Apache Point Observatory 3.5m Telescope Night Log Sunday, February 01, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- NM05 A.Peck B.Roberson AP01 S.Merkowitz R.McMillan UW02 P.Yoachim Z.Liu NM06 W.Roberson E.Nielsen ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- NM05 ECHELLE -- -- AP01 APOLLO -- -- UW02 KOSMOS -- -- NM06 ECHELLE -- -- PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- NM05/R 17:45 23:10 0 5.4 0 0 0.0 0.0 0 0 AP01/R 23:10 00:10 0 1.0 0 0 0.0 0.0 0 0 UW02/R 00:10 02:40 0 2.5 0 0 0.0 0.0 0 0 NM06/R 02:40 06:49 0 4.1 0 0 0.0 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: H.Abbot,T.McQuaid We did not open tonight due to the remaining snow on the dome, mirror temperatures stayed above opening limits. Worked on obspec training, practiced a lot of instrument swaps at the beginning of the night. Dataq frozen, attempted restart at 22:30, however that did not work. PMSS remains unavailable in TCP/IP manager. Tried restarting TCP/IP Manager, was greeted with 'Error binding UDP Port 1234. IP Manager will not be able to continue'. The wiki went down intermittently throughout the night with a 503 error. Did Tpsec aux tank fill at 21:00. Did regular weekday morning fills at 04:00. Parked the dome due north with roof heaters on. ------- 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 -------------------------------------------------------------------------- ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 43 23 9 217 (SW) 1041 clear none 17:00 41 21 7 239 (WSW) 973 clear none 18:00 37 18 6 186 (S) 933 clear none 19:00 36 16 8 183 (S) 1270 clear none 20:00 36 15 7 187 (S) 1470 clear none 21:00 36 15 5 186 (S) 1372 clear none 22:00 36 14 5 196 (SSW) 1480 clear none 23:00 33 13 4 195 (SSW) 1852 clear none 00:00 34 18 6 235 (SW) 1496 clear none 01:00 35 18 6 221 (SW) 1583 clear none 02:00 33 19 4 252 (WSW) 1403 clear none 03:00 39 10 7 267 (W) 356 clear none 04:00 35 18 6 260 (W) 1458 clear none 05:00 35 18 4 267 (W) 1350 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