Apache Point Observatory 3.5m Telescope Night Log Sunday, January 11, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- WY01 M.Brotherton M.Brotherton NM02 G.Rosales G.Rosales UW02 P.Yoachim D.Meng,Z.Xu AP01 S.Merkowitz R.McMillan,T.Sutherland ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- WY01 KOSMOS 17:52 19:48 NM02 ECHELLE 22:56 02:57 UW02 KOSMOS 03:03 05:47 AP01 APOLLO --:-- --:-- PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- WY01/R 17:25 20:05 0.3 0 0 0 2.4 0.0 0 0 NM02/R 20:05 00:10 2.9 0 0 0 1.2 0.0 0 0 NM02/R 00:10 03:00 0 0 0 0 1.7 1.1 0 0 UW02/R 03:00 05:57 0 0.2 0 0 0.0 2.7 0 0 AP01/R 05:57 06:57 0 1.0 0 0 0.0 0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: T.Sutherland Closed for wind gusts at 19:50, then opened again just before 23:00. Gave up for the night at 06:00 due to clouds. No telescope or instrument problems tonight. Dome parked facing west to melt remaining ice on enclosure. ------- 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 -------------------------------------------------------------------------- 18:13 klow 600( 716) 134 48 -1.4 0.1 0.0 -0.1 -1.4 -- 2.01 23:03 ecamera 464( -481) 164 63 -0.5 -0.9 -0.9 -1.3 -0.6 clear 1.07 03:14 kosmos 489( 558) -9 61 0.3 -0.6 -0.2 -1.0 -0.3 -- 0.90 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 34 10 2 178 (S) 212 clear none 17:00 31 6 1 144 (SE) 99 clear none 18:00 29 4 12 75 (ENE) 105 clear none 19:00 31 -7 15 115 (ESE) 47 clear none 20:00 32 -13 19 126 (SE) 30 clear none 21:00 31 -18 13 120 (ESE) 23 clear none 22:00 31 -18 18 125 (SE) 72 clear none 23:00 31 -18 13 128 (SE) 80 clear none 00:00 31 -18 8 127 (SE) 72 clear none 01:00 29 -21 8 124 (SE) 68 clear none 02:00 32 -18 11 111 (ESE) 50 clear none 03:00 32 -16 3 244 (WSW) 151 clear none 04:00 32 -18 11 111 (ESE) 59 clear none 05:00 32 -18 2 197 (SSW) 127 mstly cldy none 06:00 31 -20 6 96 (E) 160 mstly cldy 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