Subject: 3.5m Night Log 20251130
From: ajt@apo.nmsu.edu
Date: Mon,  1 Dec 2025 13:50:55 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, November 30, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
OU05  J.Serna           J.Serna
OU03  G.Jewett          G.Jewett
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU05  TSPEC          17:50   23:57
OU03  ARCTIC         00:13   02:50
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU05/R      17:06  00:10    0    0    0    0   0.0  7.1   0    0
OU03/R      00:10  06:39   3.7  0.1   0    0   0.0  2.7   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
Restarted frozen dataq at start of night.
Rain alarm went off a few times tonight despite lack of precipitation, first time was at about 50% humidity.
Closed up a little before 03:00 due to humidity. We were unable to reopen.
We had some clouds at the start of the night but were able to observe through them. It cleared up but seeing got worse, and humidity rose until it was too much and we had to close. Intermittent clouds and fog came back with the humidity as well.
ARCTIC ion pump was off this morning when I went up to dismount ARCTIC. My 2 attempts to restart HV did not work, Cary is going to check it out.
                    ------- 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
--------------------------------------------------------------------------
 17:57 tcamera    458(  898) 168  62   2.2  1.9  3.0  2.9  1.9   Ks  1.24
 00:22 arctic   521(  771) 142  35   1.4  0.6  1.6  1.0  1.2   BG40  2.64
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    37    25     13   213  (SSW)    577  ptly cldy   none
     17:00    36    23     13   253  (WSW)    554  ptly cldy   none
     18:00    36    17     17   226   (SW)    342  ptly cldy   none
     19:00    37    15     16   237  (WSW)    362  ptly cldy   none
     20:00    36    21      8   214   (SW)    560    clear     none
     21:00    36    26     10   247  (WSW)           clear     none
     22:00    36    25     14   255  (WSW)    661    clear     none
     23:00    36    25     21   215   (SW)    693    clear     none
     00:00    35    28     20   213  (SSW)           clear    humid
     01:00    34    29     18   199  (SSW)         ptly cldy  humid
     02:00    33    29     20   238  (WSW)         ptly cldy  humid
     03:00    32    29     14   248  (WSW)         ptly cldy  humid
     04:00    32    29     18   220   (SW)         ptly cldy  humid
     05:00    32    28     15   254  (WSW)          cloudy    humid
     06:00    31    29     13   253  (WSW)          cloudy     fog
     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