Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, April 09, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
OU01  M.Kilic           M.Kilic+students      
UW01  P.Yoachim         D.Meng,Z.Xu           
WY01  M.Brotherton      M.Brotherton          

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU01  EYEPIECE       20:45   21:12
OU01  KOSMOS         21:15   01:06  
UW01  KOSMOS         01:09   04:51
WY01  KOSMOS         04:51   06:12


   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU01/R      19:38  01:10    0    0    0    0   5.5  0.0   0    0
UW01/R      01:10  04:51    0    0    0    0   1.4  2.3   0    0
WY01/R      04:51  06:31    0    0    0    0   0.0  1.7   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan

Clear with good seeing first half, then some poor seeing when clouds began to show up second half, then it stabilized to moderate seeing while the clouds continued to be a small nuisance.

Eyepiece time with the class went well, and so did all the observations!


                    ------- 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
--------------------------------------------------------------------------
 21:27 kosmos   435( 1094) 133  74  11.8 12.0 12.4 11.6 11.4   -  0.68
 04:59 kosmos   385(  919) -110  44   9.6  9.0  9.7  8.9  9.2   -  1.81


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    63    27     15   249  (WSW)    658    clear     none 
     17:00    63    25      6   236   (SW)    704    clear     none 
     18:00    63    25     13   239  (WSW)    727    clear     none 
     19:00    57    26      9   205  (SSW)    839    clear     none 
     20:00    54    24      6   186    (S)    795    clear     none 
     21:00    51    24      8   185    (S)    818    clear     none 
     22:00    54    23     11   189    (S)    876    clear     none 
     23:00    54    23     11   182    (S)   1045    clear     none 
     00:00    54    23     11   195  (SSW)   1034    clear     none 
     01:00    50    24     13   147  (SSE)   1173    clear     none 
     02:00    49    29     10   170    (S)    874  ptly cldy   none 
     03:00    51    25     12   239  (WSW)   1185  ptly cldy   none 
     04:00    50    31     15   179    (S)    838 mstly clr    none 
     05:00    50    31     11   168  (SSE)    693  ptly cldy   none 
     06:00    49    31     14   181    (S)    744  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