Subject: 3.5m Night Log 20250718
From: cgray@apo.nmsu.edu
Date: Sat, 19 Jul 2025 11:26:45 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, July 18, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
CU01  A.Kowalski        J.Libby-Roberts
OU01  G.Jewett          A.Moss
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU01  ARCTIC         --:--   --:--
OU01  kosmos         04:02   05:09
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU01/R      20:19  02:20   4.6  1.4   0    0    0    0    0    0
OU01/R      02:20  06:00    0   2.6   0    0   0.0  1.1   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
The night started with thunderstorms. GLORIOUS THUNDERSTORMS!! The lightning was insane! I honestly didn't think we would open all night. But the clouds cleared around 2am and, somehow...the humidity didn't ultra spike, just kinda spike. We were able to open around 4am! Seeing was even good! Sadly, we only were able to observe an hour before twilight hit and the dust counts went over the limit
Dataq needed a restart.
Mirror covers needed a restart at the beginning of the night but, interestingly, not at the end. There were some power flickers so I'm surprised everything was well behaved.
Telescope parked at 83 alt.
                    ------- 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
--------------------------------------------------------------------------
 04:17 kosmos   303( 1071) -43  42  14.0 13.9 14.2 13.8 13.6   --  1.60
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    74    49     13   203  (SSW)    704   cloudy     none
     17:00    63    51     13   100    (E)   1221   cloudy   lt rain
     18:00    62    52     12    84    (E)   1378   cloudy   lt rain
     19:00    60    52      9    92    (E)          cloudy   lt rain
     20:00    62    49     22   125   (SE)   1113 mstly cldy   none
     21:00    61    50     12   126   (SE)   1154  ptly cldy lt rain
     22:00    59    51     12   122  (ESE)         ptly cldy   none
     23:00    60    52     12   145   (SE)          cloudy     rain
     00:00    57    53     12   184    (S)          cloudy   lt rain
     01:00    55    51      6   263    (W)          cloudy   lt rain
     02:00    55    49      7   336  (NNW)        mstly clr    none
     03:00    56    48      5   260    (W)           clear     none
     04:00    57    49      8   265    (W)           clear     none
     05:00    58    44      6   263    (W)   3486    clear     dust
     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