Subject: 3.5m Night Log 20251108 From: tsutherland@apo.nmsu.edu Date: Sun, 9 Nov 2025 13:07:01 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Saturday, November 08, 2025 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- UW02 P.Yoachim Z.Xu,Z.Liu AP02 S.Merkowitz R.McMillan,T.Sutherland UW04 S.Hawley S.Hawley,L.Hebb ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- UW02 KOSMOS 17:17 20:57 AP02 APOLLO 21:05 23:28 UW04 ECHELLE 23:36 05:43 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- UW02/R 17:15 21:10 0 0 0 0 2.7 1.2 0 0 AP02/R 21:10 23:40 0 0 0 0 0.0 2.5 0 0 UW04/R 23:40 06:20 0 0 0 0 0.0 6.7 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: T.Sutherland Opened the dome at 16:25 to start venting. AP02 donated a half hour to UW04, and that change was reflected in section 3 of this log. Restarted dataq at 02:30. Adjusted tertiary tilts for Apollo. Didn't need to adjust tert tilts for echelle since pointing looked fine. Weather was night until it was time for Apollo (go figure) when the clouds rolled in. Clouds cleared around 2am but after that seeing was nearly 3arcsec. Clouds were a pest but never caused us to close. Dome cameras logged themselves out near dawn. Around midnight, my TUI froze completely, and I had to ssh into obsA and kill my obsA login session in order to close it. ------- 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 -------------------------------------------------------------------------- 17:59 kosmos 461( 1051) 46 41 9.1 10.1 10.0 9.6 8.9 -- 1.19 21:30 APOLLO 425( 1660) 107 29 8.5 7.0 7.7 6.7 8.1 -- 1.40 23:54 ecamera 376(-250) 276 74 6.7 5.95 6.62 5.78 ND2 1.34 21:30 APOLLO 425( 1660) 107 29 8.5 7.0 7.7 6.7 8.1 -- 1.40 03:07 ecamera 499( -243) 68 54 1.3 3.2 4.3 2.9 1.7 clear 2.82 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 51 22 10 351 (N) 425 clear none 17:00 49 22 1 153 (SSE) 453 clear none 18:00 48 22 12 58 (ENE) 484 clear none 19:00 46 19 12 80 (E) 685 clear none 20:00 46 19 12 69 (ENE) 820 clear none 21:00 46 18 7 86 (E) 802 ptly cldy none 22:00 47 20 1 204 (SSW) 543 ptly cldy none 23:00 44 20 6 71 (ENE) 418 mstly cldy none 00:00 44 21 0 255 (WSW) 1822 mstly cldy none 01:00 45 21 2 326 (NW) 591 ptly cldy none 02:00 44 21 2 330 (NNW) 664 clear none 03:00 34 21 12 67 (ENE) 1836 clear none 04:00 33 21 14 68 (ENE) 1535 clear none 05:00 33 21 8 54 (NE) 1515 clear none 06:00 38 19 8 42 (NE) 1325 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