Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, April 21, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
NM07  T.McQuaid         T.McQuaid             
WC01  A.Jaskot          A.Jaskot              

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM07  ECHELLE        19:46   01:09   
WC01  KOSMOS         01:12   02:15

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM07/R      19:46  01:10    0    0    0    0   0.1  5.3   0    0
WC01/R      01:10  06:17    4.1   0    0    0   1   0.0   0    0

note: scheduled times listed include instrument change time

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

Beautiful and clear A half of the night. Clouds rolled in just before 2am which made observing with Kosmos quite difficult. Clouds weren't going away any time soon, so we called it a night at 2:15am. Fills done at 3:30am. 

Echelle iol didn't work (negative numbers) this morning, so grafana will need to be edited.

No major problems tonight.

                    ------- 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
--------------------------------------------------------------------------
 20:15 ecamera    545(  320) 170  76  12.3 14.5 13.8 14.1 12.6   clear  0.99
 22:01 ecamera    477(  133) -158  80  11.8 12.0 12.3 11.6 11.4   clear  0.97
 01:27 klow   552( 1156) -78  66  11.3 10.8 11.4 10.8 11.0   --  0.80


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    61    28     18   261    (W)   1555  ptly cldy   none 
     17:00    61    28     12   240  (WSW)   1419  ptly cldy   none 
     18:00    61    26      8   243  (WSW)   1329  ptly cldy   none 
     19:00    56    24      6   265    (W)   1461 mstly clr    none 
     20:00    54    24      5   256  (WSW)   1419    clear     none 
     21:00    54    21      9   250  (WSW)   1724    clear     none 
     22:00    53    21     14   237  (WSW)   1324    clear     none 
     23:00    53    19     14   261    (W)   1360    clear     none 
     00:00    53    18     14   261    (W)   1396    clear     none 
     01:00    52    17     10   264    (W)   1302    clear     none 
     02:00    52    14     11   267    (W)    907  ptly cldy   none 
     03:00    52    16     14   275    (W)   1015 mstly 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