2021 January 21 Sun - solar surface in white-light, with AR12797 and AR12798

各類觀測太陽的儀器介紹及太陽攝影 Solarmax
Coronado PST
回覆文章
PTS
夸克星
文章: 9606
註冊時間: 週日 28 10月, 2007 08:50
來自: HK

2021 January 21 Sun - solar surface in white-light, with AR12797 and AR12798

文章 PTS » 週四 21 1月, 2021 17:56

2021 January 21 Sun - solar surface in white-light, with AR12797 and AR12798

The sky is 99% cloud-covered today and I go for a walk along the trails of Mt. Parker. Near the end of my walk, the Sun shows up and I hurry home to get some solar images before sunset.

I am not surprised that NOAA splits AR12797 into AR12797 and AR12798 as both H-alpha and Ca-K observations in the past few days point to such.
AR12797 is located at (S18E32) and AR12798 is just east of it at (S17e41).
While AR12798 is clearly a Class-C bipolar group, with at least 4 sunspots, the classification for AR12797 is a bit difficult. It still looks like being formed from splitting of a single large sunspot. However, we can now clearly see 2 sunspots, both with mature penumbrae, thus it is now a Class-G bipolar group.
sunspot count: group=2, sunspot=6, R=26

Telescope: Celestron C5, 127mm f/10 Schmidt-Cassegrain
Camera : ASI1600MM Pro, not cooled.
focal length : 1250 mm f/10
Filters: Baader Solar Film 5.0+ Baader Planetarium G-band continuum.
approximately north is up, east to the left
附加檔案
ha-disc-161805.jpg
ha-disc-161805.jpg (4.5 MiB) 已瀏覽 148 次
ha-disc-162002.jpg
ha-disc-162002.jpg (3.93 MiB) 已瀏覽 148 次
ha-AR12797-798-161855.png
ha-AR12797-798-161855.png (206.81 KiB) 已瀏覽 148 次
ha-AR12797-798-161908.png
ha-AR12797-798-161908.png (427.84 KiB) 已瀏覽 148 次
ha-AR12797-798-161924.png
ha-AR12797-798-161924.png (427.94 KiB) 已瀏覽 148 次
ha-AR12797-798-162022.png
ha-AR12797-798-162022.png (421.69 KiB) 已瀏覽 148 次
ha-AR12797-798-162038.png
ha-AR12797-798-162038.png (437.01 KiB) 已瀏覽 148 次

回覆文章

回到「太陽觀測和攝影 Solar Observation & Photography」

誰在線上

正在瀏覽這個版面的使用者:沒有註冊會員 和 1 位訪客