Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, August 26, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
GS02  D.Gies            A.Chaturvedi          
AP02  S.Merkowitz       R.McMillan,T.Sutherland
BY03  E.Hintz           G.Steed,M.Gee         

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
GS02  ECHELLE        --:--   --:--   
AP02  APOLLO         --:--   --:--
BY03  TSPEC          --:--   --:--

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
GS02/R      19:44  22:27    0   2.7   0    0   0.0  0.0   0    0
AP02/W      22:27  01:10    0   2.7   0    0   0.0  0.0   0    0
BY03/R      01:10  06:26   0.4  4.9   0    0   0.0  0.0   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend

Echelle blue cal filter had to be commanded a second time during observer's cals to work. 

We had lots of clouds and nearby radar, and it even sprinkled on us on and off throughout the night. We didn't open at all. 

                    ------- 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
--------------------------------------------------------------------------


               ------------- WEATHER LOG ----------------

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    69    42      6   113  (ESE)   1961  ptly cldy   none 
     17:00    72    42      5   181    (S)   1896  ptly cldy   none 
     18:00    76    41     15   224   (SW)   2042  ptly cldy   none 
     19:00    72    39      7   247  (WSW)   1906  ptly cldy   none 
     20:00    68    38      5   223   (SW)   1949 mstly cldy   none 
     21:00    66    41     17    21  (NNE)   9580   cloudy   lt rain
     22:00    65    41     22    42   (NE)   3940   cloudy     none 
     23:00    63    42     18    57  (ENE)   2374   cloudy   lt rain
     00:00    65    40     12    69  (ENE)   2595   cloudy     none 
     01:00    62    42     16    72  (ENE)   1944   cloudy     none 
     02:00    66    39      7    15  (NNE)   1815   cloudy   lt rain
     03:00    64    40      6   236   (SW)   1962   cloudy     none 
     04:00    63    41      3   116  (ESE)   2165   cloudy     none 
     05:00    65    40      2   240  (WSW)   1725   cloudy     none 
     06:00    62    41      2   227   (SW)   2005 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.

              ----------  TELESCOPE SOFTWARE  ----------

Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 3.2.2