Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, May 03, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW11  C.Chandler        M.Frissell,D.Singh    
BY03  E.Hintz           G.Steed,S.FelvusRichmond

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW11  ARCTIC         20:41   01:02   
BY03  TSPEC          01:18   05:49

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW11/R      19:55  01:10    0    0    0    0   2.1  3.2   0    0
BY03/R      01:10  06:05    0    0    0    0   0.0  4.9   0    0

note: scheduled times listed include instrument change time

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

Frustrating clouds all night long but we persisted and got a few photons through them. 

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
--------------------------------------------------------------------------
 20:49 arctic   749( 1419)  54  33   8.6  9.6  8.1  9.4  8.6   CU_VR  1.49
 00:26 arctic   535( 1156)  16  39   9.7  8.7  9.1  8.7  9.2   SDSS_r  1.08
 01:28 tcamera    519( 1290)  85  42   9.4  8.7  9.1  8.8  9.1   Ks  1.37


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    50    37     12   233   (SW)    838   cloudy     none 
     17:00    48    37     11   210  (SSW)    823   cloudy     none 
     18:00    48    37     13   216   (SW)    775   cloudy     none 
     19:00    48    37     15   249  (WSW)    832  ptly cldy   none 
     20:00    48    35     14   262    (W)   1011  ptly cldy   none 
     21:00    47    36     19   236   (SW)   1119 mstly clr    none 
     22:00    49    36     16   259    (W)   1098  ptly cldy   none 
     23:00    48    36     16   261    (W)   1058   cloudy     none 
     00:00    49    34     15   258  (WSW)   1097   cloudy     none 
     01:00    50    33     16   257  (WSW)    981   cloudy     none 
     02:00    49    35     10   257  (WSW)   1026   cloudy     none 
     03:00    48    35     15   265    (W)   1043   cloudy     none 
     04:00    48    35     15   258  (WSW)   1250   cloudy     none 
     05:00    46    36     11   263    (W)   1194   cloudy     none 
     06:00    48    31     12   270    (W)   1753   cloudy     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