Apache Point Observatory 3.5m Telescope Night Log Thursday, June 25, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- WY02 C.Kobulnicky N.Patten UW08 S.Hawley S.Hawley,L.Hebb ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- WY02 ECHELLE -- -- WY02 KOSMOS -- -- UW08 ECHELLE 04:40 05:18 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- WY02/R 20:24 01:10 0 4.8 0 0 0.0 0.0 0 0 UW08/R 01:10 05:48 2.1 2.0 0 0 0.6 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: T.McQuaid Heavy cloud cover and intermittent rain showers kept us closed for the almost the whole night. The clouds overhead started to thin past 03:00 but there were enough nearby radar returns to keep us closed until 04:40 when I opened. Seeing was quite poor however and there were still a few thin clouds. Thicker clouds coming in from the west forced us closed again at 05:18. ------- 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 -------------------------------------------------------------------------- 05:01 ecamera 450( 330) -37 82 15.5 16.8 19.4 16.6 15.7 ND4 3.30 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 76 40 15 261 (W) 1767 mstly cldy none 17:00 73 36 20 278 (W) 1112 mstly cldy lt rain 18:00 72 39 10 247 (WSW) 2230 mstly cldy none 19:00 72 39 7 265 (W) 2597 cloudy lt rain 20:00 67 42 10 35 (NE) 1486 cloudy none 21:00 65 42 8 14 (NNE) 1268 cloudy lt rain 22:00 63 42 9 281 (W) 662 cloudy lt rain 23:00 63 41 10 114 (ESE) 652 cloudy none 00:00 62 42 10 5 (N) 674 cloudy none 01:00 65 41 6 263 (W) 592 cloudy lt rain 02:00 64 39 8 269 (W) 490 cloudy none 03:00 63 40 9 268 (W) 626 mstly cldy none 04:00 62 41 6 274 (W) 734 ptly cldy none 05:00 60 42 6 347 (NNW) 650 ptly cldy 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: