Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, May 24, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
BY04  E.Hintz           S.Felvus,G.Steed,M.Gee
JH02  C.Ingebretsen     C.Ingebretsen         

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
BY04  TSPEC          21:41   00:05   
JH02  ECHELLE        00:10   03:11

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
BY04/R      20:10  01:10    0  1.5    0    0   0.0  3.5   0    0
JH02/R      01:10  05:50   2.7   0    0    0   0.5  1.5   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend

Storms just east of us kept us closed at sunset. Opened at 21:40 to decent seeing. Closed back up a little after 03:00 when radar started popping up nearby. We didn't get back on sky. 

Pollen counts around 20/hr all night. 

Short echelle fill this morning (238). 

No telescope or instrument 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
--------------------------------------------------------------------------
 21:46 tcamera    246( 1400) 159  62  13.7 17.1 17.0 17.2 14.3   Ks  1.14
 22:58 tcamera    552( 1583) 129  36  13.2 14.1 14.5 13.6 13.1   Ks  1.20
 01:17 ecamera    477(  159) 356  35  12.3 11.9 12.7 11.8 11.9   ND2  1.24


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    65    21     17   265    (W)   1362  ptly cldy   none 
     17:00    69    23     19   256  (WSW)   1369  ptly cldy   none 
     18:00    69    21     14   247  (WSW)   1434  ptly cldy   none 
     19:00    65    19     15   224   (SW)   1345  ptly cldy   none 
     20:00    61    18      9   254  (WSW)   1402 mstly clr    none 
     21:00    59    19      7   190    (S)   1387    clear     none 
     22:00    56    27     15   114  (ESE)   1740    clear     none 
     23:00    56    31     14    98    (E)   1614    clear     none 
     00:00    54    31     12    92    (E)   1539    clear     none 
     01:00    54    31     17   112  (ESE)   1548 mstly clr    none 
     02:00    55    31     19   111  (ESE)   1470 mstly clr    none 
     03:00    54    33     23   126   (SE)   1624  ptly cldy   none 
     04:00    54    33     22   126   (SE)   1429 mstly cldy   none 
     05:00    54    32     22   135   (SE)   1153 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