Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, May 30, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UV05  J.Davidson        J.Davidson,J.Winters,J.Beck
AP01  S.Merkowitz       R.McMillan,T.Sutherland
OU05  N.Vernekar        N.Vernekar            

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UV05  DSSI           20:14   00:10   
AP01  APOLLO         00:13   01:07
OU05  ECHELLE        01:14   05:15

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UV05/O      20:14  00:10    0    0    0    0   0.0  3.9   0    0
AP01/R      00:10  01:10    0    0    0    0   0.0  1.0   0    0
OU05/R      01:10  05:48    0    0    0    0   0.0  4.6   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: H.Abbot

Beautifully clear night with no 3.5m telescope or instrument issues. 

ACP froze and crashed multiple times through the night, eventually seemed to be resolved with a full PC restart.

                    ------- 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
--------------------------------------------------------------------------
 20:32 dssi       506( 1689) 114  47  13.0 14.3 14.7 13.6 12.9   692nm  0.60
 00:16 APOLLO     446( 1926)  11  30  13.1 12.2 12.9 12.6 12.8   530    1.10
 01:18 ecamera    469(  149) -24  39  12.8 12.0 12.7 12.0 12.5   ND1    0.97

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    61    17     23   265    (W)   1362    clear     none 
     17:00    65    17     11   255  (WSW)   1380    clear     none 
     18:00    64    16     22   221   (SW)   1514    clear     none 
     19:00    60    13     16   267    (W)   1478    clear     none 
     20:00    57    13     11   247  (WSW)   1385    clear     none 
     21:00    56    14     13   248  (WSW)   1757    clear     none 
     22:00    56    14     15   227   (SW)   1396    clear     none 
     23:00    56    15     14   235   (SW)   1500    clear     none 
     00:00    56    15     11   246  (WSW)   1447    clear     none 
     01:00    55    16     10   263    (W)   1518    clear     none 
     02:00    55    17      7   260    (W)   1594    clear     none 
     03:00    56    15     17   293  (WNW)   1664    clear     none 
     04:00    55    14     12   272    (W)   1557    clear     none 
     05:00    54    14      9   321   (NW)   1704    clear     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