Subject: 3.5m Night Log 20241020
From: cgray@apo.nmsu.edu
Date: Mon, 21 Oct 2024 13:17:00 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, October 20, 2024
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
WY02  C.Kobulnicky      C.Kobulnicky
BY06  J.Davidson        B.Boizelle
AP01  S.Merkowitz       R.McMillan, B.Ketzeback
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY02  KOSMOS         19:31   23:52
WY02  Echelle	     23:55   00:57
BY06  TripleSpec     01:13   05:53
AP01  APOLLO         06:04   07:01
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY02/R      18:32  01:10   1.0   0    0    0   1.3  4.4   0    0
BY06/R      01:10  06:04    0    0    0    0   0.0  4.9   0    0
AP01/R      06:04  07:04    0    0    0    0   0.0  1.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
The night started out with fog clouds and high humidity. I thought it would only get worse after sunset but it started improving as twilight progressed! As the wind shifted, the humidity kept dropping and seeing improved. There were clouds off and on for most of the night, but even those cleared by about 4am.
                    ------- 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
--------------------------------------------------------------------------
 19:45 kosmos   425( 1305) 152  59  10.3 11.2 10.9 11.0 10.2   --  1.49
 01:20 tcamera    344( 1334) 224  63   9.7  9.4  9.9  9.3  9.3   Ks  1.19
 06:08 APOLLO     300( 1733) 286  53   7.9  7.4  8.0  7.4  7.6   530  1.00
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    55    43     16   211  (SSW)        mstly clr    none
     17:00    56    43     21   219   (SW)   1133 mstly clr    none
     18:00    52    44     20   202  (SSW)        mstly clr    none
     19:00    50    44     20   208  (SSW)        mstly clr    none
     20:00    50    39     17   204  (SSW)   1490 mstly clr    none
     21:00    51    34     15   198  (SSW)   1169 mstly cldy   none
     22:00    52    33     20   224   (SW)   1007 mstly cldy   none
     23:00    52    34     13   227   (SW)   1117 mstly cldy   none
     00:00    51    35     14   240  (WSW)   1207 mstly cldy   none
     01:00    49    37     12   262    (W)   1071  ptly cldy   none
     02:00    48    37     10   272    (W)   1195  ptly cldy   none
     03:00    48    32     14   286  (WNW)    985 mstly clr    none
     04:00    48    32     18   273    (W)    997    clear     none
     05:00    47    32     13   273    (W)   1000    clear     none
     06:00    46    31     13   269    (W)    983    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.
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