Subject: 3.5m Night Log 20251004
From: tmcquaid@apo.nmsu.edu
Date: Sun,  5 Oct 2025 12:55:04 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, October 04, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
WY02  M.Moe             M.Moe
UW04  S.Hawley          S.Hawley,L.Hebb
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY02  ECHELLE        --      --
UW04  ECHELLE        03:34   06:23
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY02/R      18:52  01:10    0  6.3   0    0   0.0  0.0   0    0
UW04/R      01:10  06:52    0  2.4   0    0   1.6  1.7   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.McQuaid
Dome stayed closed at the beginning of the night due to thick cloud cover overhead and clouds coming in from the west.
Light rain showers starting at 20:30
Cloud cover improved, so we opened dome at 03:27 and started on sky at 03:34.
                    ------- 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
--------------------------------------------------------------------------
 03:46 ecamera    411(   52)  20  62  10.9 11.5 13.1 11.3 10.9   ND1  1.23
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    62    44     23   218   (SW)    766  ptly cldy   none
     17:00    59    44     13   210  (SSW)    847  ptly cldy   none
     18:00    58    43     22   215   (SW)   1044  ptly cldy   none
     19:00    56    43     20   207  (SSW)    874 mstly cldy   none
     20:00    56    43     14   194  (SSW)    848   cloudy   lt rain
     21:00    53    45     16   205  (SSW)          cloudy   lt rain
     22:00    55    43     15   222   (SW)   1135   cloudy     none
     23:00    55    40     15   255  (WSW)    763   cloudy     none
     00:00    54    37     11   258  (WSW)    853   cloudy     none
     01:00    53    36     10   258  (WSW)    694 mstly cldy   none
     02:00    53    35     10   249  (WSW)    552 mstly cldy   none
     03:00    52    35     13   250  (WSW)    745  ptly cldy   none
     04:00    51    34     11   263    (W)    679  ptly cldy   none
     05:00    51    35      9   229   (SW)    683  ptly cldy   none
     06:00    50    35     11   216   (SW)    737 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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