Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, February 24, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
CU01  Z.Berta-Thompson  Z.Berta-Thompson      
UW11  S.Hawley          S.Hawley,L.Hebb       

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU01  KOSMOS         18:40   00:10   
UW11  ECHELLE        00:15   05:54

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU01/R      18:05  00:10    0    0    0  0.2   0.0  5.9   0    0
UW11/R      00:10  06:27    0    0    0    0   4.2  2.1   0    0

note: scheduled times listed include instrument change time

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

Light cloud overhead at the start of the night, gradually got worse through to midnight, and back to light cloud by end of night. Not enough to stop observations.


tcc lost communication with na2-rotator by afternoon checks. Reset na2-rotator and restarted tcc to get it working.
Lost connection to na2-guider, gcam was stuck running previous command. Restarting gcam and gcamera nub fixed problem, lost about 10 mins on sky.

                    ------- 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
--------------------------------------------------------------------------
 18:55 kosmos     490( 1036)  32  71   9.1  9.6  9.7  9.3  8.8   --     1.06
 00:19 ecamera    473(  -31) -73  51   8.9  8.3  8.9  8.3  8.7   clear  1.20


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    53    13     15   308   (NW)    669    clear     none 
     17:00    52    14      9   258  (WSW)   1074 mstly clr    none 
     18:00    49    14     12   264    (W)   1172  ptly cldy   none 
     19:00    48    12     11   261    (W)   2382  ptly cldy   none 
     20:00    48    13      8   257  (WSW)   1441  ptly cldy   none 
     21:00    50    14     10   266    (W)    786  ptly cldy   none 
     22:00    50    14     10   290  (WNW)    752  ptly cldy   none 
     23:00    50    15      4   321   (NW)    712 mstly cldy   none 
     00:00    48    17      4   321   (NW)    763 mstly cldy   none 
     01:00    47    20      9    20  (NNE)    501 mstly cldy   none 
     02:00    48    20     11     8    (N)    422  ptly cldy   none 
     03:00    46    21     14    17  (NNE)    393  ptly cldy   none 
     04:00    46    22      9   357    (N)    383  ptly cldy   none 
     05:00    46    22     10   333  (NNW)    335  ptly cldy   none 
     06:00    46    23     12   315   (NW)    302  ptly cldy   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