Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, April 25, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
CU05  J.Bally           J.Bally               
CU01  A.Stephens        A.Stephens, P.Wachiraphan
WY01  M.Brotherton      M.Brotherton, K.Zhang 
                                              
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU05  TSPEC          --:--   --:--   
CU01  KOSMOS         --:--   --:--
WY01  KOSMOS         04:10   05:25
                             
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU05/R      19:49  22:35    0   2.8   0    0   0.0  0.0   0    0
CU01/R      22:35  04:20   0.6  5.1   0    0   0.0  0.0   0    0
WY01/R      04:20  06:13    0    0    0    0   1.9  0.0   0    0

note: scheduled times listed include instrument change time

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

Clouds kept us closed until 23:10.  We still had clouds but no threat of rain nearby so I felt safe to open.  Clouds quickly re-formed over us and the 2nd program got nothghing useful at all.  They gave up at 02:00.  

The clouds parted ways around 03:40.  I spent the extra time focusing and getting ready for my last program of the night so they could get going as soon as they logged in.

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
--------------------------------------------------------------------------
 23:23 kosmos   425( 1019) 144  39   9.9 10.1 10.4 10.1  9.6   --  1.50
 03:54 khigh   475(  913) 180  63   7.6  7.2  7.9  7.1  7.1   --  1.20

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    56    16     17   234   (SW)   1270   cloudy     none 
     17:00    55    14     17   236   (SW)   1064   cloudy     none 
     18:00    53    14     21   250  (WSW)   1149   cloudy     none 
     19:00    53    15     19   268    (W)   1006   cloudy     none 
     20:00    52    14     10   265    (W)    900   cloudy     none 
     21:00    51    15     10   258  (WSW)    983   cloudy     none 
     22:00    50    14     10   261    (W)   1098 mstly cldy   none 
     23:00    50    14     17   257  (WSW)   1109 mstly cldy   none 
     00:00    49    14     11   269    (W)   1252   cloudy     none 
     01:00    48    17      9   264    (W)   1389   cloudy     none 
     02:00    47    20     14   273    (W)   1497   cloudy     none 
     03:00    47    21     24   278    (W)   1508 mstly cldy   none 
     04:00    46    22     16   266    (W)   1346 mstly clr    none 
     05:00    45    22     15   256  (WSW)   1348 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