Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, April 08, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
OU02  G.Jewett          G.Jewett              
OU01  M.Kilic           M.Kilic&Class         
AP01  S.Merkowitz       R.McMillan            

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU02  ARCTIC         19:43   01:05   
OU01  ARCTIC         01:05   05:34
AP01  APOLLO         05:38   06:32

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU02/O      19:37  01:10    0    0    0    0   5.6  0.0   0    0
OU01/R      01:10  05:32    0    0    0    0   0.7  3.7   0    0
AP01/W      05:32  06:32    0    0    0    0   0.0  1.0   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend

Frozen dataq restarted at start of night. 

Clear night with good seeing! We got all 6 reflectors with APOLLO :)

Small power flash at 06:30, which seems to have interrupted APOLLO. No other problems! 

                    ------- 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
--------------------------------------------------------------------------
 20:19 arctic   449( 1171)  27  34   8.9 10.6 10.1  9.5  9.2   BG40  0.92
 01:16 arctic   471( 1072)  34  39   9.3  8.2  8.9  8.1  8.6   BG40  0.95 
 05:41 APOLLO     480( 1752)  17  29   9.3  7.8  8.5  7.7  8.5   530  1.10


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    53    24     13   269    (W)    538    clear     none 
     17:00    55    24     11   247  (WSW)    470    clear     none 
     18:00    52    20     11   277    (W)    479    clear     none 
     19:00    52    21      6   264    (W)    523    clear     none 
     20:00    47    22      5   241  (WSW)    489    clear     none 
     21:00    47    20      4   262    (W)    490    clear     none 
     22:00    50    18      2   222   (SW)    471    clear     none 
     23:00    50    25      2   214   (SW)    646    clear     none 
     00:00    49    25      5   244  (WSW)    672    clear     none 
     01:00    49    25      8   205  (SSW)    865    clear     none 
     02:00    49    27      9   187    (S)   1005    clear     none 
     03:00    48    28      8   201  (SSW)   1280    clear     none 
     04:00    46    28      6   249  (WSW)    929    clear     none 
     05:00    48    25      6   244  (WSW)    722    clear     none 
     06:00    49    25      6   252  (WSW)    693    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