Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, June 17, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
AP01  S.Merkowitz       R.McMillan,T.Sutherland
NM07  T.McQuaid         T.McQuaid             
UW02  B.Benda           B.Benda               

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AP01  APOLLO         --:--   --:--   
NM07  ECHELLE        23:41   01:07
UW02  ECHELLE        01:08   04:45

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
AP01/R      20:22  21:22    1    0    0    0   0.0   0   0    0
NM07/R      21:22  01:10    1.3   1.7   0    0   0.8   0   0    0
UW02/R      01:10  05:46    0    0    0    0   4.6  0.0   0    0

note: scheduled times listed include instrument change time

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

A dusty and cloudy start to the evening. Dust cleared just before midnight and I was able to open.

Observer called it quits early because the targets were setting. 

No echelle iol this morning since cals were being taken.

No 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
--------------------------------------------------------------------------
 23:46 ecamera    446(  447) 208  84  18.2 19.4 21.6 19.3 18.1   clear  0.90
 01:13 ecamera    428(  363) -130  47  17.8 17.6 18.6 17.1 17.2   ND2  1.17




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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    78    30     19   286  (WNW)    875  ptly cldy   none 
     17:00    79    31     14   261    (W)    893  ptly cldy   none 
     18:00    76    29     13   250  (WSW)    850 mstly cldy   dust 
     19:00    71    33     14   268    (W)  10354 mstly cldy   dust 
     20:00    68    33     17   275    (W)  19153 mstly cldy   dust 
     21:00    65    33     15   323   (NW)  22898 mstly cldy   dust 
     22:00    65    33      6   308   (NW)  11508 mstly cldy   dust 
     23:00    65    33     18   311   (NW)   4225  ptly cldy   dust 
     00:00    64    34     13   307   (NW)   1875  ptly cldy   none 
     01:00    63    34      5   326   (NW)   1171 mstly clr    none 
     02:00    63    34      2   309   (NW)   2157 mstly clr    none 
     03:00    62    34      5   289  (WNW)   1245 mstly clr    none 
     04:00    61    35      9     1    (N)    902 mstly clr    none 
     05:00    61    35     11   356    (N)    867 mstly clr    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