Subject: 3.5m Night Log 20240811
From: mcmillan@apo.nmsu.edu
Date: Mon, 12 Aug 2024 12:10:21 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, August 11, 2024
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
OU01  G.Jewett          A.Moss
UW06  C.Chandler        C.Chandler
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU01  ARCTIC         20:10   21:10
UW06  ARCTIC         01:50   03:50
UW06  ARCTIC         05:00   05:35
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU01/R      20:00  01:10   1.6  2.6   0    0   0.0  1.0   0    0
UW06/R      01:10  06:17   1.2   0    0    0   3.9  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland, R.McMillan
We had some rain before sunset, but the clouds and radar cleared up enough for twilight sky flats... and then came back before we could get properly focused.  There was no more measurable rain after that, but radar was too close to risk it for a while.  We were able to open for part of second half, closed for a dust spike, and then re-opened with defensive fan settings when the dust came back down again.
There was a nice red aurora peeking over the northern horizon for half the night.  I couldn't see it with my eyes, but my phone agreed with the all-sky camera that it was mostly Halpha.
                    ------- 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
--------------------------------------------------------------------------
 02:02 arctic   284( 1553) -39  33  17.4 17.9 18.4 17.9 17.4   CUVR  1.17
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    71    44      7   339  (NNW)   1224 mstly cldy   none
     17:00    66    47     10    98    (E)   1418  ptly cldy   none
     18:00    68    45      8   121  (ESE)   1073  ptly cldy   rain
     19:00    69    40      6   111  (ESE)    901  ptly cldy   none
     20:00    68    41      7   122  (ESE)    977  ptly cldy   none
     21:00    68    40      7   182    (S)    985 mstly cldy   none
     22:00    68    39      7   177    (S)   1010 mstly cldy   none
     23:00    68    39     12   182    (S)   1110 mstly cldy   none
     00:00    63    44      9   118  (ESE)   1204 mstly cldy   none
     01:00    64    41     16   126   (SE)   1379  ptly cldy   none
     02:00    63    38     15   145   (SE)   1303  ptly cldy   none
     03:00    63    41      7   182    (S)   1526 mstly clr    none
     04:00    62    43      5   256  (WSW)   9199 mstly clr    dust
     05:00    64    40      7   293  (WNW)   3652 mstly clr    none
     06:00    64    40      3   341  (NNW)   1696    clear     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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