Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, March 13, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
WC01  A.Jaskot          A.Jaskot              
NM04  M.Cowles          M.Cowles,A.Menchaca   

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WC01  KOSMOS         19:31   01:01   
NM04  ARCTIC         01:17   06:45

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WC01/R      19:18  01:10    0    0    0    0   5.9  0.0   0    0
NM04/R      01:10  07:06    0    0    0    0   3.5  2.4   0    0

note: scheduled times listed include instrument change time

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

Cals were being taken at the start of the night.

Wonderful weather all night, only had a couple sparse clouds near sunrise. 

No 3.5m telescope or instrument problems tonight. (Arcsat is another story, see my email and PR2282.)



                    ------- 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
--------------------------------------------------------------------------
 18:55 kosmos   500( 1137)  14  59   9.5 11.3 11.1 11.3  9.6   --  1.08
 00:37 arctic   469( 1086)  25  53   9.3  8.8  9.4  8.7  9.1   SDSS_i  0.84
 02:22 arctic   466( 1057) -20  54   9.0  8.2  8.9  8.3  8.7   SDSS_u  1.03


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    52    13     10   305   (NW)    408    clear     none 
     17:00    52    11     13   321   (NW)    321    clear     none 
     18:00    53    13     13   279    (W)    397    clear     none 
     19:00    51    12      4   298  (WNW)    348    clear     none 
     20:00    50    12     12   295  (WNW)    375    clear     none 
     21:00    50    11     12   273    (W)    426    clear     none 
     22:00    50    11     11   256  (WSW)    453    clear     none 
     23:00    49    11      9   250  (WSW)    688    clear     none 
     00:00    50    13     10   265    (W)    546    clear     none 
     01:00    51    15     15   286  (WNW)    563    clear     none 
     02:00    47    14     15   335  (NNW)    547    clear     none 
     03:00    49    12      8     1    (N)    432    clear     none 
     04:00    49    10      3   259    (W)    304    clear     none 
     05:00    49     6     16   359    (N)    190 mstly clr    none 
     06:00    48     7     10    13  (NNE)    231 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