Apache Point Observatory 3.5m Telescope Night Log Tuesday, August 11, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- GS01 D.Michael M.Davis UW01 P.Yoachim Z.Xu,Z.Liu,D.Meng NM03 K.Sanderson K.Sanderson ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- GS01 KOSMOS --:-- --:-- UW01 KOSMOS --:-- --:-- NM03 KOSMOS --:-- --:-- PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- GS01/R 20:01 01:10 5.2 0 0 0 0.0 0.0 0 0 UW01/R 01:10 03:43 2.6 0 0 0 0.0 0.0 0 0 NM03/R 03:43 06:16 2.5 0.1 0 0 0.0 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: H.Abbot Nearby rainclouds, extremely high dust levels (over 100k), and high winds kept us closed at the start of the night. Dust persisted throughout the night, barely reaching but never going below 4k counts by the end of the night. No telescope or instrument issues to report. Domecam, Roofcam and Alcor needed to be logged into again because Windows updates. Didn't realise Dataq wasn't recording until 03:45, so set that up then. ------- 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 -------------------------------------------------------------------------- ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 73 44 3 239 (WSW) 1709 ptly cldy none 17:00 74 43 4 172 (S) 1717 ptly cldy none 18:00 73 43 8 263 (W) 1740 ptly cldy rain 19:00 67 47 2 214 (SW) 1618 ptly cldy lt rain 20:00 66 42 21 208 (SSW) mstly clr dust 21:00 59 33 10 190 (S) 61156 clear dust 22:00 61 32 7 198 (SSW) 26739 clear dust 23:00 61 32 6 243 (WSW) 16046 clear dust 00:00 60 32 12 215 (SW) 14791 clear dust 01:00 58 32 8 253 (WSW) 9498 mstly clr dust 02:00 59 31 9 212 (SSW) 5350 clear dust 03:00 60 31 9 229 (SW) 4241 clear dust 04:00 60 31 7 264 (W) 4809 clear 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: 3.2.2