Subject: 3.5m Night Log 20250918
From: ajt@apo.nmsu.edu
Date: Fri, 19 Sep 2025 14:15:44 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, September 18, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
OU03  G.Garcia          G.Garcia,M.Kilic,G.Jewett,C.Ingebretsen,C.Lisse
WY01  M.Moe             C.Smith,M.Moe
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU03  ARCTIC         00:10   01:11
WY01  ECHELLE        01:14   04:04
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU03/R      19:13  01:10   5.0   0    0    0   1.0  0.0   0    0
WY01/R      01:10  06:41   0.6  2.1   0    0   2.9  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
All-sky camera and dataq power cycled at start of night.
Motion error at about 73 alt slewing down on very first test slew at start of night.
Rain in the evening, then nearby storms and thick clouds overhead that kept us closed until about midnight. We got on sky and had mixed results trying to get photons through the clouds until about 04:00 when we closed up due to the next line of storms coming through.
                    ------- 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
--------------------------------------------------------------------------
 00:18 arctic   488( 1260)  35  47  11.1 12.0 13.1 11.8 11.6   BG40_A1  1.56
 01:48 ecamera    395(   45) -25  53  11.6 11.6 12.2 11.6 11.7   Clear  1.27
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    54    46     14   121  (ESE)        mstly cldy   none
     17:00    55    44     11   112  (ESE)    440   cloudy   lt rain
     18:00    54    43     12    85    (E)    369   cloudy     none
     19:00    52    47     12    81    (E)          cloudy   lt rain
     20:00    53    45      9    90    (E)          cloudy     none
     21:00    53    44     12    79    (E)          cloudy     none
     22:00    54    40     10   122  (ESE)    400   cloudy     none
     23:00    54    40     14   131   (SE)    356  ptly cldy   none
     00:00    53    41     15   120  (ESE)    489  ptly cldy   none
     01:00    53    40     13   127   (SE)    339  ptly cldy   none
     02:00    53    41     10   136   (SE)    139  ptly cldy   none
     03:00    51    43     13   158  (SSE)         ptly cldy   none
     04:00    52    44      8   184    (S)         ptly cldy   none
     05:00    52    45      9   189    (S)         ptly cldy   none
     06:00    51    45      9   183    (S)         ptly 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  ----------
Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 3.1.8