Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, June 11, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW02  B.Benda           B.Benda               
JH04  N.Myers           N.Myers,J.Mendo       

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW02  ECHELLE        20:40   00:08   
UW02  ECHELLE        00:28   01:03
JH04  ECHELLE        01:03   05:26

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW02/R      20:20  01:10  0.3    0    0    0   4.5  0.0   0    0
JH04/R      01:10  05:46    0    0    0    0   2.1  2.5   0    0

note: scheduled times listed include instrument change time

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

Clouds came in just as a pollen spike happened so closed at 00:08. Pollen went away pretty quickly though, so reopened in 20 minutes. Clouds lingered around all night but was able to observe through most of it.

Nice and smooth night with 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
--------------------------------------------------------------------------
 20:50 ecamera    321(  474) 238  62  21.1 22.4 22.0 21.3 20.8   ND3  0.73
 01:14 ecamera    471(  418) 148  50  18.3 17.9 18.5 17.7 17.8   Clear  1.30

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    75    28      8   291  (WNW)   1007  ptly cldy   none 
     17:00    75    27     11   264    (W)   1090  ptly cldy   none 
     18:00    76    28     10   282  (WNW)    945  ptly cldy   none 
     19:00    74    27      5   270    (W)    850 mstly cldy   none 
     20:00    71    22      3   248  (WSW)    924  ptly cldy   none 
     21:00    69    20      3   193  (SSW)    890 mstly cldy   none 
     22:00    69    20      7   158  (SSE)    866 mstly clr    none 
     23:00    70    21      5   181    (S)    823    clear     none 
     00:00    64    37     22   135   (SE)   1585   cloudy     none 
     01:00    65    42     22   142   (SE)   1752   cloudy     none 
     02:00    65    41     16   167  (SSE)   1864  ptly cldy   none 
     03:00    65    39     18   170    (S)   1642 mstly clr    none 
     04:00    64    40     20   151  (SSE)   1527 mstly clr    none 
     05:00    64    38     17   159  (SSE)   1414  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: 3.1.8