Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, April 24, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
JH01  P.McCreery        P.McCreery, K.Schlaufman, Z.Rustamkulov                                              

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
JH01  ARCTIC         19:55   05:59                                

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
JH01/R      19:49  06:14    0    0    0    0   3.1  7.4   0    0

note: scheduled times listed include instrument change time

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

No problems tonight other than clouds.

                    ------- 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
--------------------------------------------------------------------------
 20:37 arctic   525( 1260) 137  75  10.9 11.5 11.5 11.1 10.6   sdss_i  0.90

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------	
     16:00    56    15     24   269    (W)   1579 mstly clr    none 
     17:00    56    16     23   256  (WSW)   1580  ptly cldy   none 
     18:00    54    12     23   256  (WSW)   1684  ptly cldy   none 
     19:00    54    16     20   265    (W)   1664 mstly clr    none 
     20:00    51    16     15   261    (W)   1529  ptly cldy   none 
     21:00    51    17     15   266    (W)   1457 mstly cldy   none 
     22:00    51    18     13   264    (W)   1566  ptly cldy   none 
     23:00    51    17     16   266    (W)   1580  ptly cldy   none 
     00:00    50    15     16   268    (W)   1564  ptly cldy   none 
     01:00    50    14     13   260    (W)   1650 mstly cldy   none 
     02:00    48    14     16   264    (W)   1686 mstly cldy   none 
     03:00    48    14     12   266    (W)   1487  ptly cldy   none 
     04:00    48    14      9   257  (WSW)   1457  ptly cldy   none 
     05:00    47    16     14   253  (WSW)   1615  ptly cldy   none 
     06:00    45    18     15   274    (W)   1636  ptly 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