Subject: 3.5m Night Log 20250906 From: ajt@apo.nmsu.edu Date: Sun, 7 Sep 2025 12:20:00 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Saturday, September 06, 2025 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- AP02 S.Merkowitz R.McMillan UW01 S.Hawley L.Hebb UW10 S.Hawley S.Hawley,L.Hebb ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- AP02 APOLLO --:-- --:-- UW01 ARCTIC --:-- --:-- UW10 ECHELLE 04:53 05:50 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- AP02/W 19:29 21:25 0 1.9 0 0 0.0 0.0 0 0 UW01/R 21:25 01:10 0 3.8 0 0 0.0 0.0 0 0 UW01/R 01:10 01:35 0 0.4 0 0 0.0 0.0 0 0 UW10/R 01:35 06:34 0 3.2 0 0 0.0 1.8 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: A.Townsend Rain and fog! We weren't able to open until the very end of the night when the weather system finally passed us by. Power cycled dataq on hub35m because it was frozen once at the start and once towards the end of the night. Alcor frozen, I had to reconnect the USB manually to restart. ------- 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 -------------------------------------------------------------------------- 05:02 ecamera 337( -44) 222 64 11.5 11.1 12.6 10.9 11.1 ND1 0.66 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 58 29 7 187 (S) 367 cloudy none 17:00 55 25 8 110 (ESE) 239 cloudy lt rain 18:00 54 33 2 240 (WSW) 294 cloudy rain 19:00 52 36 5 169 (S) 454 cloudy fog 20:00 52 33 3 104 (ESE) 457 cloudy fog 21:00 53 39 2 235 (SW) 319 mstly cldy humid 22:00 52 38 7 222 (SW) 275 mstly cldy humid 23:00 52 38 4 259 (W) 224 mstly cldy humid 00:00 51 37 6 254 (WSW) 164 cloudy humid 01:00 53 34 5 266 (W) 130 cloudy humid 02:00 54 34 8 325 (NW) 178 cloudy humid 03:00 53 34 9 301 (WNW) 140 cloudy lt rain 04:00 52 34 4 349 (N) 158 cloudy humid 05:00 53 33 5 288 (WNW) 186 clear humid 06:00 52 34 5 333 (NNW) 181 clear humid 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