Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, October 22, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
GS05  G.Schaefer        J.Davidson            
UV04  Y.Zhou            J.Davidson            

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
GS05  DSSI           --:--   --:--   
UV04  DSSI           04:55   07:04

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
GS05/R      18:31  01:10    0   6.7   0    0   0.0  6.7   0    0
UV04/R      01:10  07:05   0.3  3.4   0    0   2.2  0.0   0    0

note: scheduled times listed include instrument change time

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

Clouds kept us closed until 04:50.  As soon as we opened the clouds returned and we fought them the remainder of the night.

No telescope issues 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
--------------------------------------------------------------------------
 05:06 dssi   475( 1261) 261  80  10.8 10.5 10.9 10.6 10.7   692  0.50

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    58    41      8   177    (S)    189   cloudy     none 
     17:00    56    44     24   145   (SE)    268   cloudy     none 
     18:00    55    41     29   132   (SE)    242   cloudy     none 
     19:00    55    37     23   126   (SE)    209   cloudy     none 
     20:00    54    39     24   138   (SE)    321   cloudy     none 
     21:00    52    44     26   147  (SSE)          cloudy     none 
     22:00    52    41     20   154  (SSE)          cloudy     none 
     23:00    51    42     22   159  (SSE)          cloudy     none 
     00:00    53    39     21   160  (SSE)    417   cloudy     none 
     01:00    53    40     18   181    (S)    268   cloudy     none 
     02:00    52    41     20   182    (S)    211 mstly cldy   none 
     03:00    51    42     17   184    (S)        mstly cldy   none 
     04:00    51    42      6   179    (S)        mstly cldy   none 
     05:00    52    41     16   183    (S)    181 mstly cldy   none 
     06:00    50    42      9   185    (S)        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: 3.2.2