Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, July 04, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
NM07  E.Nielsen         A.Abbas,A.Smith       
WY03  M.Brotherton      M.Brotherton+class    

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM07  ECHELLE        20:41   00:15   
WY03  ECHELLE        02:40   04:48

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM07/R      20:24  01:10   0.2  0.9   0    0   2.7  1.0   0    0
WY03/R      01:10  05:52    0   1.5   0    0   0.0  3.2   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan

Afternoon sprinkles improved enough that we were able to open not too long after sunset, and first half had some decent seeing and a few hours of mostly=clear skies.  (I didn't get the focus properly recorded, but seeing was measured at 1.08" arcsec.)  Then around midnight, an outflow from a distant storm triggered some precipitation nearby and we had to close again for a while.  Once the outflow passed, we opened again to worse seeing and more clouds.

                    ------- 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
--------------------------------------------------------------------------
 03:48 kosmos   425( 1197) -74  60  14.6 14.3 15.1 14.2 14.1   -  1.58


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    72    35      9   142   (SE)   1149 mstly cldy lt rain
     17:00    75    35      7   178    (S)   1089 mstly cldy   none 
     18:00    74    35      3   237  (WSW)   1151  ptly cldy   none 
     19:00    68    39     13   130   (SE)   1205  ptly cldy   none 
     20:00    67    36      9    85    (E)   1033  ptly cldy   none 
     21:00    69    34      3   253  (WSW)   1134  ptly cldy   none 
     22:00    68    34     18   135   (SE)   1088 mstly clr    none 
     23:00    65    37     22   132   (SE)   1598 mstly clr    none 
     00:00    63    40     16    85    (E)   1768  ptly cldy   none 
     01:00    59    42     15    83    (E)   2042 mstly cldy   none 
     02:00    57    47     24    76  (ENE)   2951 mstly cldy   none 
     03:00    57    47     16    88    (E)   2740  ptly cldy   none 
     04:00    59    46     11    99    (E)   2137  ptly cldy   none 
     05:00    63    42      6    95    (E)   1718 mstly 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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