Subject: 3.5m Night Log 20250417
From: dembicky@apo.nmsu.edu
Date: Fri, 18 Apr 2025 11:53:22 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, April 17, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
NM04  P.Holguin         P.Holguin, J.Burchett, A.Menchaca, T.McQuaid
AP02  S.Merkowitz       R.McMillan, T.Sutherland
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM04  KOSMOS         --:--   --:--
AP02  APOLLO         03:30   05:15
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM04/R      19:44  01:10   4.6  0.9   0    0   0.0  0.0   0    0
AP02/R      01:10  06:21    0   4.4   0    0   0.0  1.8   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
Dust and wind for most of the night.  Things finally improved and we were able to open around 03:30.
Apollo was having some issues and finished a little early.  We used the remainder of the time to do pointing checks with Echelle and Agile.  Pointing looked good for both.
Focus was a little negative but we had a rather warm primary compared to the outside temps.
Closed at 05:45 and parked telescope low for Pricilla to finish her tour in the morning as long as dust levels in the dome were below 3000 ctx she could open the mirror covers.
                    ------- 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
--------------------------------------------------------------------------
 03:41 APOLLO    -100( 1362)  75  37   5.7  7.7 10.0  7.5  6.4   --  2.00
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    61    22     33   268    (W)  73499 mstly cldy   dust
     17:00    61    19     27   264    (W)  83338 mstly cldy   dust
     18:00    59    19     41   216   (SW) 102608 mstly cldy   dust
     19:00    56    19     37   242  (WSW) 102251 mstly cldy   dust
     20:00    54    18     36   240  (WSW) 106369 mstly cldy   dust
     21:00    53    15     29   234   (SW)  80396 mstly cldy   dust
     22:00    52    19     33   225   (SW)  80767 mstly cldy   dust
     23:00    49    21     42   228   (SW)  63119 mstly cldy   dust
     00:00    48    13     31   232   (SW)  25602 mstly cldy   dust
     01:00    46    20     34   241  (WSW)  35489 mstly cldy   dust
     02:00    45    19     26   239  (WSW)  21031 mstly cldy   dust
     03:00    43    16     18   253  (WSW)   3868  ptly cldy   none
     04:00    42    14     22   247  (WSW)   2388  ptly cldy   none
     05:00    41    12     17   256  (WSW)   2069  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.
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