Subject: 3.5m Night Log 20250810
From: dembicky@apo.nmsu.edu
Date: Mon, 11 Aug 2025 11:25:26 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, August 10, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
CU01  A.Kowalski        J.Libby-Roberts
UW03  P.Yoachim         Z.Xu, Z.Liu
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU01  ARCTIC         --:--   --:--
UW03  KOSMOS         02:45   05:14
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU01/R      20:02  02:45   0.9  5.9   0    0   0.0  0.0   0    0
UW03/R      02:45  06:16    0    0    0    0   0.0  3.5   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
Clouds during first half of the night.
I needed to restart the ALCOR all sky camera tonight.
My first half observers gave up at 02:00 as the eclipse ended but this time.  I was
finally able to open around 02:40.
Altitude Motion error @ 09:28:53UT, 56.7 deg going downward
Other than some pesky clouds during 2nd half no problems after we were able to open.
                    ------- 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
--------------------------------------------------------------------------
 03:15 kosmos   175(  947) -87  68  13.8 14.4 16.9 14.3 13.8   --  1.16
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    65    45     16    76  (ENE)   1278   cloudy   lt rain
     17:00    60    47     16    76  (ENE)   1174   cloudy   lt rain
     18:00    59    43     22    55   (NE)   1221   cloudy   lt rain
     19:00    61    42     17    59  (ENE)   1029   cloudy     none
     20:00    62    42      7   183    (S)   1210   cloudy     none
     21:00    59    43     10   120  (ESE)    992   cloudy     none
     22:00    61    41     10   132   (SE)    812   cloudy     none
     23:00    59    41     10   123  (ESE)    500   cloudy     none
     00:00    60    40      9   126   (SE)    904   cloudy     none
     01:00    59    40     11   180    (S)    859   cloudy     none
     02:00    57    42      9   172    (S)    756 mstly cldy   none
     03:00    58    41     20   194  (SSW)    827  ptly cldy   none
     04:00    56    44     20   193  (SSW)   1081  ptly cldy   none
     05:00    54    46     13   185    (S)         ptly 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.
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