Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, September 05, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
NM04  M.Prescott        M.Prescott,J.Burchett 
BY02  E.Hintz           G.Steed,M.Gee         

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM04  KOSMOS         --:--   --:--   
BY02  TSPEC          04:36   05:42

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM04/R      19:31  01:10   5.7   0    0    0   0.0  0.0   0    0
BY02/R      01:10  06:33   0.3  4.0   0    0   0.0  1.1   0    0

note: scheduled times listed include instrument change time

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

We had some nice thunderstorms this evening and then a lot of low clouds and elevated humidity. We did open up and get a little bit of data at the end of the night, despite the clouds. 

No new telescope or instrument problems. 

                    ------- 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
--------------------------------------------------------------------------
 04:46 tcamera    385( 1502) 221  37  15.0 15.9 17.5 15.7 15.0   Ks  1.09


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    70    51      1   238  (WSW)    677  ptly cldy   none 
     17:00    63    47      7    78  (ENE)    693   cloudy     rain 
     18:00    59    33     14    51   (NE)          cloudy   lt rain
     19:00    63    32      6   350    (N)    564   cloudy   lt rain
     20:00    62    31      4   352    (N)    654   cloudy     none 
     21:00    62    31      9    52   (NE)    567   cloudy     none 
     22:00    64    32     11    84    (E)    371   cloudy   lt rain
     23:00    63    31      8    94    (E)    320   cloudy     none 
     00:00    62    31      9   107  (ESE)    561   cloudy     none 
     01:00    62    31     15   123  (ESE)    888   cloudy     none 
     02:00    61    31     15   131   (SE)   1037   cloudy     none 
     03:00    60    31     13   134   (SE)   1645   cloudy     none 
     04:00    60    31     13   178    (S)   1678  ptly cldy   none 
     05:00    59    30     10   177    (S)   1151  ptly cldy   none 
     06:00    59    29     11   183    (S)   1282  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.

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

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