Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, January 16, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
WY01  M.Brotherton      M.Brotherton          
WY02  M.Moe             C.Smith               
UW02  P.Yoachim         Z.Xu,Z.Liu            

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY01  KOSMOS         17:56   20:02   
WY02  ECHELLE        20:08   04:08
UW02  KOSMOS         04:15   06:11

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY01/R      17:30  20:10    0    0    0    0   2.7  0.0   0    0
WY02/R      20:10  00:10    0    0    0    0   4.0  0.0   0    0
WY02/R      00:10  04:10    0    0    0    0   4.0  0.0   0    0
UW02/R      04:10  06:57    0    0    0    0   2.3  0.5   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend,H.Abbot


Clear night other than one blip of clouds right after 03:00, decent seeing. No telescope or instrument problems. 

Initial training for our new observing specialist Harry Abbot! 

04:30 KOSMOS focus at high airmass.


                    ------- 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
--------------------------------------------------------------------------
 18:10 klow   300(  583) 135  50   1.1  3.7  3.8  3.5  1.4   --  1.03
 20:13 ecamera    419( -449) -19  42  -0.5  0.4  1.2  0.2 -0.1   Clear  1.24
 04:29 kosmos   490(  555) -143  17  -1.6 -1.6 -1.6 -2.1 -1.6   --  2.45


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    37     9     12   315   (NW)    466    clear     none 
     17:00    35     5      9     8    (N)    304    clear     none 
     18:00    34     7      4   336  (NNW)    165    clear     none 
     19:00    33    11     15   315   (NW)    202    clear     none 
     20:00    33    10     14   301  (WNW)    306    clear     none 
     21:00    32    12     15   317   (NW)    356    clear     none 
     22:00    33    12     16   314   (NW)    565    clear     none 
     23:00    32    13     16   311   (NW)    665    clear     none 
     00:00    31    14      2   312   (NW)    948    clear     none 
     01:00    28    14      8   319   (NW)   1129    clear     none 
     02:00    29    14      2   311   (NW)   1448    clear     none 
     03:00    29     8     12   309   (NW)    580 mstly clr    none 
     04:00    29     4      1     2    (N)    304    clear     none 
     05:00    28     3      9   326   (NW)    263    clear     none 
     06:00    29     0     12     8    (N)    144    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