Apache Point Observatory 3.5m Telescope Night Log Thursday, March 12, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- UW10 P.Szkody P.Szkody NM01 S.Monty S.Monty AP01 S.Merkowitz R.McMillan ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- UW10 KOSMOS --:-- --:-- NM01 ECHELLE 03:45 06:07 AP01 APOLLO 06:09 07:09 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- UW10/R 19:18 01:10 5.9 0 0 0 0.0 0.0 0 0 NM01/R 01:10 06:08 2.7 0 0 0 0.1 2.1 0 0 AP01/R 06:08 07:08 0 0 0 0 0.0 1.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: H.Abbot,J.Dembicky Dust too high to open for UW10. Counts finally went down to safe levels around 0330, waited until 0345 to open. 2 Dataq restarts in the first few hours of the night. Otherwise was a pretty normal night, everything went smoothly. ------- 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 -------------------------------------------------------------------------- 04:07 ecamera 325( -303) 107 62 6.9 5.8 7.0 5.7 6.2 Clear 1.32 05:33 ecamera 425( -183) -79 49 7.0 6.0 6.8 6.0 6.6 Clear 1.29 06:13 APOLLO 450( 1647) 34 22 7.5 6.0 6.8 6.1 6.8 530 1.90 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 48 16 12 330 (NNW) 3911 clear dust 17:00 48 15 14 306 (NW) 3051 clear dust 18:00 48 19 9 303 (WNW) 4405 clear dust 19:00 46 18 10 270 (W) 5115 clear dust 20:00 44 21 10 261 (W) 6357 clear dust 21:00 43 23 11 260 (W) 5666 clear dust 22:00 43 24 11 258 (WSW) 6003 clear dust 23:00 44 24 12 268 (W) 6165 clear dust 00:00 44 23 14 270 (W) 5213 clear dust 01:00 44 24 15 298 (WNW) 5255 clear dust 02:00 44 24 7 273 (W) 4934 clear dust 03:00 44 24 8 0 (N) 4665 clear dust 04:00 45 17 16 5 (N) 2512 clear none 05:00 45 12 19 29 (NNE) 1055 clear none 06:00 45 9 13 14 (NNE) 433 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