Subject: 3.5m Night Log 20251206
From: ajt@apo.nmsu.edu
Date: Sun,  7 Dec 2025 14:34:46 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, December 06, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
GS02  D.Gies            D.Gies&Class
JH02  M.MacGregor       L.TovarMendoza,C.Gray
UW10  C.Chandler        M.Frissell,C.Chandler
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
GS02  EYEPIECE       17:10   18:00
GS02  ECHELLE        18:12   00:06
JH02  NICFPS         00:10   02:14
UW10  ARCTIC         02:29   06:07
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
GS02/O      17:06  00:10    0    0    0    0   1.7  5.4   0    0
JH02/R      00:10  02:20    0    0    0    0   0.0  2.2   0    0
UW10/R      02:20  06:44    0    0    0    0   0.0  4.4   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
We started off the night with an hour of eyepiece and very good seeing! Things were clear almost all night though we had a little bit of elevated wind and humidity, neither of those were high enough we had to close.
Eyepiece focus at 539 at start of night.
ThArcomp exposure during morning IOL measurement shows faint ThAr lines again; after doing some inconclusive testing the ThAr exposures looks normal again.
                    ------- 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
--------------------------------------------------------------------------
 18:19 ecamera    497( -210) 250  51   4.9  4.0  4.2  3.8  4.2   ND3  1.08
 00:15 NICFPS     578( 1126)   8  51   1.4  0.9  2.0  1.2  1.4   MK-H  0.88
 02:44 arctic   441(  636)  91  65   0.2 -0.1  0.7 -0.1 -0.1   SDSS_r  1.48
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    39    15     13   313   (NW)     83    clear     none
     17:00    39    14     14   295  (WNW)     89    clear     none
     18:00    40    16     10   265    (W)     70    clear     none
     19:00    41    17     11   250  (WSW)     78    clear     none
     20:00    39    18     17   292  (WNW)    257    clear     none
     21:00    38    18     14   292  (WNW)    340    clear     none
     22:00    36    19     13   311   (NW)    312 mstly clr    none
     23:00    36    22     14   328  (NNW)    231    clear     none
     00:00    35    22     10   336  (NNW)    217    clear     none
     01:00    33    22      4   305   (NW)    276    clear     none
     02:00    32    23      9   311   (NW)           clear     none
     03:00    32    24     22   358    (N)           clear     none
     04:00    31    24     16    33  (NNE)           clear     none
     05:00    30    20     15   356    (N)           clear     none
     06:00    29    12     20     7    (N)    296    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.
              ----------  TELESCOPE SOFTWARE  ----------
Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 3.1.8