Apache Point Observatory 3.5m Telescope Night Log Tuesday, May 19, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- NM07 T.McQuaid T.McQuaid UW01 P.Yoachim D.Meng, Z.Xu UW02 B.Benda B.Benda ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- NM07 ECHELLE 20:07 22:39 UW01 KOSMOS 22:40 01:00 UW02 ECHELLE 01:03 05:28 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- NM07/R 20:07 22:39 0 0 0 0 0.0 2.5 0 0 UW01/R 22:39 01:10 0 0 0 0 1.4 1.1 0 0 UW02/R 01:10 05:52 0 0 0 0 4.7 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: J.Dembicky Dust counts started coming up after midnight. I checked my car windshield and noticed pollen was settling on the windshield and car paint, so Dan and I set out a plate to start counting pollen. Pollen counts were elevated, about 80cts/hr on the couple of plates we set out. My cleaned windshield also seemed to be showing only a small accumulation. Dust was elevated for the 2nd half of the night. My TUI disconnected at 03:11 2026-05-20 09:11:01 .tcc.0 0 tcc i TCCPos=303.551955,69.180332,nan; AxePos=303.551973,69.180563,nan; ObjInstAng=27.38707345,0.00251733,5285985067.9541435; SpiderInstAng=-20.94457332,-0.00292342,5285985067.9541435 2026-05-20 09:11:01 .tcc.0 0 tcc i AxisCmdState=Tracking,Tracking,NotAvailable; AxisErrCode=OK,OK,NotAvailable; AxisNoTrack=FFT 2026-05-20 09:12:04 .tui 0 tui Text='No data seen in 60.0 seconds; testing the connection' 2026-05-20 09:12:04 .tui 0 tui Failed; Text="[Failure instance: Traceback (failure with no frames): : Connection to the other side was lost in a non-clean fashion.\n]" 2026-05-20 09:12:04 CmdStarted: .tcc 0 tcc 2026-05-20 09:12:05 APO.Jack-ObsA 203 KeyDispatcher f Aborted; Actor='hub'; Cmd='version'; Text="disconnected" 2026-05-20 09:12:18 .tui 0 tui Connecting 2026-05-20 09:12:18 .tui 0 tui Authorizing 2026-05-20 09:12:18 .tui 0 tui Authorizing; Text='nonce received' 2026-05-20 09:12:18 .tui 0 tui Connected; Text="you are 'APO.Jack-ObsA'" My other observers did not seem to disconnect so it was only ObsA. No telescope problems tonight. No Echelle IOL taken this morning since my observer was doing Echelle cals. Echelle LN2 nurse tank was reading 236# This is a little more than normal and the resevoir line was also frosted by the nurse tank valve. ------- 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 -------------------------------------------------------------------------- 20:25 ecamera 484( 288) 99 53 13.5 14.9 15.1 14.2 13.7 clear 1.13 22:54 kosmos 475( 1212) 145 47 14.6 13.3 13.9 13.2 13.8 -- 1.02 01:12 ecamera 487( 161) 328 54 12.3 12.1 12.8 12.2 12.2 ND3 0.88 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 64 16 18 234 (SW) 2074 clear none 17:00 65 17 17 235 (SW) 1703 clear none 18:00 65 17 22 211 (SSW) 1775 clear none 19:00 62 14 18 261 (W) 1435 mstly clr none 20:00 58 14 8 234 (SW) 1609 ptly cldy none 21:00 58 14 8 195 (SSW) 1626 ptly cldy none 22:00 57 12 13 219 (SW) 1633 ptly cldy none 23:00 56 11 8 160 (SSE) 1633 ptly cldy none 00:00 54 24 13 146 (SE) 2405 ptly cldy none 01:00 55 24 17 178 (S) 3312 ptly cldy none 02:00 52 27 15 144 (SE) 3750 mstly clr none 03:00 52 28 11 171 (S) 4047 mstly clr dust 04:00 52 31 11 174 (S) 4844 ptly cldy dust 05:00 51 32 12 159 (SSE) 5306 ptly cldy dust 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