Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, June 20, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
AP01  S.Merkowitz       R.McMillan,T.Sutherland
NM08  A.Peck            A.Smith,A.Neeld,A.Abbas
UW12  C.Chandler        J.Murtagh,I.Chow,D.Singh,C.Gray

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AP01  APOLLO         20:23   21:18   
NM08  ECHELLE        21:23   01:03
UW12  ARCTIC         01:07   05:32

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
AP01/R      20:23  21:23    0    0    0    0   0.0  1.0   0    0
NM08/R      21:23  01:10    0    0    0    0   0.5  3.3   0    0
UW12/R      01:10  05:47    0    0    0    0   4.6  0.0   0    0

note: scheduled times listed include instrument change time

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

Another night of beautiful weather.

No telescope or instrument problems tonight. 

                    ------- 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
--------------------------------------------------------------------------
 20:26 APOLLO     450( 2338) -53  63  20.5 21.5 21.5 20.8 19.9   --  1.10
 21:28 ecamera    603(  659)   2  44  20.1 20.1 20.6 19.8 19.8   ND2  2.14
 01:13 arctic   484( 1530) -24  80  18.8 18.2 18.9 18.1 18.4   CUVR  0.62


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    74    39      8   260    (W)   1245 mstly clr    none 
     17:00    72    38     12   261    (W)   1339 mstly clr    none 
     18:00    72    38     13   242  (WSW)   1282    clear     none 
     19:00    74    37      9   248  (WSW)   1303    clear     none 
     20:00    70    34     10   253  (WSW)   1174    clear     none 
     21:00    68    33     11   250  (WSW)   1276    clear     none 
     22:00    68    33     15   252  (WSW)   1386    clear     none 
     23:00    67    32     14   254  (WSW)   1165    clear     none 
     00:00    66    32     11   265    (W)   1277    clear     none 
     01:00    66    31      9   265    (W)   1168    clear     none 
     02:00    65    31     10   267    (W)   1104    clear     none 
     03:00    65    31     19   299  (WNW)   1144    clear     none 
     04:00    64    31     11   306   (NW)   1141    clear     none 
     05:00    62    31     13   308   (NW)   1055    clear     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: