2021 April 21 Sun - solar surface in Ca-K, with AR12815, AR12816, AR12817 and AR12818
No image of AR12815 is taken.
AR12816 is today located at (S24E08). This group has been very active in the past 24 hours. At least 8 sunspots are visible, many come with penumbrae. The plages and large sunspots are in the following group.
AR12817 is located at (N18W60). This Class-D group has at least 8 sunspots. The leading sunspot seems to be split, maybe by a light-bridge, C1.5 and C1.9 flares are observed.
AR12818 is near the SE limb, at (S17E66). A large sunspot with penumbrae is visible. The bright plages are mostly to the south.
sunspot count: group=3, sunspot=17, R=47
Telescope: Sharpstar AL-80 II, 8 cm f/6.25 APO refractor
Camera : ASI174MM
focal length : 500 mm f/6.25
filter: Lunt Ca-K Module B1200
approximately north is up, east to the left.
2021 April 21 Sun - solar surface in Ca-K, with AR12815, AR12816, AR12817 and AR12818
2021 April 21 Sun - solar surface in Ca-K, with AR12815, AR12816, AR12817 and AR12818
- 附加檔案
-
- cak-disc-111056.png (146.19 KiB) 已瀏覽 110 次
-
- cak-disc-111111.png (402.85 KiB) 已瀏覽 110 次
-
- cak-AR12816-111628.png (132.55 KiB) 已瀏覽 110 次
-
- cak-AR12816-111737.png (126.48 KiB) 已瀏覽 110 次
-
- cak-AR12816-111954.png (131.77 KiB) 已瀏覽 110 次
-
- cak-AR12816-112243.png (324.02 KiB) 已瀏覽 110 次
-
- cak-AR12816-112634.png (161.98 KiB) 已瀏覽 110 次
-
- cak-AR12816-112727.png (371 KiB) 已瀏覽 110 次
-
- cak-AR12816-112854.png (378.4 KiB) 已瀏覽 110 次
-
- cak-AR12816-112908.png (357.3 KiB) 已瀏覽 110 次
Re: 2021 April 21 Sun - solar surface in Ca-K, with AR12815, AR12816, AR12817 and AR12818
Images of AR12817
- 附加檔案
-
- cak-AR12817-111648.png (82.89 KiB) 已瀏覽 109 次
-
- cak-AR12817-111755.png (89.42 KiB) 已瀏覽 109 次
-
- cak-AR12817-112031.png (94 KiB) 已瀏覽 109 次
-
- cak-AR12817-112221.png (278.43 KiB) 已瀏覽 109 次
-
- cak-AR12817-112504.png (175.58 KiB) 已瀏覽 109 次
-
- cak-AR12817-112543.png (434.66 KiB) 已瀏覽 109 次
-
- cak-AR12817-112745.png (315.24 KiB) 已瀏覽 109 次
-
- cak-AR12817-112838.png (406.05 KiB) 已瀏覽 109 次
Re: 2021 April 21 Sun - solar surface in Ca-K, with AR12815, AR12816, AR12817 and AR12818
Images of AR12818
- 附加檔案
-
- cak-AR12818-111610.png (91.47 KiB) 已瀏覽 109 次
-
- cak-AR12818-111720.png (110.84 KiB) 已瀏覽 109 次
-
- cak-AR12818-112018.png (306.32 KiB) 已瀏覽 109 次
-
- cak-AR12818-112209.png (302.46 KiB) 已瀏覽 109 次
-
- cak-AR12818-112603.png (150.59 KiB) 已瀏覽 109 次
-
- cak-AR12818-112806.png (392.96 KiB) 已瀏覽 109 次
-
- cak-AR12818-112819.png (371.33 KiB) 已瀏覽 109 次
![[Good Job]](./images/smilies/onion_d5f02ecd.gif "Good Job")
誰在線上
正在瀏覽這個版面的使用者：沒有註冊會員 和 8 位訪客