Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, March 18, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
GS01  D.Michael         M.Crenshaw+Class      
UW02  P.Yoachim         Z.Yu,D.Meng,Z.Liu     
NM01  S.Monty           S.Monty               

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
GS01  KOSMOS         19:30   23:05
GS01  EYEPIECE       23:10   00:03  
UW02  KOSMOS         01:17   03:59
NM01  ECHELLE        04:12   06:47     

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
GS01/R      19:22  01:10    0    0    0    0   5.8  0.0   0    0
UW02/R      01:10  04:05    0    0    0    0   2.9  0.0   0    0
NM01/R      04:05  07:00    0    0    0    0   2.9  0.0   0    0

note: scheduled times listed include instrument change time

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

A lovely clear night with good seeing.  Telescope and instruments behaved well.

ARCSAT had trouble connecting to DCAM, and I was unable to get that resolved before the targets got too low to observe.

                    ------- 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
--------------------------------------------------------------------------
 19:59 khigh   325( 1191) 171  47  13.8 16.1 15.3 15.3 13.7   -  1.21
 01:30 kosmos   475( 1148)  50  44  13.9 11.9 12.7 11.7 12.7   -  0.98
 04:39 ecamera    507(  185) -85  68  13.8 12.4 13.1 12.5 13.7   Clr  0.74



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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    63    22      7   263    (W)   1109    clear     none 
     17:00    60    22      9   293  (WNW)   1065    clear     none 
     18:00    64    23      5   260    (W)   1194    clear     none 
     19:00    59    21      5   261    (W)   1595    clear     none 
     20:00    57    21      5   250  (WSW)   1401    clear     none 
     21:00    57    21      3   232   (SW)   1453    clear     none 
     22:00    57    21      6   263    (W)   1586    clear     none 
     23:00    57    21      6   272    (W)   1444    clear     none 
     00:00    56    21      6   314   (NW)   1269    clear     none 
     01:00    56    20      7   350    (N)    661    clear     none 
     02:00    56    19      7   349    (N)    479    clear     none 
     03:00    56    19      5   350    (N)    454    clear     none 
     04:00    57    18      6     7    (N)    402    clear     none 
     05:00    57    16     14    14  (NNE)    404    clear     none 
     06:00    58    14     13    27  (NNE)    320    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