Subject: 3.5m Night Log 20250920
From: tsutherland@apo.nmsu.edu
Date: Sun, 21 Sep 2025 12:57:41 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, September 20, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
NM04  T.McQuaid         T.McQuaid
OU01  G.Jewett          G.Jewett,C.Ingebretsen
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM04  ECHELLE        19:11   01:06
OU01  Arctic         01:10   06:37
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM04/R      19:11  01:10    0    0    0    0   6.0  0.0   0    0
OU01/R      01:10  06:43    0    0    0    0   5.4  0.1   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland
Opened at 6:45pm to start venting. Started taking data around 7:30pm once it got dark enough.
Did a USB restart of the all sky at the start of the night.
Thin, but annoying clouds rolled in around 4am.
It was a beautiful night with nearly perfect weather, and no telescope or instrument problems
                    ------- 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
--------------------------------------------------------------------------
 19:34 ecamera    528(  382)  44  37  13.2 15.6 15.1 15.1 13.4   ND4  1.17
 20:35 ecamera    397(  178)  18  58  13.1 14.4 14.3 13.8 13.1   clear  0.91
 01:17 arctic   426( 1220)  11  53  13.0 12.5 13.2 12.4 13.0   BG40  0.87
 05:04 arctic   379( 1144) -94  52  12.7 11.9 12.6 11.8 11.9   SDSS_r  0.95
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    60    43      6   308   (NW)    287 mstly clr    none
     17:00    61    38      7   302  (WNW)    254 mstly clr    none
     18:00    61    43     12   288  (WNW)    314 mstly clr    none
     19:00    58    45      5   260    (W)    295    clear     none
     20:00    56    44      7   311   (NW)    339    clear     none
     21:00    55    46      5   272    (W)    362    clear    humid
     22:00    57    44      1   232   (SW)    377    clear     none
     23:00    57    44      2   211  (SSW)    360    clear     none
     00:00    56    45      5   197  (SSW)    348    clear     none
     01:00    56    43      3   202  (SSW)    321    clear     none
     02:00    55    42      4   262    (W)    309    clear     none
     03:00    56    40      2   216   (SW)    275    clear     none
     04:00    55    44      2   232   (SW)    374  ptly cldy   none
     05:00    54    46      1   304   (NW)        mstly clr    none
     06:00    56    41      1   335  (NNW)    371 mstly clr    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  ----------
Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 3.1.8