Subject: 3.5m Night Log 20250503
From: dembicky@apo.nmsu.edu
Date: Sun,  4 May 2025 11:28:38 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, May 03, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
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BY02  S.Turner          S.Turner, D.Stephens
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
BY02  NICFPS         19:55   22:35
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
BY02/R      19:55  06:04   3.8  3.6   0    0   0.0  2.7   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
At 19:49 local time we had a earthquake.  Not sure how large it was but the USGS report is a 5.3 mag earthquake located 57KM S of White City NM at this same time.  I was up in the enclosure at the time it occurred and I felt the building shake (similiar to a wind gust rocking the building) and a few seconds later a larger shake that rattled the 180L LN2 dewars back and forth several seconds.
I closed at 22:35 due to approaching thunderstorm.  It looked like the storm was going to move out after about 01:00 but the clouds lingered all night long with radar returns around us.  We finally gave up at 05:00.
                    ------- FAILURE LOG -------
              FAILURE MODE     TIME
PROG   INSTR     TI/SHU    START  FINISH  DESCRIPTION
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            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
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 20:47 NICFPS     686( 1863) 104  69   7.0  8.1  8.7  7.3  7.1   MK-J  1.37
 20:48 NA2gdr 49187(49187) 104  69   7.0  8.0  8.6  7.2  7.1   clear  2.15
 22:17 NICFPS     420( 1513) 205  49   5.6  6.1  6.8  5.6  5.6   MK-J  2.05
 22:18 NA2gdr 50266(50266) 205  49   5.6  6.1  6.8  5.6  5.6   clear  2.65
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    57    30     16   197  (SSW)   1440  ptly cldy   none
     17:00    57    27     18   204  (SSW)   1744 mstly clr    none
     18:00    53    25     12   201  (SSW)   1880 mstly clr    none
     19:00    51    22     13   145   (SE)   2246 mstly clr    none
     20:00    46    31     17    86    (E)   1218  ptly cldy   none
     21:00    44    30     23    76  (ENE)   1518  ptly cldy   none
     22:00    42    30     18    88    (E)   1599  ptly cldy   none
     23:00    42    30     14    91    (E)   1729   cloudy     dust
     00:00    41    33     15   224   (SW)          cloudy     none
     01:00    38    33     23   102  (ESE)         ptly cldy  humid
     02:00    40    32     10    71  (ENE)        mstly cldy   none
     03:00    42    32      8    93    (E)        mstly cldy   none
     04:00    40    33     13   118  (ESE)        mstly cldy   none
     05:00    43    32     21   127   (SE)   2543 mstly cldy   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.
              ----------  TELESCOPE SOFTWARE  ----------
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Current TUI version: 3.1.8