Subject: 3.5m Night Log 20211120
From: dembicky@apo.nmsu.edu
Date: Sun, 21 Nov 2021 13:14:26 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, November 20, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
JH01  N.Allen           N.Allen, Z.Rustamkulov
UV02  A.Verbiscer       A.Verbiscer
UW09  B.Morris          B.Morris, S.Hawley
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
JH01  KOSMOS         17:08   21:05
UV02  ARCTIC         21:25   22:00
UV02  ARCTIC         00:15   02:04
UW09  ECHELLE        02:10   05:52
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
JH01/R      17:08  21:30    0    0    0    0   0.8  3.6   0    0
UV02/R      21:30  02:10   1.3   0    0    0   0.0  3.4   0    0
UW09/R      02:10  06:31    0    0    0    0   0.0  4.3   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
First observers finished a few minutes early as their target was getting to too high an airmass to get anything more useful.
Around 21:15 the clouds started to get worse, this made observations difficult.  By 22:00 the clouds were thick enough that their brightest target wasn't really observable anymore.  We stayed open in case we were able to get a hole.  Around 00:15 we were able to collect some photons on the brightest target but we still had plenty of clouds to make thing challenging.
The UW program had bright enough targets, and some thinning of the clouds during their time.  It got pretty cloudy once again during twilight.
                    ------- 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
--------------------------------------------------------------------------
 18:46 kosmos   306(  668)  36  46   6.6  7.5  7.7  7.3  6.7   --  1.70
 22:35 arctic   455( 1008) 134  47   7.0  6.2  6.8  6.4  6.4   SDSS_r  0.85
 03:13 ecamera    402( -191) -155  67   7.0  5.5  5.9  5.5  6.0   clear  1.00
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    46    24     17   257  (WSW)   1654 mstly cldy   none
     17:00    44    24     15   251  (WSW)   1686  ptly cldy   none
     18:00    44    24     18   248  (WSW)   1758  ptly cldy   none
     19:00    45    24     14   263    (W)   1517  ptly cldy   none
     20:00    45    23     16   264    (W)   1478 mstly cldy   none
     21:00    45    24     20   265    (W)   1680 mstly cldy   none
     22:00    44    24     15   264    (W)   1652   cloudy     none
     23:00    44    21     22   289  (WNW)   1350   cloudy     none
     00:00    44    17     18   293  (WNW)    946   cloudy     none
     01:00    43    17     15   317   (NW)   1105   cloudy     none
     02:00    44    16      6   334  (NNW)   1137   cloudy     none
     03:00    44    12      5   288  (WNW)    888 mstly cldy   none
     04:00    44    11     11   359    (N)    952 mstly cldy   none
     05:00    44    11     11   357    (N)    865 mstly cldy   none
     06:00    44    12     12    57  (ENE)    938   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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