香港天文論壇

2020 June 09 Sun - AR12764 and AR12765 AR12764 has its activities much reduced in the past 24 hours. AR12765 has been very active in the past day, producing bright flares and dark filaments. The huge dark filament has broken up. There is only 1 main sunspot, but there are about 10 umbral dots. Sunsp...

2020 June 08 Sun - AR12764 and AR12765 AR12764 has its activities much reduced today. AR12765 has been very active in the past 24 hours, producing bright flares and dark filaments. A huge dark filament runs southward. AT least 8 sunspots are visible. Sunspot count: group=1, sunspot=8, R=18 H-alpha i...

2020 June 07 Sun - AR12764 and AR12765 AR12764 has been less active today. AR12765 has been very active in the past 24 hours, producing bright flares and dark filaments. 6 sunspots are visible. Sunspot count: group=1, sunspot=6, R=16 H-alpha image from Learmonth, taken at 01:00 UTC Magnetogram and w...

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2020 June 4

Spiders along Lugard Road on The Peak

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2020 June 05 Sun in H-alpha - AR12764 and AR12765 AR12764 is very large, with plages and filaments but no sunspot. AR12765 has been very active in flares and filaments. Sunspot count: group=1. sunspots=2, R=12 Telescope: Lunt LS35T with B600 blocking filter Camera : ASI174MM exposure: 0.4 ms Images ...

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2020 June 05 Sun - AR12765 AR12765 has now moved completely on disc. A large sunspot is on the lead, and a very small sunspots is close to the NE of the main sunspot. The sunspots are embedded in a complex faculae. Sunspot count: group=1. sunspot=2, R=12 Telescope: Celestron C5, 127mm f/10 Schmidt-C...

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