Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, June 18, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW07  P.Szkody          P.Szkody              
OU04  N.Vernekar        N.Vernekar            

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW07  KOSMOS         --:--   --:--   
OU04  ECHELLE        01:20   05:17

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW07/R      20:23  01:10    1.5   3.3    0    0   0   0   0    0
OU04/R      01:10  05:46    0.2   0    0    0   4.4  0.0   0    0

note: scheduled times listed include instrument change time

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

Echelle checkout image looked like a bias with a few little dim lamp lights towards the bottom. I was able to fix it. See PR 2271 edits. 

Passing storms and radar kept us closed the first half of the night. Weather cleared just after 1am and I was able to open. 

Once the weather cleared it was a nice easy night. 

                    ------- 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
--------------------------------------------------------------------------
 01:28 ecamera    339(  273) 129  70  16.7 17.8 20.2 17.6 16.9   clear  1.03

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    68    37     13    79    (E)    790 mstly cldy   none 
     17:00    69    34      6    88    (E)    786 mstly cldy   none 
     18:00    70    33      4    95    (E)    866 mstly cldy   none 
     19:00    72    37      8   183    (S)   1078 mstly cldy   none 
     20:00    68    40     12   267    (W)   1744 mstly cldy   dust 
     21:00    63    39      7    32  (NNE)   1814  ptly cldy lt rain
     22:00    64    37      1    15  (NNE)   1563  ptly cldy   none 
     23:00    63    38      1   213  (SSW)   1590  ptly cldy   none 
     00:00    61    40      2    65  (ENE)   2168 mstly clr    none 
     01:00    65    35      2   270    (W)   1104    clear     none 
     02:00    60    45      7    92    (E)   2350    clear     none 
     03:00    61    41     11   193  (SSW)   2717    clear     none 
     04:00    60    45      8   183    (S)   2441    clear     none 
     05:00    59    46     11   217   (SW)   2448    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: 3.1.8