Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, March 28, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW11  S.Hawley          S.Hawley,L.Hebb       
OU03  K.Leighly         G.Garcia              

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW11  ECHELLE        19:29   22:38   
OU03  NICFPS         --:--   --:--

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW11/R      19:29  01:10    0   2.5    0    0   0.0  3.2   0    0
OU03/R      01:10  06:47    1.6    4    0    0   0   0   0    0

note: scheduled times listed include instrument change time

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

Motion error going down to 45deg alt at 19:55 slewing to first target of the night.

Dust jumped up at 22:30 to over the closure limit, closed a few minutes later. Dust stayed high through remainder of the night. Gave up at 4:30am. 

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
--------------------------------------------------------------------------
 19:53 ecamera    632(  251) 104  81   9.7 11.2 10.4 11.1  9.8   clear  0.68
 21:52 ecamera    481(   59) -95  29  10.1  9.6 10.0  9.3  9.5   clear  0.95

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    52    28      6   196  (SSW)   1464  ptly cldy   none 
     17:00    54    28      7   199  (SSW)   1831  ptly cldy   none 
     18:00    52    29      3   239  (WSW)   2284  ptly cldy   none 
     19:00    52    12      1   258  (WSW)   1056  ptly cldy   none 
     20:00    50    13      4   258  (WSW)   1238 mstly clr    none 
     21:00    51    14      7   226   (SW)   1546 mstly clr    none 
     22:00    50    15      8   199  (SSW)   2384 mstly clr    none 
     23:00    51    31      4   235   (SW)   6516 mstly clr    dust 
     00:00    50    29      2   114  (ESE)   6679 mstly clr    dust 
     01:00    45    31      9   189    (S)   7439 mstly clr    dust 
     02:00    43    31      7   185    (S)   7269 mstly clr    dust 
     03:00    45    31      7   189    (S)   8141 mstly clr    dust 
     04:00    46    30      4   187    (S)   7798 mstly clr    dust 

     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