Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, July 12, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
OU06  G.Jewett          G.Jewett              
WY02  C.Kobulnicky      K.Zhang               
UW01  P.Yoachim         Z.Xu,Z.Liu,D.Meng     

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU06  ARCTIC         22:58   00:42   
WY02  KOSMOS         --:--   --:--
UW01  KOSMOS         03:43   05:10

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU06/R      20:22  01:10  3.0    0    0    0   1.8  0.0   0    0
WY02/R      01:10  03:33  2.4    0    0    0   0.0  0.0   0    0
UW01/R      03:33  05:56  0.2    0    0    0   1.1  1.1   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: H.Abbot

Nearby rain, high humidity, and high winds kept us close until 2300. Heavier clouds rolled in again around 0045 so closed up. Clouds thinned out again at 0345. 

LL ARCTIC quad had small amount of saturated values along left edge at afternoon checkout, disappeared by sunset.

Following warning kept popping up through the night: 
2026-07-13 06:34:46 .tcc.0 0 tcc W Text="On Full Step Error: ?GOPOS one or more axes did not end on a full step  1,  1,  1"
Wiki mentions to home the seconday and tertiary, but not to sacrifice on-sky time for it, so left it as an exercise for tomorrow afternoon.

                    ------- 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
--------------------------------------------------------------------------
 23:05 arctic   566( 1516)  42  33  12.6 15.4 17.3 14.7 13.3   BG40  2.36
 03:55 kosmos   580( 1292)  35  58  13.1 12.9 13.9 12.9 13.0   --    0.87


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    67    32      8    89    (E)          cloudy     rain 
     17:00    68    31      9   112  (ESE)          cloudy     none 
     18:00    66    32     11    88    (E)        mstly cldy   none 
     19:00    64    32     19    80    (E)        mstly cldy   none 
     20:00    60    31     15    74  (ENE)         ptly cldy   none 
     21:00    56    31     31    75  (ENE)         ptly cldy   none 
     22:00    55    30     20    80    (E)           clear     none 
     23:00    55    30     17    84    (E)        mstly clr    none 
     00:00    54    31     25    74  (ENE)        mstly cldy   none 
     01:00    55    30     10    81    (E)          cloudy     none 
     02:00    55    29     10    80    (E)          cloudy     none 
     03:00    56    29     10   109  (ESE)          cloudy     none 
     04:00    55    29      7   126   (SE)        mstly clr    none 
     05:00    54    28      7    91    (E)           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: