Apache Point Observatory 3.5m Telescope Night Log Sunday, May 10, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- CU03 A.Kowalski J.Libby-Roberts, P.Premnath UW06 A.Heinze A.Heinze ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- CU03 ARCTIC 20:15 01:10 UW06 ARCTIC 01:10 05:32 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- CU03/R 20:00 01:10 1.2 0 0 0 4.0 0.0 0 0 UW06/R 01:10 05:59 0 0 0 0 1.6 3.2 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: T.McQuaid restarted Kosmos icc at checkout due to Torrent Error: ERROR: command >(null)< not found. opened slightly late due to some clouds in the vicinity very bad seeing at start of night but we were using the Arctic diffuser anyways closed for humidity at 23:00, reopened at 23:55 for the remainder of the night ------- 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 -------------------------------------------------------------------------- 20:39 arctic 650( 1417) 34 40 8.4 11.6 13.7 11.8 8.9 SDSS_r 4.33 01:08 arctic 466( 995) -47 34 8.1 6.6 7.5 6.5 8.4 CU_VR 2.89 02:42 arctic 592( 1240) 1 35 11.8 9.1 9.6 9.3 10.9 CU_VR 1.50 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 65 21 12 260 (W) 1544 cloudy none 17:00 52 33 20 70 (ENE) 2099 cloudy lt rain 18:00 50 33 13 88 (E) 2014 mstly cldy none 19:00 52 32 12 83 (E) 2276 mstly cldy none 20:00 48 32 22 62 (ENE) 2139 mstly clr none 21:00 47 32 14 85 (E) 2118 clear none 22:00 45 32 21 78 (ENE) 1920 clear none 23:00 44 32 21 70 (ENE) 1436 clear humid 00:00 45 32 12 75 (ENE) 1466 clear none 01:00 47 32 8 51 (NE) 1621 clear none 02:00 54 26 1 218 (SW) 2023 clear none 03:00 54 26 2 154 (SSE) 2330 clear none 04:00 52 28 4 260 (W) 1997 clear none 05:00 51 31 3 199 (SSW) 1899 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