Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, January 18, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
WY01  M.Brotherton      M.Brotherton          
NM07  K.Sanderson       K.Sanderson           
UW11  S.Hawley          S.Hawley              

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY01  KOSMOS         17:52   20:04   
NM07  KOSMOS         20:04   23:42
UW11  ECHELLE        23:52   06:30

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY01/R      17:32  20:12    0    0    0    0   2.7  0.0   0    0
NM07/R      20:12  00:10    0    0    0    0   4.0  0.0   0    0
UW11/R      00:10  06:56    0    0    0    0   6.8  0.0   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: H.Abbot, J. Dembicky

Mostly clear night with great seeing. Light cloud disrupted guiding briefly around 4am.

Telescope worked flawlessly; "the pointing has been great tonight!" to quote the observer.

More training for me, LN2 transfer and cranework with Jack.

                    ------- 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
--------------------------------------------------------------------------
 18:27 klow   575(  937) 136  54   4.9  5.5  5.4  5.2  4.8   gg455  0.72
 20:31 kosmos   510(  810)  -7  51   4.6  4.1  4.7  3.9  4.0   --  1.03
 00:00 ecamera    397( -347) 170  57   4.5  3.3  3.9  3.2  3.5   ND3  0.69


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    43     6     11    51   (NE)    583 mstly clr    none 
     17:00    42     1      9     9    (N)    233 mstly clr    none 
     18:00    42    -1      8    20  (NNE)    106 mstly clr    none 
     19:00    39     2     15   324   (NW)     87 mstly clr    none 
     20:00    42     1     17   308   (NW)     78 mstly clr    none 
     21:00    40     4     15   315   (NW)     99    clear     none 
     22:00    41     5     11   308   (NW)     90    clear     none 
     23:00    39     2      7   260    (W)    121    clear     none 
     00:00    40     4     12   266    (W)    135 mstly clr    none 
     01:00    39     3     13   268    (W)    158 mstly clr    none 
     02:00    39     6      9   293  (WNW)    289 mstly clr    none 
     03:00    39     5      7   283  (WNW)    229 mstly clr    none 
     04:00    40     4     13   309   (NW)    155  ptly cldy   none 
     05:00    41     4     14   271    (W)    108 mstly clr    none 
     06:00    41     2     16   312   (NW)    112 mstly clr    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