Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, January 06, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
EN01  B.Ketzeback       R.McMillan                                       

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
EN01  Tspec          17:40   18:50   
EN01  Echelle        19:00   22:00
EN01  Shack          22:10   23:50
EN01  NA2GDR         00:10   02:20

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
EN01/R      17:21  06:58    0   4.5   0    0   3.7  5.5   0    0


note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------

Observing Specialist: R.McMillan

We had clouds all night long, but for much of the night it was possible to shoot through them.  I had good seeing for echelle new-icc tests and collimation, then while I was taking pointing model data the clouds got worse.  At the end of the pointing model I decided they were thick enough that I should close.


                    ------- 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
--------------------------------------------------------------------------
 19:13 ecamera    395( -313)  73  59   3.8  4.1  4.2  3.6  3.4   Clr  0.84
 22:19 shack   465( 1387)  65  56   4.1  2.0  3.7  3.0  3.7   -  1.00
 00:00 guider   433(  834)  27  72   4.1  3.3  4.0  3.5  3.9   B  1.25


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    41     1     11   308   (NW)    191  ptly cldy   none 
     17:00    39     4      6   267    (W)    169  ptly cldy   none 
     18:00    39     6      5   270    (W)    177  ptly cldy   none 
     19:00    40     8      5   339  (NNW)    169  ptly cldy   none 
     20:00    39    10      6   274    (W)    193  ptly cldy   none 
     21:00    40    12      8   263    (W)    216  ptly cldy   none 
     22:00    39     6      8   263    (W)    161  ptly cldy   none 
     23:00    39     2     12   263    (W)    186  ptly cldy   none 
     00:00    40     0     19   260    (W)    231  ptly cldy   none 
     01:00    40    11     16   260    (W)    208 mstly cldy   none 
     02:00    40     9     18   272    (W)    169 mstly cldy   none 
     03:00    39    13     19   264    (W)    222 mstly cldy   none 
     04:00    39    12     16   248  (WSW)    206   cloudy     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