Apache Point Observatory 3.5m Telescope Night Log Wednesday, July 15, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- UW05 C.Chandler C.Chandler,D.Singh,J.Murtagh,I.Chow CU05 A.Stephens P.Wachiraphan UW01 P.Yoachim D.Meng,Z.Liu,Z.Xu ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- UW05 ARCTIC 20:21 01:05 CU05 KOSMOS 01:15 03:18 UW01 KOSMOS (backup instrument, TripleSpec)03:18 05:19 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- UW05/R 20:21 01:10 0 0 0 0 3.6 1.3 0 0 CU05/R 01:10 03:34 0 0 0 0 2.4 0.0 0 0 UW01/R 03:34 05:58 0 0 0 0 2.4 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: H.Abbot Full clear night of observing with terrible seeing to start but eventually improved. No major telescope or instrument issues to report. Had a weird moment where 2 out of 3 observers in UW05 dropped out at the same time. All 3 were observing seperately. Both dropouts were running TUI 3.2.2 whereas the other was using 3.2.0. Both dropouts have Xfinity as their ISP, other does not. This is all the info I could gain. Also had a moment where the kcam images were not updating, despite new frames being taken. Restarting TUI solved this bug. In trying to diagnose the issue, I restarted kcam nubs, and after this the frames being taken started from k0001 again and was overwriting the old files. Unimportant since they were guider images, but seems unintentional to be overwriting old files? ------- 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 -------------------------------------------------------------------------- 20:44 arctic 591( 1614) -39 41 14.9 17.2 17.2 17.3 15.4 CUVR 1.90 00:46 arctic 451( 1231) 10 35 12.0 11.9 12.6 11.8 11.8 CUVR 1.80 01:25 kosmos 454( 1122) -157 29 11.6 11.6 12.3 11.4 11.5 -- 2.50 03:29 kosmos 504( 1127) 39 57 12.6 11.1 11.9 11.0 11.9 -- 1.00 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 61 27 6 109 (ESE) mstly cldy none 17:00 64 28 9 136 (SE) mstly cldy none 18:00 62 21 7 90 (E) ptly cldy none 19:00 63 28 7 99 (E) ptly cldy none 20:00 61 25 11 126 (SE) mstly clr none 21:00 58 25 10 88 (E) clear none 22:00 56 24 13 88 (E) clear none 23:00 55 0 11 92 (E) clear none 00:00 54 -1 15 77 (ENE) clear none 01:00 53 0 15 81 (E) clear none 02:00 53 2 12 79 (E) clear none 03:00 54 4 7 34 (NE) clear none 04:00 56 6 8 350 (N) clear none 05:00 55 6 6 353 (N) 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: