Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, March 25, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
OU01  G.Jewett          M.Barrientos          
UV05  A.Verbiscer       A.Verbiscer           

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU01  ARCTIC         19:27   01:09   
UV05  ARCTIC         01:10   06:38

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU01/R      19:27  01:10    0    0    0    0   0.0  5.7   0    0
UV05/R      01:10  06:51    0    0    0    0   3.7  1.9   0    0

note: scheduled times listed include instrument change time

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

Beautifully clear night throughout with no telescope issues to report.

                    ------- 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
--------------------------------------------------------------------------
 20:06 arctic   354( 1482)  44  25  17.0 19.1 18.9 18.3 17.4   BG40  1.39
 23:18 arctic   518( 1480)  -8  38  16.3 15.9 16.7 15.8 16.0   BG40  1.27
 01:14 arctic   523( 1452)  -2  55  16.1 15.4 16.2 15.6 15.7   r     0.77
 02:20 arctic   501( 1434) -29  51  16.3 15.4 16.2 15.5 15.9   r     0.74

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    73    24     14   234   (SW)    618    clear     none 
     17:00    73    22     16   245  (WSW)    567    clear     none 
     18:00    68    22      8   274    (W)    707    clear     none 
     19:00    67    18     10   239  (WSW)    560    clear     none 
     20:00    62    18     11   232   (SW)    650    clear     none 
     21:00    62    17     12   222   (SW)   1345    clear     none 
     22:00    63    16      7   196  (SSW)    830    clear     none 
     23:00    61    16     13   202  (SSW)    754    clear     none 
     00:00    62    14      8   212  (SSW)    675    clear     none 
     01:00    60    11      6   251  (WSW)    595    clear     none 
     02:00    61     9      6   214   (SW)    507    clear     none 
     03:00    61    12     11   216   (SW)    484    clear     none 
     04:00    60    11      7   255  (WSW)    526    clear     none 
     05:00    61    12      9   264    (W)    417    clear     none 
     06:00    60    11      9   252  (WSW)    388    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