Subject: 3.5m Night Log 20251124 From: ajt@apo.nmsu.edu Date: Tue, 25 Nov 2025 13:44:20 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Monday, November 24, 2025 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- AP01 S.Merkowitz T.Sutherland,R.McMillan UW02 P.Yoachim Z.Liu,Z.Xu GS04 S.Lepine Z.Way WY02 M.Moe C.Smith ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- AP01 APOLLO 17:07 18:06 UW02 KOSMOS 18:12 20:59 GS04 ECHELLE 21:04 00:02 WY02 ECHELLE 00:02 01:40 WY02 ECHELLE 02:48 06:00 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- AP01/R 17:07 18:07 0 0 0 0 0.0 1.0 0 0 UW02/R 18:07 21:10 0 0 0 0 0.5 2.5 0 0 GS04/R 21:10 00:10 0 0 0 0 3.0 0.0 0 0 WY02/R 00:10 06:34 1.1 0 0 0 5.3 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: A.Townsend Restarted frozen dataq at start of night. IOL script did not successfully turn off ThAr lamp. Motion error 73.1 altitude at 21:04 slewing downward, first slew after an inst change. Closed up 01:40 due to humidity, reopened about an hour later. For the most part we had clear skies and decent seeing but we had elevated humidity most of the night and some wind gusts over 30mph at the end of the night. ------- 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 -------------------------------------------------------------------------- 17:17 APOLLO 512( 1632) -37 21 2.0 4.4 4.2 4.2 2.4 530 1.70 18:26 kosmos 480( 666) 17 51 2.2 1.7 3.0 2.2 2.2 -- 1.04 21:12 ecamera 484( -378) 122 66 1.8 0.8 2.0 1.2 1.4 Clear 0.66 00:07 ecamera 483( -366) 301 30 1.0 0.5 1.4 0.9 1.1 Clear 1.13 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 39 28 10 4 (N) clear none 17:00 36 26 19 21 (NNE) 118 clear none 18:00 36 21 18 22 (NNE) 137 clear none 19:00 36 22 16 0 (N) 147 clear none 20:00 36 25 15 359 (N) 211 clear none 21:00 35 27 14 12 (NNE) clear none 22:00 35 28 7 350 (N) clear none 23:00 35 28 16 357 (N) clear none 00:00 34 28 9 350 (N) clear none 01:00 33 28 8 359 (N) mstly clr none 02:00 35 26 13 10 (N) mstly clr none 03:00 35 24 16 24 (NNE) clear none 04:00 36 19 23 23 (NNE) 119 clear none 05:00 36 16 17 26 (NNE) 183 clear none 06:00 36 12 15 12 (NNE) 94 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: 3.1.8