Apache Point Observatory 3.5m Telescope Night Log Friday, May 22, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- OU03 G.Garcia G.Garcia OU02 G.Jewett G.Jewett ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- OU03 NICFPS 20:20 00:48 OU02 ARCTIC 01:00 05:30 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- OU03/R 20:09 01:10 0 0.4 0 0 0.0 4.6 0 0 OU02/R 01:10 05:51 0 0 0 0 4.1 0.6 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: T.Sutherland Following error occurred while doing test slews. Pointing was fine, so will rehome sec and tert tomorrow afternoon before checkout. Warning persisted throughout the night but functionally the telescope was behaving just fine, and good data was had. 2026-05-23 00:30:55 .tcc.0 0 tcc W Text="On Full Step Error: ?GOPOS one or more axes did not end on a full step 1, 1, 1" Did nicfps expose init to try and fix vertical lines in the darks taken. Closed at 22:40 due to dust. Reopened at 23:03 after determining it was a bad count reading that caused me to close. it was an easy night with great weather! ------- 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 -------------------------------------------------------------------------- 20:33 NICFPS 540( 1740) 210 70 12.7 15.0 14.9 14.8 12.9 MK-J 1.93 20:56 NA2gdr 47675(47675) 290 75 12.6 13.8 14.2 13.6 12.6 clear 0.95 23:11 NICFPS 600( 1662) 216 57 12.5 11.9 12.7 11.7 11.9 MK-J 0.71 01:05 arctic 505( 1252) 170 56 11.9 11.6 12.2 11.6 11.6 BG40 1.34 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 63 22 14 235 (SW) 1828 mstly clr none 17:00 63 22 23 213 (SSW) 1795 mstly clr none 18:00 58 21 13 231 (SW) 1791 mstly clr none 19:00 59 21 14 247 (WSW) 1550 clear none 20:00 55 22 12 238 (WSW) 1538 clear none 21:00 55 23 10 262 (W) 1779 clear none 22:00 55 25 11 246 (WSW) 1756 clear none 23:00 54 24 10 262 (W) 1973 clear none 00:00 55 20 11 263 (W) 1789 clear none 01:00 53 20 11 264 (W) 1833 clear none 02:00 53 22 9 286 (WNW) 1761 clear none 03:00 52 23 7 298 (WNW) 1784 clear none 04:00 53 24 10 322 (NW) 1818 clear none 05:00 53 24 10 316 (NW) 1886 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