Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, July 17, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
AP01  S.Merkowitz       R.McMillan            
UW10  I.Chow            I.Chow,C.Chandler,J.Murtagh,D.Singh
NM04  M.Prescott        M.Prescott,J.Burchett 

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AP01  APOLLO         --      --      
UW10  ARCTIC         --      --
NM04  KOSMOS         --      --

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
AP01/R      20:20  21:20    0   1.0   0    0   0.0  0.0   0    0
UW10/R      21:20  01:10   2.5  1.3   0    0   0.0  0.0   0    0
NM04/R      01:10  05:59   4.8   0    0    0   0.0  0.0   0    0

note: scheduled times listed include instrument change time

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

Stayed closed entire night for heavy clouds and rain which started at 19:56 and continued intermittently throughout the entire night.

B-half called it a night at 04:15

                    ------- 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    64    45      4   319   (NW)   1852   cloudy     none 
     17:00    70    47     14   259    (W)   2024   cloudy     none 
     18:00    64    47      9   240  (WSW)   2036   cloudy     none 
     19:00    58    49     13   165  (SSE)          cloudy   lt rain
     20:00    57    47     14   126   (SE)          cloudy   lt rain
     21:00    58    46      2   133   (SE)   1875   cloudy   lt rain
     22:00    59    47      9   282  (WNW)   1959   cloudy   lt rain
     23:00    58    49      1   356    (N)          cloudy   lt rain
     00:00    55    50      5   202  (SSW)          cloudy   lt rain
     01:00    54    49      9   205  (SSW)          cloudy   lt rain
     02:00    53    52      5   204  (SSW)          cloudy     rain 
     03:00    52    51      3   253  (WSW)          cloudy     rain 
     04:00    52    50      4   229   (SW)          cloudy     rain 

     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: