Subject: 3.5m Night Log 20251121 From: tsutherland@apo.nmsu.edu Date: Sat, 22 Nov 2025 13:29:50 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Friday, November 21, 2025 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- UW02 P.Yoachim Z.Xu,D.Meng UW01 S.Hawley L.Hebb,M.Schutte UW04 S.Hawley L.Hebb ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- UW02 KOSMOS 18:13 20:38 UW01 ARCTIC 20:52 05:17 UW04 ECHELLE 05:20 06:10 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- UW02/R 17:08 20:50 0 0 0 0 3.0 0.3 0 0.4 UW01/R 20:50 00:10 0 0 0 0 3.3 0.0 0 0 UW01/R 00:10 05:00 0 0 0 0 4.8 0.0 0 0 UW04/R 05:00 06:31 0 0 0 0 1.5 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: T.Sutherland Restarted kcam nubs at checkout. 3.5m outdoor humidity/dewpoint sensor was way off and needs to be checked. It was reading >90% when the handheld was only reading 25% humidity. See PR 2267. Eventually it got down to a more reasonable level of humidity, but I'm not sure how much I trust it.. The indoor Optidew was also acting up, reading ~75% humidity in the dome regardless of outside conditions. It was also reading the wrong temperature and is off by about 3C. UW02 was 25 minutes late to their time. TUI froze and took a long time to reconnect at 17:50. Only ObsA was affected. At 23:43 and 00:04 my laptop logged itself out of TUI, but ObsA was unaffected. Other than some wispy clouds at the start of the night, we had really nice weather! No IOL this morning, cals were being taken. ------- 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 -------------------------------------------------------------------------- 18:34 kosmos 601( 865) 17 56 2.3 3.4 2.6 3.4 2.0 -- 1.16 21:00 arctic 477( 744) 115 46 3.3 1.2 2.2 1.5 2.2 SDSS_i 0.75 05:25 ecamera 527( -206) 70 48 5.0 3.4 3.8 3.4 4.4 clear 0.86 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 39 12 4 279 (W) 52 ptly cldy none 17:00 37 37 8 306 (NW) ptly cldy none 18:00 37 52 9 331 (NNW) mstly clr none 19:00 36 21 7 345 (NNW) 31 mstly clr none 20:00 36 25 7 343 (NNW) 33 clear none 21:00 38 28 4 284 (WNW) clear none 22:00 37 23 5 261 (W) 37 clear none 23:00 36 21 6 260 (W) 50 clear none 00:00 40 15 7 262 (W) 52 clear none 01:00 39 13 5 261 (W) 72 clear none 02:00 40 13 5 197 (SSW) 64 clear none 03:00 39 14 9 183 (S) 108 clear none 04:00 40 17 8 185 (S) 187 clear none 05:00 41 21 11 183 (S) 596 clear none 06:00 39 22 11 182 (S) 647 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: 3.1.8