Apache Point Observatory 3.5m Telescope Night Log Tuesday, June 30, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- UW08 S.Hawley L.Hebb AP01 S.Merkowitz R.McMillan, T.Sutherland UW10 A.Heinze A.Heinze ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- UW08 ECHELLE 20:55 01:00 AP01 APOLLO --:-- --:-- UW10 Echelle 01:35 05:25 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- UW08/R 20:24 01:10 0.5 0 0 0 0.3 4.0 0 0 AP01/R 01:10 02:10 0 1.0 0 0 0.0 0.0 0 0 UW10/R 02:10 05:50 0 0 0 0 0.0 3.7 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: J.Dembicky All of my Echelle images at checkout and IOL looked dark/bias looking. A few had very faint spectra. Looks like more the cal mirror didn't position correctly. I moved the mirror to sky and back to lamps and that fixed the issue. Delayed opening due to clouds and rain threat. I opened around 20:50. We had a small dust spike (~7K counts) around 21:50, it only lasted about 10 mins before it started dropping. I opted to stay open as the humidity wasn't too high. It climbed back up into the 5K range and then dropped. Apollo was not able to observe due to clouds and most likely GPS jamming (if the clouds weren't stopping them). They gave their time to the next program. No telescope issues tonight ------- 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 -------------------------------------------------------------------------- 21:05 ecamera 713( 726) 149 53 18.1 19.3 19.0 19.2 18.2 clear 1.25 22:01 ecamera 609( 554) 247 35 17.0 17.6 18.0 17.2 16.7 ND2 1.67 01:12 APOLLO 450( 2007) 30 37 13.8 14.0 14.5 13.7 14.3 -- 2.50 01:36 ecamera 578( 339) 13 57 14.1 14.0 14.6 14.1 14.4 clear 2.36 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 75 44 22 219 (SW) 1481 mstly cldy none 17:00 66 47 16 240 (WSW) 1742 mstly cldy none 18:00 67 46 9 264 (W) 1980 mstly cldy none 19:00 70 45 17 203 (SSW) 1748 mstly cldy none 20:00 66 42 12 215 (SW) 1428 ptly cldy none 21:00 65 33 17 266 (W) 1041 ptly cldy none 22:00 63 42 8 190 (S) 4733 ptly cldy dust 23:00 61 45 9 210 (SSW) 5116 ptly cldy none 00:00 56 49 14 142 (SE) 2531 ptly cldy none 01:00 57 47 13 156 (SSE) 1584 ptly cldy none 02:00 57 47 12 170 (S) 1795 ptly cldy none 03:00 58 46 16 182 (S) 1164 ptly cldy none 04:00 57 47 7 181 (S) 1295 clear none 05:00 56 48 10 190 (S) 1513 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: