Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, August 05, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW06  C.Orion           J.Murtagh,I.Chow,D.Singh
UW01  P.Yoachim         D.Meng,Z.Xu           
NM07  E.Serviss         E.Serviss,A.Smith     

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW06  ARCTIC         20:52   21:58   
UW01  KOSMOS         --      --
NM07  ECHELLE        --      --

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW06/R      20:07  01:10   2.6  1.4   0    0   1.1  0.0   0    0
UW01/R      01:10  03:41    0   2.5   0    0   0.0  0.0   0    0
NM07/R      03:41  06:12    0   2.5   0    0   0.0  0.0   0    0

note: scheduled times listed include instrument change time

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

Stayed closed at start of night due to nearby storm clouds, opened at 20:52 after the heavy nearby clouds dissipated, although some thin clouds remained. 

Closed again at 21:58 after a storm cloud rolled in close to us. Dust counts climbed over 4000 cts shortly after we closed too

Dust remained between 4000-5000 counts for the remainder of the night. B-half called it a night at twilight.






                    ------- 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
--------------------------------------------------------------------------
 21:11 arctic   398( 1535)  47  21  19.9 21.3 21.8 21.1 20.1   sdss_r  2.90
 21:13 NA2gdr 33705(33705)  46  22  19.7 21.2 21.8 21.0 20.1   R  1.90


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    73    46      6   155  (SSE)   3173   cloudy     none 
     17:00    68    49      2   337  (NNW)   3150   cloudy     none 
     18:00    71    47      3   119  (ESE)   3106   cloudy   lt rain
     19:00    73    45      2   173    (S)   3171   cloudy   lt rain
     20:00    69    45     12   114  (ESE)   3157  ptly cldy   none 
     21:00    68    44     10   114  (ESE)   3431  ptly cldy   none 
     22:00    69    44     14   133   (SE)   3849  ptly cldy   dust 
     23:00    67    45     13   135   (SE)   4178  ptly cldy   dust 
     00:00    66    42     14   143   (SE)   4372  ptly cldy   dust 
     01:00    67    43     10   185    (S)   4280  ptly cldy   dust 
     02:00    68    42      7   200  (SSW)   3939  ptly cldy   dust 
     03:00    67    42      5   233   (SW)   3992  ptly cldy   dust 
     04:00    66    43      9   221   (SW)   4377  ptly cldy   dust 
     05:00    65    44      9   215   (SW)   4979  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
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