Subject: 3.5m Night Log 20250201
From: cgray@apo.nmsu.edu
Date: Sun,  2 Feb 2025 13:31:02 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, February 01, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
AP02  S.Merkowitz       R.McMillan
WY02  M.Moe             M.Moe
OU03  G.Garcia          G.Garcia
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AP02  APOLLO         17:45   18:39
WY02  KOSMOS         18:43   00:08
OU03  KOSMOS         00:08   06:08
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
AP02/R      17:45  18:45    0    0    0    0   0.0  1.0   0    0
WY02/R      18:45  00:10    0    0    0    0   2.8  2.7   0    0
OU03/R      00:10  06:49    0    0    0    0   6.6  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
The night started with some light clouds that weren't an issue as well as moderate seeing.  I thought things were good, but then we had some orographicc clouds forming over us during B half it was making it impossible to see faint targets. Thankfully, they cleared enough to catch a few of the brighter ones.
The echelle seemed a little low at dawn (239) and it was filled to 282 in the afternoon. I went ahead and gave it 20 lbs of LN2 "just in case..."
                    ------- 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
--------------------------------------------------------------------------
 19:38 kosmos   260(  742) -31  51   4.7  3.7  4.1  3.4  3.8   --  1.19
 22:44 kosmos   310(  786)  95  64   5.0  3.8  4.4  3.8  4.0   --  1.44
 07:27 kosmos   360(  938) 104  80   6.8  6.0  6.5  6.1  6.1   --  1.23
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    43    -8     13   268    (W)    391 mstly clr    none
     17:00    40    -7      9   270    (W)    535 mstly clr    none
     18:00    40    -7     11   276    (W)    493 mstly clr    none
     19:00    39    -4      9   290  (WNW)    583 mstly clr    none
     20:00    41     1      2   344  (NNW)    494 mstly clr    none
     21:00    41    -1      4    17  (NNE)    523 mstly clr    none
     22:00    41    -4      8   340  (NNW)    402 mstly clr    none
     23:00    42    -1     15   310   (NW)    419 mstly clr    none
     00:00    43     2     16   309   (NW)    284 mstly clr    none
     01:00    43     1     10   294  (WNW)    309 mstly clr    none
     02:00    44     1     14   306   (NW)    265  ptly cldy   none
     03:00    44     5     12   338  (NNW)    294  ptly cldy   none
     04:00    44    14      7   345  (NNW)    306  ptly cldy   none
     05:00    44    14     13    13  (NNE)    263 mstly clr    none
     06:00    44    19     11   359    (N)    241 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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