Apache Point Observatory 3.5m Telescope Night Log Thursday, May 21, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- BY03 E.Hintz S.Richmond,G.Steed,M.Gee,Z.DeLeeuw JH04 N.Myers P.McCreery ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- BY03 TripleSpec 00:15 01:00 JH04 ECHELLE 01:05 05:35 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- BY03/R 20:08 01:10 0 4.1 0 0 0.0 0.9 0 0 JH04/R 01:10 05:51 1.7 0 0 0 3 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: T.Sutherland Restarted gcam nubs at checkout. Some itty bitty spots of radar appeared nearby around 8pm and they decided to stick around for a while. Opened at 00:15. Closed up at 3:05am for dust. Reopened at 4:45am. Changed MOFF to 1 for sec and tert. Happy summer! No morning echelle iol, 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 -------------------------------------------------------------------------- 00:25 tcamera 396( 1270) 132 55 9.1 11.1 13.2 11.1 9.4 -- 1.58 01:10 ecamera 341( -76) -7 51 9.5 10.1 11.1 9.6 9.3 ND3 0.97 04:55 ecamera 490( -31) 44 73 8.7 8.2 9.3 8.1 8.2 clear 0.83 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 59 25 11 255 (WSW) 1216 ptly cldy none 17:00 64 26 17 227 (SW) 1177 ptly cldy none 18:00 63 23 13 269 (W) 1053 ptly cldy none 19:00 59 22 14 241 (WSW) 1310 ptly cldy none 20:00 55 22 15 263 (W) 1274 mstly clr none 21:00 53 24 17 209 (SSW) 1260 clear dust 22:00 51 32 13 189 (S) 6196 clear dust 23:00 50 32 14 213 (SSW) 4708 ptly cldy dust 00:00 49 33 14 190 (S) 2762 clear none 01:00 49 33 11 191 (S) 2057 clear none 02:00 48 33 11 190 (S) 1856 clear none 03:00 49 33 8 186 (S) 6130 clear dust 04:00 47 33 8 197 (SSW) 5077 clear dust 05:00 49 32 6 187 (S) 3735 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