Apache Point Observatory 3.5m Telescope Night Log Tuesday, March 10, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- WY02 M.Moe C.Smith UW01 S.Hawley L.Hebb UW01 S.Hawley L.Hebb NM01 S.Monty S.Monty ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- WY02 ECHELLE --:-- --:-- UW01 ARCTIC --:-- --:-- UW01 ARCTIC --:-- --:-- NM01 ECHELLE 02:03 05:00 AP01 APOLLO --:-- --:-- PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- WY02/R 19:16 22:30 3.2 0 0 0 0.0 0.0 0 0 UW01/R 22:30 01:10 2.7 0 0 0 0.0 0.0 0 0 UW01/R 01:10 02:00 0 0 0 0 0.8 0.0 0 0 NM01/R 02:00 06:10 0 1.1 0 0 0.3 2.7 0 0 AP01/R 06:16 07:10 0.9 0 0 0 0.0 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: H.Abbot, R.McMillan Cloud and fog to start the night. Rain clouds cleared but still had intermittent fog through entirety of WY02. High humidty and cold telescope kept us closed through UW01. Humidity started dropping to safer levels about 20 minutes before NM01. High winds forced closure at 0500. Wasn't able to open for AP01. Had to restart the dataq once. Left the dome parked at Az -83 since the winds were so high 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 -------------------------------------------------------------------------- 02:17 ecamera 506( -288) 77 24 3.5 1.6 3.8 2.5 2.9 Clear 2.57 03:23 ecamera 498( -309) 65 37 3.4 1.6 3.3 2.5 2.9 Clear 2.05 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 35 31 16 224 (SW) cloudy lt rain 17:00 34 32 19 233 (SW) cloudy fog 18:00 34 32 16 267 (W) cloudy fog 19:00 33 32 8 259 (W) clear fog 20:00 32 32 13 300 (WNW) clear fog 21:00 33 32 9 351 (N) clear fog 22:00 34 32 4 352 (N) clear fog 23:00 36 32 8 323 (NW) clear humid 00:00 37 32 8 299 (WNW) clear humid 01:00 38 32 11 324 (NW) clear humid 02:00 38 32 15 7 (N) clear none 03:00 38 32 24 359 (N) clear none 04:00 38 30 24 14 (NNE) clear none 05:00 37 28 26 32 (NNE) clear none 06:00 37 28 14 11 (N) 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