Subject: 3.5m Night Log 20251119
From: tsutherland@apo.nmsu.edu
Date: Thu, 20 Nov 2025 11:53:38 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, November 19, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
WY02  M.Moe             C.Smith
NM05  K.Sanderson       K.Sanderson
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY02  ECHELLE        19:21   19:53
NM05  KOSMOS         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY02/R      17:09  00:10    6.5    0    0    0   0.5  0.0   0    0
NM05/R      00:10  06:30   6.3    0    0    0   0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland
Opened at 19:15.
We had a good clear spot for a little while at the start of the night, but by the time I felt comfortable opening, we only got 30 minutes on sky before radar got too close.
Kosmos internal cals looked wrong, see PR 2266.
Weathered out for the majority of the night. Gave up at 4am.
                    ------- 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
--------------------------------------------------------------------------
 19:27 ecamera    526( -187)   1  54   3.9  3.9  5.4  4.0  3.8   1.80  1.00
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    40    32     15   186    (S)          cloudy     none
     17:00    39    32     13   188    (S)         ptly cldy   none
     18:00    39    32     17   179    (S)        mstly clr    none
     19:00    40    32     15   155  (SSE)        mstly clr    none
     20:00    39    32     19   180    (S)         ptly cldy   none
     21:00    41    32     16   185    (S)        mstly cldy   rain
     22:00    36    32     21   145   (SE)          cloudy     rain
     23:00    37    32     19   204  (SSW)          cloudy     rain
     00:00    37    31     27   195  (SSW)          cloudy     rain
     01:00    37    32     21   194  (SSW)          cloudy     rain
     02:00    36    21     27   190    (S)          cloudy     rain
     03:00    36    31     13   207  (SSW)          cloudy     rain
     04:00    35    28     33   200  (SSW)          cloudy     rain
     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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