Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, June 04, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
EN01  B.Ketzeback       T.Sutherland,R.McMillan
                                              

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
EN01  ARCTIC         --:--   --:--   
                             

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
EN01/R      20:17  01:10   3.5   1.4    0    0   0   0   0    0
EN01/R      01:10  05:46    0   4.6    0    0   0.0  0   0    0

note: scheduled times listed include instrument change time

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

More crummy weather all night. No on sky engineering was able to be done. Gave up at 3am since weather looked pretty hopeless.

Engineering tasks completed:
ecam focus and new mask
periodic arctic checks
wiki updates

Since I called it quits early, I topped off echelle during morning fills.

                    ------- 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
--------------------------------------------------------------------------


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    58    32     11   322   (NW)    806 mstly cldy   none 
     17:00    63    32      6   152  (SSE)    680 mstly cldy   none 
     18:00    62    32      2   198  (SSW)    869 mstly cldy   none 
     19:00    58    32      3   223   (SW)    814 mstly cldy   none 
     20:00    55    31      2   233   (SW)    843   cloudy     none 
     21:00    54    31      6   295  (WNW)    766   cloudy     none 
     22:00    53    31      5   245  (WSW)    775   cloudy     none 
     23:00    53    31      6   121  (ESE)    803   cloudy   lt rain
     00:00    53    30      5   117  (ESE)    884   cloudy     none 
     01:00    53    30      3   199  (SSW)    849   cloudy     none 
     02:00    53    30      1   281    (W)   1516   cloudy     none 
     03:00    52    30      2   328  (NNW)    871   cloudy     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