Subject: 3.5m Night Log 20251012
From: ajt@apo.nmsu.edu
Date: Mon, 13 Oct 2025 12:33:02 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, October 12, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW01  S.Hawley          L.Hebb
BY05  E.Hintz           S.Call
OU03  G.Jewett          G.Jewett
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW01  ARCTIC         --:--   --:--
BY05  TSPEC          --:--   --:--
OU03  ARCTIC         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW01/R      18:42  21:56   3.2   0    0    0   0.0  0.0   0    0
BY05/R      21:56  01:10   1.3  2.0   0    0   0.0  0.0   0    0
OU03/R      01:10  06:58    0   5.8   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
The night started with dense fog that turned into overcast skies and high humidity. While the clouds did clear up for a bit we were still getting high humidity and intermittent fog. (Weather log has incorrectly reported dewpoint and dust counts). We did not 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
--------------------------------------------------------------------------
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    49    50      8   216   (SW)          cloudy     fog
     17:00    49    49      6   200  (SSW)          cloudy     fog
     18:00    49    32      7   194  (SSW)  68283   cloudy     fog
     19:00    48    32      7   192  (SSW)    397   cloudy     fog
     20:00    48    31      7   191    (S)  87885   cloudy    humid
     21:00    47    32     12   186    (S)    504   cloudy    humid
     22:00    46    31      1   204  (SSW)    816   cloudy    humid
     23:00    48    31      1   234   (SW)    397   cloudy    humid
     00:00    47    32      3   179    (S)    594 mstly cldy  humid
     01:00    46    31      8   190    (S)    480 mstly clr   humid
     02:00    47    31      1   239  (WSW)    369  ptly cldy  humid
     03:00    49    31      3   255  (WSW)    174  ptly cldy  humid
     04:00    46    31      3   241  (WSW)    154 mstly cldy  humid
     05:00    45    30      3   166  (SSE)   7270 mstly cldy   fog
     06:00    47    31      7   189    (S)    157   cloudy    humid
     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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