Subject: 3.5m Night Log 20250826
From: dembicky@apo.nmsu.edu
Date: Wed, 27 Aug 2025 11:04:29 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, August 26, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
CU02  Y.Notsu           Y.Notsu
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU02  ARCTIC         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU02/R      19:44  06:26  9.1  1.7   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
I had a motion error on alt after I did an axis init but before I did a slew.
We were open at Sunset but we had some nearby threatening weather just off to our west.  I was keeping a close eye on it and my observer was able to get their sky flats. I just started to try focusing and in came the clouds.  I closed the enclosure as the system held rain.
Dataq was frozen so I restarted it.
Clouds the remainder of the night.  We had light rain on several occasions tonight as well.
                    ------- 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
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               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    66    47     13   153  (SSE)    858  ptly cldy   none
     17:00    63    49     14   125   (SE)   1044  ptly cldy   none
     18:00    63    47     14   112  (ESE)   1014  ptly cldy   none
     19:00    61    45     20   120  (ESE)   1055  ptly cldy   none
     20:00    60    44     17   131   (SE)   1516 mstly cldy   none
     21:00    59    44     16   117  (ESE)   1401   cloudy   lt rain
     22:00    55    48      5   163  (SSE)          cloudy   lt rain
     23:00    55    49     14   149  (SSE)          cloudy     none
     00:00    56    47     15   139   (SE)          cloudy     none
     01:00    55    51      8   203  (SSW)          cloudy    humid
     02:00    53    49     17   138   (SE)          cloudy    humid
     03:00    51    49     15   134   (SE)          cloudy    humid
     04:00    50    50     21   145   (SE)          cloudy   lt rain
     05:00    51    51     16   139   (SE)          cloudy   lt rain
     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.
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