Apache Point Observatory 3.5m Telescope Night Log Saturday, August 29, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- NM02 S.Monty S.Monty AP01 S.Merkowitz R.McMillan,T.Sutherland UW01 P.Yoachim D.Meng,Z.Xu UW07 S.Hawley L.Hebb ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- NM02 ECHELLE 21:30 00:04 AP01 APOLLO 00:10 01:04 UW01 KOSMOS 01:09 03:30 UW07 ECHELLE 03:52 06:02 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- NM02/R 19:40 00:10 0.6 1.2 0 0 0 2.7 0 0 AP01/R 00:10 01:10 0 0 0 0 0.0 1.0 0 0 UW01/R 01:10 03:49 0 0 0 0 0.0 2.6 0 0 UW07/R 03:49 06:28 0 0 0 0 0.0 2.7 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: T.Sutherland NA2-rotator had to be reset at the start of the night (thanks Bill). Motion error in Az as soon as I started my first test slew after rotator was reset (occurred at 19:40) One set of 3 flats, comps, and biases were taken. IOL at 01:00 bc cals were being taken in the morning. A nearby storm kept us closed at the start of the night. Opened just before 21:30. Clouds rolled in just as UW01 was getting on sky. UW01 called it at 03:30 due to clouds, but telescope remained open. UW07 logged in at the scheduled time. User stopped a kosmos cal, had to recover with conndev and startnubs. ------- 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 -------------------------------------------------------------------------- 21:36 ecamera 496( 585) 262 24 18.7 20.4 20.7 20.4 18.8 ND1 1.58 00:16 APOLLO 400( 2062) 71 52 16.8 16.9 17.7 16.8 16.8 -- 1.70 01:25 kosmos 450( 1325) 53 43 16.6 16.2 16.9 16.2 16.3 -- 1.55 03:55 ecamera 390( 250) -4 80 17.4 16.4 16.8 16.7 17.2 clear 1.26 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 72 46 6 213 (SSW) 1621 ptly cldy none 17:00 73 48 5 207 (SSW) 1661 ptly cldy none 18:00 72 46 9 221 (SW) 1808 ptly cldy none 19:00 70 46 7 191 (S) 1911 ptly cldy none 20:00 67 43 9 182 (S) 1946 mstly clr none 21:00 66 43 17 146 (SE) 1833 mstly clr none 22:00 65 43 19 150 (SSE) 1760 mstly clr none 23:00 64 42 20 156 (SSE) 1762 mstly clr none 00:00 63 43 17 139 (SE) 1938 mstly clr none 01:00 62 43 17 147 (SSE) 1909 mstly cldy none 02:00 62 42 16 151 (SSE) 1799 mstly cldy none 03:00 61 44 14 153 (SSE) 1707 mstly cldy none 04:00 64 38 11 184 (S) 1307 ptly cldy none 05:00 62 43 14 202 (SSW) 1593 ptly cldy none 06:00 62 43 9 190 (S) 1677 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: 3.2.2