Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, September 03, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
OU04  N.Vernekar        M.Barrientos          
UW02  J.Murtagh         J.Murtagh             

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU04  ARCTIC         --:--   --:--   
UW02  ARCTIC         --:--   --:--

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU04/R      19:34  01:10  3.8  1.8    0    0   0.0  0.0   0    0
UW02/R      01:10  06:32    0  5.4    0    0   0.0  0.0   0    0

note: scheduled times listed include instrument change time

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

OU04 was scheduled to have Echelle but had requested ARCTIC in the email.

Heavy rain bearing clouds for the majority of the night, with high dust counts towards the end leaving not enough time for UW02 observer to get necessary on-sky time.

No telescope or instrument 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
--------------------------------------------------------------------------

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    71    46      6   199  (SSW)   1124   cloudy     none 
     17:00    74    47      8   258  (WSW)   1154   cloudy     none 
     18:00    68    47      7   247  (WSW)   1121   cloudy     none 
     19:00    66    45      1   232   (SW)   1203   cloudy     none 
     20:00    65    47     14   194  (SSW)   1148   cloudy     none 
     21:00    58    45     17   143   (SE)    727   cloudy     none 
     22:00    61    32      6   190    (S)    859   cloudy     none 
     23:00    57    32      9   189    (S)   1297   cloudy     none 
     00:00    57    31     18   132   (SE)    992   cloudy     none 
     01:00    56    31     22   131   (SE)   1304   cloudy     none 
     02:00    56    31     18   171    (S)   1407   cloudy     none 
     03:00    55    30     15   202  (SSW)   1524 mstly cldy   none 
     04:00    55    29      6   196  (SSW)   6321 mstly cldy   dust 
     05:00    58    29      3   257  (WSW)   2454  ptly cldy   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: 3.2.2