Subject: 3.5m Night Log 20251022
From: dembicky@apo.nmsu.edu
Date: Thu, 23 Oct 2025 12:03:47 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, October 22, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
OU03  G.Jewett          G.Jewett
UW05  C.Chandler        C.Chandler, M.Frissell
GS04  S.Lepine          Z.Way
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU03  ARCTIC         --:--   --:--
UW05  ARCTIC         02:10   02:50
GS04  ECHELLE        --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU03/R     18:30  01:10   6.3  0.4   0    0   0.0  0.0   0    0
UW05/R     01:10  03:50   2.0   0    0    0   0.7  0.0   0    0
GS04/R     03:50  07:05   3.2   0    0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
Clouds and a little rain kept us closed for the first half of the night.  We opened a little after 2AM.
Clouds came back around 02:30 and we needed to close at 02:50 as radar returns were getting close.  We had light rain at around 03:30.
No telescope problems.
                    ------- 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
--------------------------------------------------------------------------
 02:19 arctic   231( 1019)  56  41  12.6 12.2 13.6 12.1 12.5   CUVR  1.07
 02:20 NA2gdr 36556(36556)  56  41  12.9 12.2 13.6 12.1 12.5   clear  1.13
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    58    26      5   302  (WNW)    698   cloudy     none
     17:00    57    26      6   315   (NW)    199   cloudy   lt rain
     18:00    56    30      9   307   (NW)    226 mstly cldy   none
     19:00    54    29      7   358    (N)    302   cloudy   lt rain
     20:00    54    33     10   317   (NW)    255   cloudy     none
     21:00    53    33      8     1    (N)    317   cloudy     none
     22:00    51    33     19   294  (WNW)    350   cloudy     none
     23:00    53    33     10   271    (W)    288   cloudy     none
     00:00    53    33      9   291  (WNW)    446   cloudy     none
     01:00    54    32      9   264    (W)    472  ptly cldy   none
     02:00    54    27     13   189    (S)    308  ptly cldy   none
     03:00    56    24     20   197  (SSW)    479   cloudy   lt rain
     04:00    55    27     12   189    (S)    407   cloudy   lt rain
     05:00    46    32     11   354    (N)    528   cloudy     none
     06:00    47    32      3   156  (SSE)    778   cloudy     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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