Apache Point Observatory 3.5m Telescope Night Log Monday, November 02, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- OU01 M.Kilic G.Jewett JH02 M.Karmen M.Karmen AP02 S.Merkowitz R.McMillan,T.Sutherland ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- OU01 ARCTIC 17:20 17:44 OU01 ARCTIC 18:26 22:49 JH02 ARCTIC 00:42 03:30 AP02 APOLLO 03:34 05:42 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- OU01/R 17:20 00:10 2.0 0 0 0 4.8 0.0 0 0 JH02/R 00:10 03:20 0.5 0 0 0 0.1 2.5 0 0 AP02/R 03:20 06:14 0 0 0 0 0.0 2.9 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: H.Abbot Restart gcam nubs and reset mirror covers during afternoon checkout. Otherwise, telescope and instruments were well behaved all night. Even the Arctic LL quad was working normally! Optidew was pegged at >99% humidity all night, which definitely was not the case. Clear night with poor seeing and a couple humidity spikes. Opened up on time for skyflats, but humidity lingered and forced closure soon after. Was able to open up again aroud 1830, but humidity came back and closed us up again around 2250. Finally dropped again around 0040 and conditions stayed observable for the rest of the night. AP02 donated 10 mins to JH02 to diagnose GPS clock issues. Set MOFF=0 for both sec and tert 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 -------------------------------------------------------------------------- 18:31 arctic 494( 810) 51 56 3.1 4.5 6.7 3.9 3.2 BG40 2.15 00:46 arctic 449( 574) 10 57 1.4 0.5 1.2 0.8 1.0 SDSS_g 1.74 03:38 APOLLO 350( 1263) 81 35 2.6 0.7 1.7 1.3 2.0 530 2.00 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 42 37 23 300 (WNW) clear humid 17:00 40 37 16 277 (W) mstly clr humid 18:00 38 36 19 308 (NW) mstly clr none 19:00 38 29 6 8 (N) clear none 20:00 35 29 16 5 (N) clear none 21:00 35 28 16 6 (N) clear none 22:00 35 30 23 347 (NNW) clear humid 23:00 34 31 17 29 (NNE) clear humid 00:00 34 31 25 18 (NNE) clear humid 01:00 35 26 20 19 (NNE) clear none 02:00 35 25 14 19 (NNE) 26 clear none 03:00 35 25 15 20 (NNE) 19 clear none 04:00 37 22 26 21 (NNE) 16 clear none 05:00 36 21 20 18 (NNE) 24 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: 3.2.2