Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, May 23, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW01  P.Yoachim         Z.Liu,Z.Xu            
WY01  M.Brotherton      M.Brotherton,Students 
NM06  W.Roberson        W.Roberson,E.Serviss  

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW01  KOSMOS         20:45   23:31   
WY01  KOSMOS         23:33   00:56
NM06  ECHELLE        01:00   05:40

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW01/R      20:10  23:30    0    0    0    0   0.0  3.3   0    0
WY01/R      23:30  01:10    0    0    0    0   0.0  1.7   0    0
NM06/R      01:10  05:50    0    0    0    0   3.6  1.0   0    0

note: scheduled times listed include instrument change time

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

Sec and tert homed today. See email.

Opened just before evening twilight ended due to cals being taken.

It was a beautiful night with no problems :)


                    ------- 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
--------------------------------------------------------------------------
 21:01 kosmos   390( 1244) 232  71  13.6 16.1 15.9 15.9 13.7   --  0.85
 01:03 ecamera    446(  153)  -5  22  12.4 12.2 12.9 12.1 12.4   ND2  1.52


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    69    20      9   269    (W)   1572  ptly cldy   none 
     17:00    63    20     13   305   (NW)   1736  ptly cldy   none 
     18:00    63    20     19   262    (W)   1862 mstly clr    none 
     19:00    60    21     10   263    (W)   1735 mstly clr    none 
     20:00    58    21      7   246  (WSW)   1628    clear     none 
     21:00    57    21     12   209  (SSW)   1501    clear     none 
     22:00    56    21     12   216   (SW)   1388    clear     none 
     23:00    56    21     13   202  (SSW)   1580    clear     none 
     00:00    56    20      8   234   (SW)   1544    clear     none 
     01:00    54    20      7   208  (SSW)   1361    clear     none 
     02:00    55    21      4   242  (WSW)   1525    clear     none 
     03:00    56    20      5   257  (WSW)   1713    clear     none 
     04:00    54    20      9   306   (NW)   1891    clear     none 
     05:00    53    22      6   278    (W)   1852    clear     none 
     06:00    55    22      5   288  (WNW)   1757    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