Subject: 3.5m Night Log 20250818 From: ajt@apo.nmsu.edu Date: Tue, 19 Aug 2025 13:38:54 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Monday, August 18, 2025 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- UW06 G.Khullar G.Khullar UW10 S.Hawley S.Hawley,L.Hebb AP01 S.Merkowitz R.McMillan ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- UW06 KOSMOS 21:16 23:00 UW10 ECHELLE 02:03 05:19 AP01 APOLLO 05:22 06:17 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- UW06/R 19:53 01:10 3.6 0 0 0 1.7 0.0 0 0 UW10/R 01:10 05:21 0.9 0 0 0 0.3 3.0 0 0 AP01/W 05:21 06:21 0 0 0 0 0.0 1.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: A.Townsend KOSMOS calstage got stuck on "Moving" at start of night and then again during obsrvations. I had to restart the optical all-sky camera, and skywatch was unresponsive so I had to physically unplug the USB in the Alcor computer. It froze again this morning. NICFPS hung up at checkout, I had to restart the NICFPS-ICS program. We had to wait for some radar and clouds at the start of the night, but once they passed we got on sky! For a little while, and then the clouds came back and we couldn't see anything. After a few hours the clouds and a little bit more radar cleared up again and we were able to observe the rest of the night, with minor trouble here and there due to passing clouds. We even got 5 reflectors with APOLLO this morning! ------- 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 -------------------------------------------------------------------------- 21:28 klow 510( 1455) 227 56 15.2 17.8 18.4 17.4 15.2 -- 1.16 02:09 ecamera 438( 233) 8 44 13.7 14.5 15.7 14.4 13.7 ND3 0.98 05:26 APOLLO 380( 1906) 92 29 13.9 13.2 13.9 13.2 13.4 530 1.40 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 64 53 5 251 (WSW) 671 cloudy none 17:00 63 55 1 249 (WSW) cloudy none 18:00 63 50 11 148 (SSE) cloudy none 19:00 61 56 9 143 (SE) cloudy humid 20:00 58 55 12 122 (ESE) cloudy humid 21:00 58 53 7 115 (ESE) mstly clr none 22:00 60 49 7 171 (S) mstly clr none 23:00 60 46 9 113 (ESE) 543 cloudy none 00:00 62 44 10 129 (SE) 500 cloudy none 01:00 57 50 3 158 (SSE) cloudy none 02:00 56 50 2 167 (SSE) ptly cldy none 03:00 57 49 4 189 (S) ptly cldy none 04:00 58 49 1 237 (WSW) ptly cldy none 05:00 57 50 1 237 (WSW) ptly cldy none 06:00 54 50 15 59 (ENE) ptly 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