Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, June 13, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW01  P.Yoachim         Z.Liu,D.Meng,Z.Xu     
WY01  M.Brotherton      M.Brotherton          
CU02  A.Stephens        A.Stephens            

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW01  KOSMOS         --:--   --:--   
WY01  KOSMOS         --:--   --:--
CU02  KOSMOS         --:--   --:--

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW01/R      20:21  23:30  3.1    0    0    0   0.0  0.0   0    0
WY01/R      23:30  01:10  1.7    0    0    0   0.0  0.0   0    0
CU02/R      01:10  05:46  3.8   0.8   0    0   0.0  0.0   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend

ARCTIC LL saturated at checkout, Encl T 19.3. 

Overcast with nearby storms this evening which turned into a few hours of heavy thunderstorms. Things started clearing up a little bit after 03:00 but not clear enough to get on sky. 

No telescope problems. 


                    ------- 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
--------------------------------------------------------------------------

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    74    52      4   213  (SSW)   2769   cloudy     none 
     17:00    73    48     13   214   (SW)   2856   cloudy     none 
     18:00    73    42      9   233   (SW)   3222   cloudy     none 
     19:00    69    41      5   261    (W)   3015   cloudy     none 
     20:00    68    41      5   262    (W)   3083   cloudy     none 
     21:00    65    47      9   128   (SE)   2971   cloudy     rain 
     22:00    62    46      7   290  (WNW)   6174   cloudy     rain 
     23:00    54    33     10   341  (NNW)   2796   cloudy     rain 
     00:00    56    32     12    72  (ENE)   1479   cloudy     rain 
     01:00    56    32     10    91    (E)    767   cloudy     none 
     02:00    59    32     10    17  (NNE)   1193   cloudy     none 
     03:00    59    32      8    16  (NNE)    751  ptly cldy   none 
     04:00    60    32     20    66  (ENE)    845 mstly cldy   none 
     05:00    62    32     19    57  (ENE)   2161 mstly 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