Subject: 3.5m Night Log 20210109
From: decolib@apo.nmsu.edu
Date: Sun, 10 Jan 2021 13:15:38 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, January 09, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
CU05  H.Roberts         H.Roberts
NM07  M.Prescott        M.Prescott
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU05  DIS            20:38   21:18
NM07  DIS            --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU05/R      17:24  00:10    6.1  0    0    0   0.7  0.0   0    0
NM07/R      00:10  06:58    4.4  2.4  0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: D.DeColibus
We attempted to open briefly at sunset, but were quickly stymied by a thick bank of clouds which the radar suggested had potential for snowfall. As we never even managed to get focused before closing, I elected not to mark the time at sunset as used for CU05.
We attempted to open again around 20:40 as the clouds cleared, but high dust and rising humidity forced us closed again by 21:20. It started to snow around 01:20. We did not open at all during B half.
Parked the dome facing south, but there's less than 0.25" of snow onsite.
                    ------- 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
--------------------------------------------------------------------------
 20:45 dcamera    336(  109) 230  24  -4.9 -0.6  0.8 -1.2 -3.7   --  2.54
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    35     9     20   194  (SSW)    832 mstly clr    none
     17:00    32    11     16   213  (SSW)    806  ptly cldy   none
     18:00    30    11     16   233   (SW)    944 mstly cldy   none
     19:00    31     9     25   225   (SW)    839 mstly cldy   none
     20:00    25    14     13   233   (SW)   3956 mstly clr    dust
     21:00    22    15      5   244  (WSW)   3903 mstly clr   humid
     22:00    20    15      7   174    (S)        mstly clr   humid
     23:00    19    15      1   206  (SSW)        mstly clr   humid
     00:00    16    14      2   136   (SE)        mstly clr   humid
     01:00    17    14      4   171    (S)          cloudy   lt snow
     02:00    15    13     13    77  (ENE)          cloudy   lt snow
     03:00    14    12     11    79    (E)          cloudy   lt snow
     04:00    14    12     14    84    (E)          cloudy   lt snow
     05:00    14    12     15    77  (ENE)          cloudy   lt snow
     06:00    13    11     17    57  (ENE)          cloudy   lt snow
     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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