Apache Point Observatory 3.5m Telescope Night Log Friday, March 27, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- CU01 Z.Berta-Thompson Z.Berta-Thompson,Class AP01 S.Merkowitz R.McMillan,T.Sutherland CU01 Z.Berta-Thompson Z.Berta-Thompson,Class ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- CU01 KOSMOS --:-- --:-- AP01 APOLLO --:-- --:-- CU01 KOSMOS 04:45 05:58 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- CU01/R 19:28 00:10 0 4.7 0 0 0.0 0 0 0 AP01/R 00:10 01:10 0 1 0 0 0.0 0 0 0 CU01/R 01:10 06:48 2.2 2.2 0 0 0 1.2 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: T.Sutherland Powercycled dataq at checkout. Again just before 11pm. Reset mirror covers during test slews. Smoke, humidity, and a nearby fog bank kept us closed at the start of the night. That fog bank right near the observatory kept the humidity high. Opened at 4:45am once the fog cleared and the humidity dropped juuuust enough to open. Humidity went back up just before 6am so I closed for the night. Did in dome runs for apollo tonight to test some things out. No problems tonight. ------- 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 -------------------------------------------------------------------------- 05:03 klow 362( 485) 278 62 0.5 0.5 4.3 0.4 0.4 -- 2.03 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 42 30 26 80 (E) mstly clr none 17:00 38 29 23 65 (ENE) mstly clr none 18:00 38 29 18 75 (ENE) mstly clr none 19:00 34 27 21 71 (ENE) mstly clr humid 20:00 31 28 24 75 (ENE) clear humid 21:00 32 29 23 74 (ENE) clear humid 22:00 31 28 23 78 (ENE) clear humid 23:00 31 26 15 77 (ENE) clear humid 00:00 29 25 23 73 (ENE) clear humid 01:00 29 27 18 79 (E) clear humid 02:00 30 30 17 71 (ENE) clear humid 03:00 32 29 12 82 (E) clear humid 04:00 32 29 7 99 (E) clear humid 05:00 33 29 7 93 (E) mstly clr humid 06:00 33 32 6 98 (E) mstly clr humid 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