Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, February 14, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW09  C.Chandler        C.Chandler,I.Chow,D.Singh,M.Frissell                                        
UW02  P.Yoachim         Z.Xu,Z.Liu            

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW09  ARCTIC         18:34   03:17                  
UW02  KOSMOS         03:35   06:01

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW09/R      17:57  00:10    0    0    0    0   6.2  0.0   0    0
UW09/R      00:10  03:24    0    0    0    0   3.2  0.0   0    0
UW02/R      03:24  06:38    0    0    0    0   2.4  0.9   0    0

note: scheduled times listed include instrument change time

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

Reset dome controller and mirror covers at start of night. 

Humid start to the night, but that eventually cleared and things were perfectly clear. A couple thin wispy clouds rolled in in the morning, but not enough to hinder science at all. 

                    ------- 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
--------------------------------------------------------------------------
 18:41 arctic   458(  773) -72  22   0.7  1.8  3.4  2.7  0.9   CUVR  1.78
 20:22 arctic   436(  665) -91  55   1.6  0.6  1.4  0.6  1.1   CUVR  0.96
 01:47 arctic   471(  683) -43  59   1.0  0.2  1.0  0.3  0.9   CUVR  0.90
 03:50 kosmos   561(  710) -61  41   3.8  0.9  2.0  1.1  2.9   --  1.21


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    34    29     12   308   (NW)         ptly cldy  humid 
     17:00    36    28      6   315   (NW)        mstly clr   humid 
     18:00    34    27      4   325   (NW)           clear    humid 
     19:00    33    27     12   352    (N)           clear    humid 
     20:00    34    24     10   344  (NNW)           clear     none 
     21:00    35    21     11   358    (N)    124    clear     none 
     22:00    36    19     15   354    (N)    120    clear     none 
     23:00    35    21      9    44   (NE)    258    clear     none 
     00:00    35    21      4   348  (NNW)    416    clear     none 
     01:00    35    19      2   321   (NW)    149    clear     none 
     02:00    34    20      4    77  (ENE)    109    clear     none 
     03:00    36    16     12    17  (NNE)    112    clear     none 
     04:00    37     3      3   324   (NW)    132 mstly clr    none 
     05:00    38     2      1   148  (SSE)    125 mstly clr    none 
     06:00    40     1      6   239  (WSW)     90 mstly clr    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