2017 December 02 Sun - AR12689
Almost all of AR12689 is now on the backside, leaving just a broken filament.
The Sun again is featureless either in white light or H-alpha.
Telescope: AP Starfire EDT 155 mm f/9.
stopped to 50 mm (f/28) for disc images, with 4X telecentric lens (f/36) for closeups
filter: Solar Spectrum SO1.5/0.3A with CERF prefilter
Camera: Imperx 4M15
2017 December 02 Sun - AR12689
2017 December 02 Sun - AR12689
- 附加檔案
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- Featureless Sun.
- 20171202100731775.jpg (128.82 KiB) 已瀏覽 270 次
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- AR12689-20171202102849684.jpg (131.67 KiB) 已瀏覽 270 次
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- AR12689-20171202103539568.jpg (133.46 KiB) 已瀏覽 270 次
![[Good Job]](./images/smilies/onion_d5f02ecd.gif "Good Job")
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