Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, February 05, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
BY04  E.Hintz           S.Call,M.Gee,G.Steed,S.Richmond
UW11  S.Hawley          L.Hebb                

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
BY04  TripleSpec     17:57   23:58   
UW11  ECHELLE        00:11   06:07

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
BY04/R      17:48  00:10    0    0    0    0   3.9  2.4   0    0
UW11/R      00:10  06:46    0    0    0    0   0.0  6.6   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland,H.Abbot

Did a quick pointing test at the beginning of the night to see if homing the secondary had affected it, pointing was fine. Pointing looked fine when we switched to echelle at midnight. 

Clear beginning of the night with good seeing. Faintest wisp of clouds appeared occasionally throughout A half. Perfectly clear B-half. 

Harry is doing a great job training!

No telescope or instrument problems tonight.

                    ------- 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
--------------------------------------------------------------------------
 18:06 tcamera    529( 1195) 209  47   5.4  6.5  6.1  6.0  5.6   --  1.11
 19:33 tcamera    401(  987) 205  52   4.7  4.8  5.1  4.2  4.3   --  0.97
 00:09 ecamera    442( -292) 286  78   5.3  3.7  4.4  3.4  4.1   ND3  0.79

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    44    18      8   218   (SW)    464    clear     none 
     17:00    42    18      2   209  (SSW)    578    clear     none 
     18:00    42    15      8   141   (SE)    470    clear     none 
     19:00    42     5     14   146   (SE)    289    clear     none 
     20:00    41    -1     16   140   (SE)    221    clear     none 
     21:00    42    -8     14   152  (SSE)     36    clear     none 
     22:00    41    -9     11   165  (SSE)     57    clear     none 
     23:00    40    -8      9   141   (SE)     44    clear     none 
     00:00    41    -8      7   135   (SE)     65    clear     none 
     01:00    41    -9      7   183    (S)     68    clear     none 
     02:00    40   -10      6   186    (S)    148    clear     none 
     03:00    40    -9      7   225   (SW)    174    clear     none 
     04:00    40   -10      6   261    (W)    141    clear     none 
     05:00    43    -7      6   259    (W)    155    clear     none 
     06:00    42     6      4   264    (W)    380    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.

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

Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 3.1.8