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PTS
週日 21 2月, 2021 20:58
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2021 February 21 Sun - prominences on the SW solar limb
回覆: 2
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2021 February 21 Sun - prominences on the SW solar limb

2021 February 21 Sun - prominences on the SW solar limb This prominence is formed from part of the dark filament that has moved off-disc. Sunspot count: group=1, sunspots=2, R=12 For H-alpha images: Telescope: Lunt LS50T with B1200 blocking filter + 2X barlow Camera : ASI174MM exposure: 20 ms For Ca...
PTS
週日 21 2月, 2021 17:59
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2021 February 21 Sun - solar surface in H-alpha, with AR12802 and AR12803, and huge dark filaments
回覆: 5
觀看: 17

2021 February 21 Sun - solar surface in H-alpha, with AR12802 and AR12803, and huge dark filaments

2021 February 21 Sun - solar surface in H-alpha, with AR12802 and AR12803, and huge dark filaments AR12802 is located at (N18W68) this morning. There is not much visible feature. AR12803 is today located at (N21E49). Bright intense flares are present, so are filaments. The sunspots are not observed ...
PTS
週日 21 2月, 2021 15:30
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2021 February 21 Sun - solar surface in Ca-K, with AR12802 and AR12803
回覆: 3
觀看: 14

2021 February 21 Sun - solar surface in Ca-K, with AR12802 and AR12803

2021 February 21 Sun - solar surface in Ca-K, with AR12802 and AR12803 AR12802 is located at (N18W68) this morning. Not much is visible except for a few plages. AR12803 is today located at (N21E49). Bright flares are visible, so are plages. Only 2 sunspots are visible. sunspot count: group=1, sunspo...
PTS
週日 21 2月, 2021 13:00
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2021 February 21 Sun - solar surface in white-light, with AR12802 and AR12803
回覆: 1
觀看: 7

2021 February 21 Sun - solar surface in white-light, with AR12802 and AR12803

2021 February 21 Sun - solar surface in white-light, with AR12802 and AR12803 AR12802 is located at (N18W68) this morning. No sunspot is visible. Faculae are visible. AR12803 is today located at (N21E49). 2 sunspots are visible. The larger sunspot from yesterday is now a bipolar Class-C group, with ...
PTS
週六 20 2月, 2021 17:35
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2021 February 20 Sun - prominences on the NE solar limb
回覆: 2
觀看: 21

2021 February 20 Sun - prominences on the NE solar limb

2021 February 20 Sun - prominences on the NE solar limb Sunspot count: group=1, sunspots=4, R=14 For H-alpha images: Telescope: Lunt LS50T with B1200 blocking filter + 2X barlow Camera : ASI174MM exposure: 25 ms For Ca-K images: Telescope: Sharpstar AL-80 II, 8 cm f/6.25 APO refractor Camera : ASI17...
PTS
週六 20 2月, 2021 17:27
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2021 February 20 Sun - prominences on the SE solar limb
回覆: 2
觀看: 18

2021 February 20 Sun - prominences on the SE solar limb

2021 February 20 Sun - prominences on the SE solar limb Sunspot count: group=1, sunspots=4, R=14 For H-alpha images: Telescope: Lunt LS50T with B1200 blocking filter + 2X barlow Camera : ASI174MM exposure: 25 ms For Ca-K images: Telescope: Sharpstar AL-80 II, 8 cm f/6.25 APO refractor Camera : ASI17...

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