----------------------------------------------------------------------------- Mauna Loa Solar Observatory Observer's Log ----------------------------------------------------------------------------- Fri Aug 21 16:59:15 GMT 2026 Year:26 Doy:233 Observer: mcotter Weather COMMENT BY mcotter: Fri Aug 21 17:01:41 GMT 2026 MLSO Current Weather Timestamp (UTC): 2026-08-21 16:56:00 Temperature : 48.09 deg F Dew Point : 23.66 deg F Pressure : 681.96 mbar Wind Speed : 11.63 mph Wind Direction : 169.4 deg Skies: Cumulus clouds scattered across the horizon in all directions with clear skies overhead. Dark blue gray inversion layer visible on the horizon above Haleakala. The air appears slightly hazy. Moderate wind from the southeast. ___end___ GENERAL COMMENT BY mcotter: Fri Aug 21 17:01:53 GMT 2026 Opened windows upstairs ___end___ GENERAL COMMENT BY mcotter: Fri Aug 21 17:01:59 GMT 2026 Dome open ___end___ ** KCOR PM mcotter ** : Fri Aug 21 17:02:06 GMT 2026 Blew off Kcor O1 ___end___ Fri Aug 21 17:12:08 GMT 2026 Kcor Focus/alignment program exited. Focus manually set to 134.5 from 132.5. When starting the Focus routine the occulter was leaking light, so I manually adjusted the Guider Zero-Point Offset t the following: X(RA): -19 Y(Dec): 22 After this adjustment the occulter centered properly and the Focus routine ran as normal. KCOR BY mcotter: Fri Aug 21 17:15:43 GMT 2026 Kcor: The Kcor instrument is now observing. Synoptic images look good. ___end___ CME Retraction COMMENT BY mcotter: Fri Aug 21 17:53:20 GMT 2026 17:25:02 271.50 deg CME has been retracted by the observer. I have been watching this very bright prominence since starting observations this morning, but I am not convinced that it is an actual CME at this time. I will continue to monitor this prominence and make updates as necessary. ___end___ Weather COMMENT BY mcotter: Fri Aug 21 18:43:26 GMT 2026 MLSO Current Weather Timestamp (UTC): 2026-08-21 18:38:00 Temperature : 54.75 deg F Dew Point : 40.2 deg F Pressure : 682.51 mbar Wind Speed : 10.96 mph Wind Direction : 129.3 deg Skies: Orographic clouds are starting to come up over Maunaloa from the southeast at this time. ___end___ Weather COMMENT BY mcotter: Fri Aug 21 20:00:31 GMT 2026 MLSO Current Weather Timestamp (UTC): 2026-08-21 19:56:00 Temperature : 59.38 deg F Dew Point : 34.89 deg F Pressure : 682.79 mbar Wind Speed : 10.74 mph Wind Direction : 118.1 deg Skies: Orographic clouds have made there way up the western slope of Maunaloa and are now getting close to the observatory area. ___end___ ** KCOR PROBLEM REPORTED BY mcotter ** : Fri Aug 21 20:16:59 GMT 2026 Kcor circular acquisition error: The error occurred at approximately 19:43 UT to 20:12 UT. ___end___ Fri Aug 21 20:18:22 GMT 2026 KCOR Start Calibration script: c:\kcor\mlso-calibration22deg-20171025.ini Fri Aug 21 20:33:16 GMT 2026 KCOR End Calibration Script CME Retraction COMMENT BY mcotter: Fri Aug 21 20:57:14 GMT 2026 19:35:30 UT 271.50 deg CME has been retracted by the observer. This CME is in the same exact spot as a CME that was automatically reported earlier today at 17:25:02 UT, which was also retracted. At this time I cannot with absolute clarity confirm that an actual CME is taking place. This area of the Sun is quite active and currently shows bright prominences in this location. ___end___ Weather COMMENT BY mcotter: Fri Aug 21 21:00:08 GMT 2026 MLSO Current Weather Timestamp (UTC): 2026-08-21 20:56:00 Temperature : 56.89 deg F Dew Point : 43.75 deg F Pressure : 683.15 mbar Wind Speed : 3.8 mph Wind Direction : 148.7 deg Skies: There are Orographic clouds encroaching on the area of the observatory from the north and west, with additional Orographic clouds present to the south over the crest of Maunaloa. Aerosols are getting heavy. ___end___ Weather COMMENT BY mcotter: Fri Aug 21 21:36:50 GMT 2026 MLSO Current Weather Timestamp (UTC): 2026-08-21 21:29:00 Temperature : 61.07 deg F Dew Point : 43.12 deg F Pressure : 683.04 mbar Wind Speed : 8.5 mph Wind Direction : 359.0 deg Skies: Clouds have moved into the viewing area. ___end___ KCOR COMMENT BY mcotter: Fri Aug 21 21:37:26 GMT 2026 Kcor: Observations have stopped due to poor sky conditions. ___end___ GENERAL COMMENT BY mcotter: Fri Aug 21 21:45:33 GMT 2026 The dome and dome windows have been closed due to poor sky conditions. The sky has quickly become overcast with gray Orographic clouds from the west. ___end___ Weather COMMENT BY mcotter: Fri Aug 21 22:00:56 GMT 2026 MLSO Current Weather Timestamp (UTC): 2026-08-21 21:56:00 Temperature : 56.95 deg F Dew Point : 48.67 deg F Pressure : 682.87 mbar Wind Speed : 8.5 mph Wind Direction : 332.2 deg Skies: The sky is now mostly overcast with wisps of fog blowing through the area of the observatory from the northwest. ___end___ KCOR COMMENT BY KCOR: Fri Aug 21 22:23:52 GMT 2026 KCOR file transfer report KCor created 1041 .bin files 1039 .fts files NOTICE ? 2 .bin file(s) with no matching .fts: 20260821_201118_kcor.bin 20260821_213612_kcor.bin Remote site is complete ? no rsync required. ___end___ BY mcotter: Sat Aug 22 01:33:48 GMT 2026 End Of Day: I thought that the sky was going to clear up this afternoon, but unfortunately it did not. Good observations this morning until late morning when clouds came in and sky conditions were too poor to observe. ___end___ Logger COMMENT BY mcotter: Sat Aug 22 01:33:55 GMT 2026 Log closed ONSITE STAFF: mcotter ___end___