Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, June 07, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW01  P.Yoachim         D.Meng, Z.Xu, Z.Lui   
CU01  A.Stephens        A.Stephens                                                          

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW01  KOSMOS         20:19   23:10   
CU01  KOSMOS         23:10   05:13                             

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW01/R      20:19  23:10    0    0    0    0   2.9  0.0   0    0
CU01/R      23:10  05:46    0    0    0    0   2.0  4.6   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky

Echelle LN2 was at 218 during afternoon fills, this is a little more than normal, but not unexpected with warmer temps and current vacuum.  I filled it a little fuller to 296# this evening.

Echelle cal filter didn't move during IOL, I just took a second set and that fixed the issue.  This is a known problem that happens every once and a while.

Echelle LN2 at 250#, normal, at end of night. It had just finished an Echelle fill as I was in the enclosure.

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
--------------------------------------------------------------------------
 20:49 kosmos   515( 1506)  -8  75  18.4 19.1 19.3 18.7 18.2   --  0.97
 23:19 kosmos   490( 1397) -76  51  17.2 17.0 17.7 16.9 17.0   --  0.97

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    72    26     20   268    (W)   1365 mstly clr    none 
     17:00    72    28      9   268    (W)   1508 mstly clr    none 
     18:00    73    28      6   201  (SSW)   1501  ptly cldy   none 
     19:00    71    30      9   234   (SW)   1583  ptly cldy   none 
     20:00    65    28     13   237  (WSW)   1987  ptly cldy   none 
     21:00    65    28      8   262    (W)   2310 mstly clr    none 
     22:00    64    30     12   262    (W)   2197 mstly clr    none 
     23:00    64    30      5   260    (W)   2262 mstly clr    none 
     00:00    62    31      8   267    (W)   2338 mstly clr    none 
     01:00    62    32      4   288  (WNW)   2554  ptly cldy   none 
     02:00    62    32     10   334  (NNW)   2490  ptly cldy   none 
     03:00    62    32     11   305   (NW)   2510  ptly cldy   none 
     04:00    62    32      4   304   (NW)   2390 mstly clr    none 
     05:00    61    31      6   357    (N)   2409 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