Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, March 21, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
AP01  S.Merkowitz       R.McMillan, T.Sutherland
NM06  W.Roberson        E.Nielsen, A.Abbas    
UW02  P.Yoachim         D.Meng, Z.Xu, Z.Liu   
UW04  B.Choi            B.Choi                

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AP01  APOLLO         19:24   20:20   
NM06  ECHELLE        20:25   22:38
UW02  KOSMOS         22:39   01:05
UW04  ECHELLE        01:06   06:43

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
AP01/R      19:24  20:24    0    0    0    0   0.0  1.0   0    0
NM06/R      20:24  22:45    0    0    0    0   0.1  2.3   0    0
UW02/R      22:45  01:10    0    0    0    0   2.4  0.0   0    0
UW04/R      01:10  06:56    0    0    0    0   5.8  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
--------------------------------------------------------------------------
 19:29 APOLLO     525( 2297) -63  61  17.0 19.0 18.9 18.3 17.1   --  1.50
 20:29 ecamera    489(  404) -140  58  16.7 17.3 17.7 16.7 16.3   ND1  1.01
 22:50 kosmos   450( 1264) 137  75  16.1 15.3 16.2 15.1 15.2   --  1.16
 01:10 ecamera    471(  264)  31  73  15.7 14.9 15.7 14.6 14.9   ND1  0.79

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------	
     16:00    67    20     11   263    (W)    412    clear     none 
     17:00    69    20     12   256  (WSW)    264    clear     none 
     18:00    68    20      8   260    (W)    296    clear     none 
     19:00    65    16      8   223   (SW)    386    clear     none 
     20:00    62    13      9   239  (WSW)    394    clear     none 
     21:00    62    12      9   209  (SSW)    557    clear     none 
     22:00    61    12     12   219   (SW)    543    clear     none 
     23:00    62    12     13   209  (SSW)    480    clear     none 
     00:00    61    12     13   216   (SW)    446    clear     none 
     01:00    59    11      9   252  (WSW)    405    clear     none 
     02:00    60    11      8   274    (W)    334    clear     none 
     03:00    61    11     10   279    (W)    359    clear     none 
     04:00    57     8      7   316   (NW)    350    clear     none 
     05:00    59    11     14     1    (N)    337    clear     none 
     06:00    60    10     20    31  (NNE)    340    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