Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, December 25, 2025

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
AP02  S.Merkowitz       R.McMillan,T.Sutherland
UW02  P.Yoachim         Z.Xu,Z.Liu            
UW11  B.Benda           B.Benda               

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AP02  APOLLO         17:12   20:20   
UW02  KOSMOS         21:31   23:59
UW11  ECHELLE        00:03   06:24

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
AP02/R      17:12  21:20    0    1    0    0   0.0  3.1   0    0
UW02/R      21:20  00:10    0    0    0    0   1.5  1.3   0    0
UW11/R      00:10  06:55    0    0    0    0   6.8  0.0   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland

Closed for a little while at the end of apollo because the rain sensor erroneously went off. Apollo finished early though so I just stayed closed until UW02 logged in. 

Cals were being taken until 21:30 for UW02.

Kosmos disperser wheel got stuck just after 22:30.

Rain alarm went off twice despite moderate humidity and no clouds overhead. Went most of the night with it disabled. 


                    ------- 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
--------------------------------------------------------------------------
 17:28 APOLLO     600( 1936) -45  41   6.9  9.4  9.2  9.1  7.4   --  1.60
 21:50 kosmos   575(  991) -73  30   7.0  6.2  6.9  6.3  6.8   --  1.29
 00:13 ecamera    478( -109) -49  57   7.2  6.6  7.2  6.7  7.0   ND3  0.80


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    48    33      9   263    (W)    843  ptly cldy   none 
     17:00    45    33     14   306   (NW)    899 mstly clr    none 
     18:00    45    36     11   266    (W)        mstly clr    none 
     19:00    44    35      9   263    (W)           clear     none 
     20:00    44    32     11   272    (W)    767    clear     none 
     21:00    44    32     15   298  (WNW)    474    clear     none 
     22:00    45    32     14   293  (WNW)    250    clear     none 
     23:00    45    32     16   295  (WNW)    149    clear     none 
     00:00    46    31     12   282  (WNW)    120    clear     none 
     01:00    45    28     13   330  (NNW)     56    clear     none 
     02:00    46    28      9   353    (N)     47    clear     none 
     03:00    45    26     17   294  (WNW)     37    clear     none 
     04:00    44    27     25   303  (WNW)     51    clear     none 
     05:00    45    27     19   297  (WNW)     33    clear     none 
     06:00    45    29     20   301  (WNW)     32    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