Subject: 3.5m Night Log 20250921
From: tsutherland@apo.nmsu.edu
Date: Mon, 22 Sep 2025 11:30:06 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, September 21, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
JH02  C.Ingebretsen     C.Ingebretsen
UV01  A.Verbiscer       A.Verbiscer
GS04  S.Lepine          E.Galligan,C.Gray
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
JH02  ARCTIC         19:09   21:09
UV01  ARCTIC         21:09   22:59
GS04  ECHELLE        --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
JH02/R      19:09  21:09    0    0    0    0   2.0  0.0   0    0
UV01/R      21:09  01:10   2.2   0    0    0   1.8  0.0   0    0
GS04/R      01:10  06:43   5.6   0    0    0    0   0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland
USB restart of alcor at the start of the night.
Motion error at 73.6deg alt slewing downwards at 7:45pm.
Closed at 11pm due to nearby radar returns. We never got precip here, but the returns were right on the county line for most of then night. We never reopened, and gave up at 5am.
                    ------- 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
--------------------------------------------------------------------------
 19:44 arctic   484( 1477) 103  80  15.0 17.1 16.5 17.2 14.3   SDSS_r  0.89
 21:19 arctic   325( 1262)  -1  37  15.1 15.3 15.4 15.3 14.7   SDSS_r  1.00
  ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    62    34      7   269    (W)    250    clear     none
     17:00    63    37      2   210  (SSW)    262    clear     none
     18:00    63    35      1   215   (SW)    239    clear     none
     19:00    60    33      2     6    (N)    226    clear     none
     20:00    59    32      1   269    (W)    233    clear     none
     21:00    58    35      3   196  (SSW)    269    clear     none
     22:00    60    34      6   229   (SW)    274 mstly clr    none
     23:00    59    33      3   199  (SSW)    269  ptly cldy   none
     00:00    59    35      7   184    (S)    233 mstly clr    none
     01:00    58    36      9   193  (SSW)    226 mstly clr    none
     02:00    57    38     12   185    (S)    266 mstly clr    none
     03:00    57    42     10   156  (SSE)    290 mstly clr    none
     04:00    55    43      6   207  (SSW)    328 mstly clr    none
     05:00    57    43      5   209  (SSW)    287 mstly clr    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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