Subject: 3.5m Night Log 20251016
From: tsutherland@apo.nmsu.edu
Date: Fri, 17 Oct 2025 13:02:03 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, October 16, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
WY01  C.Kobulnicky      N.Patten
UW05  C.Chandler        C.Chandler,M.Frissell,D.Singh,N.Morato
NM04  A.Peck            A.Peck,A.Abbas
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY01  ECHELLE        18:37   01:00
UW05  ARCTIC         01:07   03:42
NM04  ECHELLE        03:46   07:01
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY01/R      18:37  01:10    0    0    0    0   6.6  0.0   0    0
UW05/R      01:10  03:50    0    0    0    0   2.4  0.3   0    0
NM04/R      03:50  07:01    0    0    0    0   0.0  3.2   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland
Restarted dataq this afternoon and this morning.
Motion error in alt going down at 34.9deg at 18:00.
Opened dome at 18:10 to start venting since the weather looked good.
Called it quits for the night at 06:42 since the sky got too bright.
Weather was astonishingly good tonight. Not a cloud in the sky all night and the humidity mostly kept at a reasonable level. We were open from dusk to dawn, and there were no telescope or instrument problems tonight.
                    ------- 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
--------------------------------------------------------------------------
 18:59 ecamera    432(  103) 108  50   9.8 11.9 12.3 11.2 10.0   ND2  1.37
 20:59 ecamera    491(   62) -117  24   9.4  9.4 10.1  9.1  9.2   clear  1.67
 01:23 arctic   374(  922)  87  63   7.8  7.4  8.1  7.3  7.4   CUVR  1.10
 03:51 ecamera    432( -125) -23  30   7.2  6.8  7.5  6.7  7.0   ND3  1.14
     ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    54    45     16   231   (SW)    582    clear     none
     17:00    57    43     18   253  (WSW)    546    clear     none
     18:00    54    37     13   268    (W)    452    clear     none
     19:00    50    28     18   249  (WSW)    408    clear     none
     20:00    49    32     15   265    (W)    534    clear     none
     21:00    49    34     11   263    (W)    634    clear     none
     22:00    49    35     13   260    (W)    618    clear     none
     23:00    49    34      8   265    (W)    698    clear     none
     00:00    48    36     10   268    (W)           clear     none
     01:00    46    36      9   285  (WNW)    767    clear     none
     02:00    46    37     11   274    (W)           clear     none
     03:00    45    37      9   269    (W)           clear    humid
     04:00    45    37     10   270    (W)           clear    humid
     05:00    44    37     12   286  (WNW)           clear    humid
     06:00    43    37     10   273    (W)           clear    humid
     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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Current HUB version: v20171231_01
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