewett          G.Jewett              

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU04  ARCTIC         22:40   00:10   
OU01  ARCTIC         00:10   06:26

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU04/R     17:50  00:10   4.8   0    0    0   1.1  0.5   0    0
OU01/R     00:10  06:44    0    0    0    0   0.0  6.6   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky

I delayed opening due to clouds and humidity.  Things finally improved enough that I opened at 22:40.

No 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
--------------------------------------------------------------------------
 22:54 arctic   234(  528) 120  58   2.7  1.9  3.9  2.6  2.2   BG40  1.41
 22:55 NA2gdr 35985(35985) 120  58   2.9  1.9  3.8  2.5  2.2   Clear  1.44
 00:58 arctic   440(  704)  -2  39   1.7  1.0  2.3  1.4  1.5   BG40  1.07
 01:00 NA2gdr 36239(36239)  -3  39   1.7  1.0  2.3  1.4  1.5   Clear  1.15

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    39    33     21   193  (SSW)          cloudy     none 
     17:00    37    33     17   185    (S)          cloudy     none 
     18:00    37    33     23   199  (SSW)          cloudy     none 
     19:00    36    32     12   200  (SSW)          cloudy    humid 
     20:00    36    32     12   218   (SW)          cloudy    humid 
     21:00    36    32      5   194  (SSW)        mstly cldy  humid 
     22:00    36    29      8   274    (W)         ptly cldy   none 
     23:00    36    25     15   301  (WNW)         ptly cldy   none 
     00:00    35    25      8   298  (WNW)   1010 mstly clr    none 
     01:00    35    25     11   299  (WNW)    960 mstly clr    none 
     02:00    34    25     14   319   (NW)        mstly clr    none 
     03:00    34    25      8   352    (N)           clear     none 
     04:00    35    25      7   348  (NNW)   1164    clear     none 
     05:00    35    25     10   352    (N)           clear     none 
     06:00    35    25     10   350    (N)           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