Subject: 3.5m Night Log 20251023
From: dembicky@apo.nmsu.edu
Date: Fri, 24 Oct 2025 12:03:27 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, October 23, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
SU01  J.Hughes          J.Hughes
UW03  C.Chandler        C.Chandler, D.Singh
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
SU01  ARCTIC         --:--   --:--
UW03  ARCTIC         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
SU01/R     18:29  01:10   5.7  1.0   0    0   0.0  0.0   0    0
UW03/R     01:10  07:06   5.9   0    0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
Clouds to start the first half, then a partial clearing around 20:00, but I was hesitant to open since it looked like a possible sucker hole, so I waited 15 minutes.  Sure enough in about 15 mins clouds started to form and by 20:30 we were cloud covered.  The clouds remained for the remainder of the night.
                    ------- 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    56    39     20   223   (SW)    860   cloudy     none
     17:00    53    38     14   221   (SW)    808   cloudy     none
     18:00    52    37     13   209  (SSW)   1205   cloudy     none
     19:00    51    36     19   206  (SSW)   1482   cloudy     none
     20:00    52    38     27   225   (SW)   1153 mstly cldy   none
     21:00    51    38     18   232   (SW)   1107   cloudy     none
     22:00    50    38      9   232   (SW)    973   cloudy     none
     23:00    50    37     11   237  (WSW)   1010   cloudy     none
     00:00    50    37     10   221   (SW)    994   cloudy     none
     01:00    49    32     13   264    (W)    738   cloudy     none
     02:00    49    31      7   263    (W)    733   cloudy     none
     03:00    48    28     11   271    (W)    767   cloudy     none
     04:00    47    26     13   292  (WNW)    639 mstly cldy   none
     05:00    46    24     11   264    (W)    561 mstly cldy   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