2019 November 18 Sun - AR12752
While the activity of AR12752 is not high today, a small sunspot with well-defined penumbra shows up.
Sunspot count: group=1, sunspot=1, R=11
Telescope: Sharpstar AL-80 II, 8 cm f/6.25 APO refractor
Camera : ASI1600MM Pro, not cooled.
Barlow: 2X barlow
focal length : 1000 mm f/12.5
Filters: Baader Solar Film 5.0+ Baader Planetarium G-band continuum.
approximately north is up, east to the left
2019 November 18 Sun - AR12752
2019 November 18 Sun - AR12752
- 附加檔案
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- Taken at 03:35:48 UTC
Exposure: 2.5 ms - Sun._00002.jpg (2 MiB) 已瀏覽 182 次
- Taken at 03:35:48 UTC
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- Taken at 03:35:48 UTC
Exposure: 2.5 ms
cropped 500x500
note that the umbra is not much larger than the granulations. - Sun._00002a.jpg (88.74 KiB) 已瀏覽 182 次
- Taken at 03:35:48 UTC
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- Taken at 03:39:32 UTC
Exposure: 2.5 ms - Sun._00083.jpg (2.04 MiB) 已瀏覽 182 次
- Taken at 03:39:32 UTC
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- Taken at 03:39:32 UTC
Exposure: 2.5 ms
cropped 500x500 - Sun._00083a.jpg (96.56 KiB) 已瀏覽 182 次
- Taken at 03:39:32 UTC
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