2018 April 19 Sun - AR12706?

各類觀測太陽的儀器介紹及太陽攝影 Solarmax
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PTS
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註冊時間: 週日 28 10月, 2007 08:50
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2018 April 19 Sun - AR12706?

文章 PTS » 週四 19 4月, 2018 21:28

2018 April 19 Sun - AR12706?

On 2018 April 18, a minor eruption showed up on the NEE limb, indicating a possible AR is turning to the front. Today, a very active flare with many filaments comes to the front. In pseudo white light, several tiny spotlets are visible. NOAA has not yet assigned a number for this group.

As the slow motion is still unavailable, I have to continue with push or pull the telescope to put the image in field. This task becomes very tedious when working on close-up imaging, and I have to use very short exposures (thus high gain) to avoid blur images.

Telescope: AP Starfire EDT 155 mm f/9.
stopped to 80 mm (f/17.5) for disc images, with 4X telecentric lens (f/36) for closeups
filter: Solar Spectrum SO1.5/0.3A with CERF prefilter
Camera: ASI1600MM, 4656X3520 pixels (3.8 micron), binned 2
North is up, east is to the left.
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PTS
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文章: 6256
註冊時間: 週日 28 10月, 2007 08:50
來自: HK

Re: 2018 April 19 Sun - AR12706?

文章 PTS » 週四 19 4月, 2018 21:28

more images
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Kelvin W.
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註冊時間: 週三 11 1月, 2017 22:33

Re: 2018 April 19 Sun - AR12706?

文章 Kelvin W. » 週六 21 4月, 2018 18:07

[Good Job]

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