Apache Point Observatory 3.5m Telescope Night Log Thursday, September 24, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- CU05 A.Stephens A.Stephens AP01 S.Merkowitz R.McMillan,T.Sutherland UV01 R.Squillace R.Squillace UW01 P.Yoachim Z.Xu,D.Meng ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- CU05 KOSMOS --:-- --:-- AP01 APOLLO --:-- --:-- UV01 ARCTIC --:-- --:-- UW01 KOSMOS --:-- --:-- PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- CU05/R 19:05 00:10 0 5.1 0 0 0.0 0.0 0 0 AP01/W 00:10 01:10 0 1.0 0 0 0.0 0.0 0 0 UV01/R 01:10 04:10 0 3.0 0 0 0.0 0.0 0 0 UW01/R 04:10 06:45 0.9 1.7 0 0 0.0 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: A.Townsend The rain let up in the afternoon just long enough for test slews, but we had thunderstorms all night including a lot of heavy rain and some added thick fog after 04:00. There were a few power flickers but we stayed on utility all night. We did not open. ------- 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 54 30 6 217 (SW) 371 cloudy none 17:00 53 30 21 147 (SSE) 165 cloudy lt rain 18:00 52 29 15 126 (SE) 175 cloudy none 19:00 52 29 18 129 (SE) 230 cloudy lt rain 20:00 53 29 10 175 (S) 423 cloudy rain 21:00 53 30 13 142 (SE) 633 cloudy rain 22:00 52 27 13 135 (SE) 448 cloudy rain 23:00 50 27 13 90 (E) 440 cloudy rain 00:00 47 24 15 35 (NE) 379 cloudy rain 01:00 49 24 11 146 (SE) 265 cloudy rain 02:00 49 12 19 126 (SE) 321 cloudy rain 03:00 49 8 18 126 (SE) 61381 cloudy rain 04:00 49 5 11 112 (ESE) 201 cloudy lt rain 05:00 49 7 23 213 (SSW) 7787 cloudy lt rain 06:00 49 20 14 193 (SSW) 14335 cloudy rain 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