Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, April 10, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
BY01  S.Richmond        S.Richmond                                 

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
BY01  TSPEC          --:--   --:--   
BY01  TSPEC          --:--   --:--

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
BY01/R      19:38  01:10   5.5    0    0    0   0  0.0   0    0
BY01/R      01:10  06:30   2.1   3.3    0    0   0   0   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland

Nearby radar returns and clouds kept us closed all night. 

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

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    55    30      4   135   (SE)    613   cloudy     none 
     17:00    53    32     10   101    (E)    641   cloudy     none 
     18:00    54    30     15   149  (SSE)    786   cloudy     none 
     19:00    52    32     16   129   (SE)    685   cloudy     rain 
     20:00    42    41     23   208  (SSW)          cloudy   lt rain
     21:00    46    36     18   144   (SE)          cloudy   lt rain
     22:00    44    35     12   109  (ESE)   4911   cloudy     dust 
     23:00    48    33     20   166  (SSE)   2563   cloudy     none 
     00:00    47    34     19   161  (SSE)   2107   cloudy     none 
     01:00    46    38     20   140   (SE)          cloudy     none 
     02:00    48    35     15   171    (S)   2082   cloudy     none 
     03:00    48    35     18   188    (S)   1586 mstly cldy   none 
     04:00    47    35     14   181    (S)   2125 mstly cldy   none 
     05:00    47    35     14   175    (S)   2406 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