Subject: 3.5m Night Log 20251120
From: tsutherland@apo.nmsu.edu
Date: Fri, 21 Nov 2025 11:58:02 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, November 20, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW06  P.Szkody          P.Szkody
UV02  A.Verbiscer       A.Verbiscer
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW06  KOSMOS         --:--   --:--
UV02  ARCTIC         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW06/R      17:08  00:10    7.0    0    0    0   0   0.0   0    0
UV02/R      00:10  06:31    6.3    0    0    0   0   0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland
Snowy weather during the day made it so we couldn't open due to some snow on the dome. It was also super foggy and humid all night.
Arctic filter wheel got stuck on moving. Thanks Bill for helping get it fixed.
3.5m outdoor weather station was frozen and giving wrong humidity/dewpoint values all night. In the weather section of this report, don't pay attention to the dewpopint and dust counts.
Gave up at 4am.
                    ------- 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    30   -39     20   265    (W)  47647   cloudy   lt snow
     17:00    30   -39     25   275    (W)  44819 mstly cldy   fog
     18:00    30   -39     18   266    (W)  29565  ptly cldy   fog
     19:00    28   -39     22   267    (W)  72772 mstly clr    fog
     20:00    29   -38     17   253  (WSW)   5656 mstly clr    fog
     21:00    30   -36     19   269    (W)  24388 mstly clr    fog
     22:00    30   -33     13   269    (W)  51034 mstly clr    fog
     23:00    28   -34     11   269    (W)   1306 mstly clr   humid
     00:00    26   -33     13   291  (WNW)     75 mstly clr   humid
     01:00    26   -33     14   309   (NW)     60 mstly clr   humid
     02:00    26   -36     13   310   (NW)     25 mstly clr   humid
     03:00    26   -37     12     3    (N)     17 mstly clr   humid
     04:00    26   -38     13   336  (NNW)     17 mstly clr   humid
     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