Subject: 3.5m Night Log 20250620
From: cgray@apo.nmsu.edu
Date: Sat, 21 Jun 2025 10:30:09 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, June 20, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
WY01  M.Moe             M.Moe and class
AP01  S.Merkowitz       R.McMillan
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY01  KOSMOS         21:48   23:35
AP01  APOLLO         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY01/O      20:23  04:47   4.2  2.4   0    0   1.8  0.0   0    0
AP01/R      04:47  05:47   0.0  1.0   0    0    0    0    0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
- There was a motion error in altitude coming down from 80 during test slews.
- Dataq needed a restart.
- The Kosmos disperser got stuck on "moving" while trying to switch from an empty slot to blue. I tried moving kosmos to a rotation of zero and moving the disperser again with no luck. I had to go upstairs and move it by hand.
The night started with lots of virga and clouds. I don't think the rain ever technically reached the ground, but we were surrounded for a while and the dust was high. The clouds cleared and the dust stayed down long enough for the REU class to get almost two hours on sky. Then the dust jumped agin, peaking around 15K.  It was still over 10K at 4:30 and we called it.
                    ------- 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
--------------------------------------------------------------------------
 22:06 kosmos   215( 1452) 123  73  18.9 20.1 20.5 19.7 19.3   --  1.56
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    73    37     10   197  (SSW)   2851  ptly cldy   none
     17:00    73    35     20   212  (SSW)   3096  ptly cldy   none
     18:00    75    34     11   248  (WSW)   3175  ptly cldy   dust
     19:00    74    38     17   183    (S)   3028  ptly cldy   dust
     20:00    65    42     21   133   (SE)   2941  ptly cldy   dust
     21:00    65    39     19   136   (SE)   3319    clear     none
     22:00    66    34     19   153  (SSE)        mstly clr    none
     23:00    67    32     14   179    (S)   3576    clear     dust
     00:00    64    40     15   159  (SSE)  45711    clear     dust
     01:00    65    37     26   200  (SSW)   4864    clear     dust
     02:00    64    35     23   192  (SSW)   5247    clear     dust
     03:00    62    39     20   210  (SSW)  11332    clear     none
     04:00    62    24     14   239  (WSW)  10278    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