Apache Point Observatory 3.5m Telescope Night Log Thursday, March 26, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- CU01 Z.Berta-Thompson Z.Berta-Thompson,Class UV05 A.Verbiscer A.Verbiscer ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- CU01 EYEPIECE 19:28 20:55 CU01 KOSMOS 21:08 01:04 UV05 ARCTIC 01:16 05:58 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- CU01/R 19:28 01:10 0 0 0 0 0.0 5.7 0 0 UV05/R 01:10 06:49 1 0 0 0 1.9 2.8 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: T.Sutherland Powercycled dataq at checkout, and again just before 4am. Eyepiece with the class was great! We got to see some planets, nebulae, and the moon! I <3 space Temp dropped rapidly in B half, and seeing went to 4". Dust also decided to spike at 5:30am. Closed just before 6am for dust. Overall a good night, morning weather/seeing notwithstanding. No telescope or instrument problems. ------- 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 -------------------------------------------------------------------------- 21:23 klow 499( 1296) 12 80 14.6 15.0 15.8 14.7 14.5 -- 1.88 01:22 arctic 480( 1344) -5 55 14.4 14.1 14.7 14.3 14.5 SDSS_r 1.36 05:29 arctic 487( 1148) -36 33 6.6 9.3 10.9 9.9 7.6 SDSS_r 4.02 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 69 20 19 236 (SW) 440 clear none 17:00 68 19 13 260 (W) 433 clear none 18:00 66 17 14 267 (W) 529 clear none 19:00 64 15 14 265 (W) 515 clear none 20:00 61 11 12 265 (W) 666 clear none 21:00 59 10 16 242 (WSW) 1047 clear none 22:00 59 9 9 246 (WSW) 1001 clear none 23:00 58 9 7 268 (W) 815 clear none 00:00 59 9 6 7 (N) 883 clear none 01:00 59 9 20 35 (NE) 639 clear none 02:00 59 9 19 56 (NE) 649 clear none 03:00 55 6 23 69 (ENE) 656 clear none 04:00 56 7 8 78 (ENE) 537 clear none 05:00 50 9 18 66 (ENE) 1482 clear dust 06:00 40 28 23 76 (ENE) 5603 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: 3.1.8