Subject: 3.5m Night Log 20250531
From: mcroom@apo.nmsu.edu
Date: Sun,  1 Jun 2025 11:32:26 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, May 31, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW06  A.Heinze          A.Heinze
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW06  ARCTIC         23:58   05:00
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW06/R      20:15  05:47    0   3.7   0    0   5.0  0.8   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: M.Croom
Support from Russet on TUI.
ARCTIC shutter had to be reset (observer's truss flats were unexpectedly saturated).
No other instrument issues tonight.
Nearby radar delayed our opening. The storm systems were essentially stationary, but they dissipated near midnight. Pollen counts were elevated, with readings over 200 in the late afternoon. The pollen event diminished also around midnight, and we were able to open and remain open for the remainder of the night. Science ended a few minutes past 12-degree twilight.
No telescope issues 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
--------------------------------------------------------------------------
 00:20 arctic    38( 1142)  -5  30  13.9 14.5 15.3 14.3 14.1   CUVR 5in  2.25
 00:54 arctic   234( 1326) -58  34  14.6 14.3 15.0 14.3 14.4   CUVR 5in  1.34
 02:25 arctic   283( 1332)  52  21  13.1 13.1 13.8 13.0 12.9   CUVR 5in  2.01
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    65    32     10   265    (W)   2391   cloudy     none
     17:00    73    33     11   232   (SW)   2274   cloudy     none
     18:00    62    32     10   136   (SE)   2165 mstly cldy   none
     19:00    62    32     16   152  (SSE)   2152 mstly cldy   none
     20:00    60    32     10   148  (SSE)   2081 mstly cldy   none
     21:00    58    31      6   147  (SSE)   1968 mstly cldy   none
     22:00    58    31     16   136   (SE)   2235 mstly cldy   none
     23:00    57    29     15   142   (SE)   2535  ptly cldy   none
     00:00    56    30      1   171    (S)   2281    clear     none
     01:00    58    29     15   192  (SSW)   2748 mstly clr    none
     02:00    56    27     15   197  (SSW)   2465    clear     none
     03:00    55    28     15   189    (S)   2524    clear     none
     04:00    55    21     11   195  (SSW)   2010 mstly clr    none
     05:00    55    17      7   237  (WSW)   2208    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