Subject: 3.5m Night Log 20250727
From: dembicky@apo.nmsu.edu
Date: Mon, 28 Jul 2025 11:39:49 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, July 27, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW08  C.Chandler        C.Chandler , M.Frissell, J.Davenport
CU01  A.Kowalski        S.Kanodia, P.Premnath
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW08  KOSMOS         00:50   01:08
CU01  ARCTIC         01:22   05:18
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW08/R      20:14  01:10   2.8  1.9   0    0   0.3  0.0   0    0
CU01/R      01:10  06:06    0    0    0    0   4.9  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
Optical camera was working (and focused, thanks Cary) but seems to have stopped just before sunset tonight.
We delayed opening due to clouds and the threat of precipitation at sunset.
Motion error going down, first slew, at 66.3 alt
We finally opened at 00:50 once the humidity had dropped below closure levels.
No 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
--------------------------------------------------------------------------
 01:05 klow   449( 1233)  84  71  14.7 14.7 16.3 14.5 14.4   --  1.70
 01:27 arctic   452( 1322)  79  76  14.4 14.4 15.7 14.1 13.9   SDSS g  1.60
 01:34 NA2gdr 37090(37090)  77  77  14.4 14.3 15.6 14.1 14.1   Clear  1.80
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    63    48     14    80    (E)    960   cloudy   lt rain
     17:00    63    50     10    84    (E)   1235   cloudy   lt rain
     18:00    62    51     17    78  (ENE)   1280   cloudy     none
     19:00    63    51     20    76  (ENE)   1301   cloudy     none
     20:00    62    50     16    79    (E)   1360   cloudy     none
     21:00    61    50     23    71  (ENE)   1573   cloudy     none
     22:00    59    51     22    76  (ENE)        mstly cldy   none
     23:00    56    33     27    74  (ENE)   2555 mstly clr   humid
     00:00    56    32     26    76  (ENE)   2724 mstly clr   humid
     01:00    59    32     20    75  (ENE)   1927 mstly clr    none
     02:00    59    32      6   271    (W)   1523    clear     none
     03:00    60    31      1   240  (WSW)   1228    clear     none
     04:00    61    31      1   120  (ESE)    749    clear     none
     05:00    57    31      2   128   (SE)   1313    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