Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, May 17, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
CU02  A.Stephens        A.Stephens            
OU02  G.Jewett          G.Jewett              

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU02  KOSMOS         20:06   00:52   
OU02  ARCTIC         01:06   05:30

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU02/R      20:06  01:10    0    0    0    0   3.5  1.5   0    0
OU02/R      01:10  05:54    0    0    0    0   4.7  0.0   0    0

note: scheduled times listed include instrument change time

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

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
--------------------------------------------------------------------------
 20:40 kosmos   550( 1311) 214  77  13.4 14.2 14.6 14.0 13.2   --  0.93
 21:42 kosmos   525( 1218) 126  68  12.3 12.7 13.3 12.2 11.9   --  1.30
 01:13 arctic   489( 1176) 161  60  10.6 10.3 11.1 10.2 10.2   BG40  1.37
 01:14 NA2gdr 36550(36550) 161  60  10.7 10.3 11.1 10.2 10.2   clear  1.44

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    63    21     27   269    (W)   1580    clear     none 
     17:00    61    17     31   272    (W)   2010    clear     none 
     18:00    61    12     25   266    (W)   2885    clear     none 
     19:00    61    11     29   246  (WSW)   1863    clear     none 
     20:00    57    14     28   242  (WSW)   1494    clear     none 
     21:00    55    12     22   268    (W)   1753 mstly clr    none 
     22:00    54    12     21   246  (WSW)   1646 mstly clr    none 
     23:00    54    12     24   233   (SW)   1415 mstly clr    none 
     00:00    53    11     20   263    (W)   1459 mstly clr    none 
     01:00    51    13     20   245  (WSW)   1756    clear     none 
     02:00    50    17     21   255  (WSW)   1577    clear     none 
     03:00    49    19     21   254  (WSW)   1745    clear     none 
     04:00    47    18     21   263    (W)   1691    clear     none 
     05:00    46    20     17   268    (W)   1734 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