Apache Point Observatory 3.5m Telescope Night Log Monday, December 29, 2025 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- NM07 W.Roberson W.Roberson,A.Abbas CU06 Z.Berta-Thompson A.Stephens ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- NM07 ECHELLE 21:00 00:04 CU06 KOSMOS 00:14 06:24 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- NM07/R 17:15 00:10 0 3.7 0 0 0.0 3.2 0 0 CU06/R 00:10 06:56 0 0 0 0 3.9 2.9 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: A.Townsend Tonight started off with clouds and fog and a tiny bit of wintry-mix-type precipitation, but the clouds and humidity cleared up enough that we were able to open at 21:00. We went from 100% humidity to 10% humidity! Though we had thin clouds the rest of the night they didn't bother us too much. ARCTIC still at temp despite pressure. 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 -------------------------------------------------------------------------- 21:08 ecamera 552( -301) -8 70 2.2 1.1 2.2 1.7 1.8 ND3 1.01 00:39 kosmos 375( 517) 108 63 2.5 0.9 2.0 2.0 2.2 -- 1.37 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 35 32 3 323 (NW) cloudy fog 17:00 36 32 1 341 (NNW) cloudy lt rain 18:00 37 27 10 34 (NE) cloudy humid 19:00 37 13 1 197 (SSW) 448 cloudy humid 20:00 36 8 1 326 (NW) 373 mstly cldy none 21:00 36 5 9 65 (ENE) 485 ptly cldy none 22:00 34 -3 12 77 (ENE) 300 mstly clr none 23:00 34 -6 16 77 (ENE) 96 mstly clr none 00:00 36 -13 11 84 (E) 92 mstly clr none 01:00 37 -15 9 86 (E) 120 mstly clr none 02:00 37 -14 1 112 (ESE) 82 mstly clr none 03:00 37 -14 2 126 (SE) 89 mstly clr none 04:00 38 -14 2 106 (ESE) 156 mstly clr none 05:00 40 -13 1 209 (SSW) 101 mstly clr none 06:00 40 -13 1 218 (SW) 52 mstly clr 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