Subject: 3.5m Night Log 20231007 From: mcmillan@apo.nmsu.edu Date: Sun, 8 Oct 2023 13:03:36 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Saturday, October 07, 2023 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- UW07 K.Suberlak K.Suberlak WY02 M.Brotherton M.Brotherton ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- UW07 KOSMOS 19:46 04:30 WY02 TSPEC 04:48 06:25 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- UW07/R 18:49 04:54 0 0 0 0.2 6.5 3.6 0 0 WY02/R 04:54 06:54 0 0 0 0 0.0 2.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: R.McMillan Aside from a few ororgraphic clouds right around sunset, the night was clear. Moderate to poor seeing at the start of the night improved later on although I mostly focused on the fly so I didn't get real recordings of the focus. The KOSMOS disperser wheel got stuck twice. Once at rotator position 51 and once at 28. Both times when moving from blue (3) to red (6). It apparently chose to move in the negative direction, and got stuck between position 1 and 6, nearly all the way to the destination. I suggested the observer try going from blue to empty4 to red, forcing the wheel to move in the positive direction instead, but there was little time for testing after that. ------- FAILURE LOG ------- FAILURE MODE TIME PROG INSTR TI/SHU START FINISH DESCRIPTION ---------------------------------------------------------------------- UW07 K I/H 02:55 03:00 KOSMOS disperser wheel stuck UW07 K I/H 04:13 04:18 KOSMOS disperser wheel stuck ---------------- FOCUS LOG --------------- Time Instrument Focus Az El Temp Strc Prim Sec Air filt FWHM -------------------------------------------------------------------------- 18:54 kosmos 13( 887) 0 58 6.8 11.1 10.6 11.5 8.2 - 1.54 03:55 tcamera 333( 1164) -1 63 6.1 6.0 6.7 5.9 6.1 Ks 1.17 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 54 39 7 213 (SSW) 851 ptly cldy none 17:00 52 38 5 256 (WSW) 819 ptly cldy none 18:00 51 37 6 228 (SW) 914 mstly clr none 19:00 47 37 8 144 (SE) 864 mstly clr none 20:00 44 36 8 122 (ESE) 830 clear none 21:00 44 35 11 109 (ESE) 838 clear none 22:00 44 34 7 119 (ESE) 848 clear none 23:00 44 32 8 145 (SE) 817 clear none 00:00 46 37 4 213 (SSW) 1118 clear none 01:00 46 37 3 238 (WSW) 1208 clear none 02:00 46 38 3 256 (WSW) 1226 clear none 03:00 45 38 2 231 (SW) 1313 clear none 04:00 45 40 1 231 (SW) 1363 clear none 05:00 43 38 2 341 (NNW) 1355 clear none 06:00 44 44 6 15 (NNE) 1248 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: 3.1.3beta0