Subject: 3.5m Night Log 20250118
From: dembicky@apo.nmsu.edu
Date: Sun, 19 Jan 2025 14:09:28 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, January 18, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
OU01  G.Jewett          G.Jewett
CU06  Y.Notsu           Y.Notsu
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU01  KOSMOS         20:15   21:36
OU01  ARCTIC         21:36   00:04
CU06  ARCTIC         00:07   06:48
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU01/R      17:32  00:10    0   2.7   0    0   1.9  2.0   0    0
CU06/R      00:10  06:56    0    0    0    0   0.0  6.8   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
Dust kept us closed at the start of the night.
When I switched to ARCTIC the cold front was moving over us and seeing was kinda of yuck at 2.6 arc sec.
Temps got down to about -8.5C at the end of the night, with no stuck ARCTIC shutter issues.
No telescope issues 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
--------------------------------------------------------------------------
 20:32 kosmos   232(  432) 162  68  -3.5 -2.0 -2.1 -3.1 -3.5   --  1.94
 22:08 arctic   247(  416) 201  68  -5.2 -4.8 -4.1 -5.1 -5.1   BG40  2.60
 00:11 arctic   232(  327) -16  54  -5.8 -6.6 -5.8 -6.8 -6.5   4170  2.10
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    33     9     16   235   (SW)    823    clear     none
     17:00    30     9     17   258  (WSW)   1862    clear     dust
     18:00    28     9     17   247  (WSW)  14258    clear     dust
     19:00    29     8     15   282  (WNW)  15073    clear     dust
     20:00    27     2      5   316   (NW)   3972    clear     none
     21:00    24    -3     21    30  (NNE)    884    clear     none
     22:00    23    -4     11    13  (NNE)    684    clear     none
     23:00    21    -5      7    20  (NNE)    723    clear     none
     00:00    20    -8     15   353    (N)    728    clear     none
     01:00    20   -11     12   318   (NW)    706    clear     none
     02:00    19   -12     17     5    (N)    690    clear     none
     03:00    20   -11      9     5    (N)    439    clear     none
     04:00    19   -11     15     5    (N)    429    clear     none
     05:00    19    -9      7   348  (NNW)    361    clear     none
     06:00    18    -9     14   351    (N)    383 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.
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