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PTS
週六 18 11月, 2017 06:43
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Observing campaign on nova in Vela - ASASSN-17mt
回覆: 0
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Observing campaign on nova in Vela - ASASSN-17mt

AAVSO Alert Notice 606 Observing campaign on nova in Vela - ASASSN-17mt November 17, 2017 Event: Nova in Vela (ASASSN-17mt) and associated observing campaign Discovered by: ASAS-SN (K. Z. Stanek (Ohio State University) et al.; ATel #10772) Discovery magnitude: V=11.3, using data from the quadruple 1...
PTS
週五 17 11月, 2017 23:56
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2017 November 17 Sun - huge prominences on SWW limb
回覆: 1
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2017 November 17 Sun - huge prominences on SWW limb

2017 November 17 Sun - huge prominences on SWW limb Many prominence groups appear on the solar limb today, from the NE limb to SSE, and from NNW to SW. Here are images of the huge but very faint prominences on the SWW limb. Telescope: AP Starfire EDT 155 mm f/9. stopped to 50 mm (f/28) for disc imag...
PTS
週五 17 11月, 2017 23:35
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2017 November 17 Sun - prominences on SEE limb
回覆: 4
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2017 November 17 Sun - prominences on SEE limb

2017 November 17 Sun - prominences on SEE limb Many prominence groups appear on the solar limb today, from the NE limb to SSE, and from NNW to SW. Here are images of the prominences on the SEE limb, taken in 3 different exposures. This low prominence has its southern half "landed" on the solar disc....
PTS
週五 17 11月, 2017 23:14
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2017 November 17 Sun - prominences on NNW limb
回覆: 2
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2017 November 17 Sun - prominences on NNW limb

2017 November 17 Sun - prominences on NNW limb Many prominence groups appear on the solar limb today, from the NE limb to SSE, and from NNW to SW. Here are images of the prominences on the NNW limb Telescope: AP Starfire EDT 155 mm f/9. stopped to 50 mm (f/28) for disc images, with 4X telecentric le...
PTS
週五 17 11月, 2017 22:37
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2017 November 17 Sun - prominences on E limb
回覆: 2
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2017 November 17 Sun - prominences on E limb

2017 November 17 Sun - prominences on E limb Many prominence groups appear on the solar limb today, from the NE limb to SSE, and from NNW to SW. Here are images of the prominences on the E limb Telescope: AP Starfire EDT 155 mm f/9. stopped to 50 mm (f/28) for disc images, with 4X telecentric lens (...
PTS
週五 17 11月, 2017 22:11
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2017 November 17 Sun - AR12687
回覆: 3
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2017 November 17 Sun - AR12687

2017 November 17 Sun - AR12687 The 2 leading small sunspots have vanished, and the main sunspot has broken into many smaller umbrae. The N-S elongated bright flare persists just on the W of the main sunspot. The flares and filaments to the west of the main sunspot are complex, and the filaments are ...

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