Sunspots.

태양 흑점.

2021.04.20. UT.

오늘 흑점이 많네요. 태양 왼쪽 가장자리에도 흑점이 새롭게 나타났습니다.

150mm (TOA-150) refractor, Baader 2" Cool-Ceramic Safety Herschel Prism,

Galaxy Note 8 smartphone camera.

Bum-Suk Yeom. 염범석.

Sunspot moving (movie). 2160 x 2160 pixels. SDO/HMI.
2020. Nov. 22. 00:30 - Nov. 27. 23:30 UT.

태양 흑점 움직임 (동영상).
2020. 11. 22. 09:30 - 11. 28. 08:30 KST.

https://youtu.be/UKG_oQ2VmW0

Images: NASA/Solar Dynamics Observatory (SDO).
Video: Bum-Suk Yeom (염범석).

Sunspot moving (movie). 2048 x 2048 pixels.
2020. 10. 25. 00:30 - 10. 31. 23:30 UT.

2048 x 2048 pixels: https://youtu.be/aUGq9Iac9uk

태양 흑점 움직임.
2020. 10. 25. 09:30 - 11. 01. 08:30 KST.

Images: NASA/Solar Dynamics Observatory (SDO).
Video: Bum-Suk Yeom.

Sunspot moving (movie). 2048 x 1024 pixels.
2020. 10. 25. 00:30 - 10. 31. 23:30 UT.

https://youtu.be/k4NvTxsfqmI

태양 흑점 움직임.
2020. 10. 25. 09:30 - 11. 01. 08:30 KST.

Images: NASA/Solar Dynamics Observatory (SDO).
Video: Bum-Suk Yeom.

2020-07-27.

Sunspot AR2767 is a member of new Solar Cycle 25.

이 흑점(AR2767)은 태양 주기 25의 흑점.

오래간만에 흑점(AR2767)이 생겼는데 날씨는 여전히 흐림.

Image credit: SDO(Solar Dynamics Observatory) / NASA / Space Weather Prediction Center / NOAA.

Sunspot. 태양 흑점.
2020. 06. 05 (UTC). 

큰 흑점이 생겼네요.

http://cometsky.com/astrophotos/20200605_sunspot_web_bsyeom.jpg

Taken by Bum-Suk Yeom on June 05, 2020 UTC @ Iksan, South Korea. 
Details: Takahashi TOA-150 Apo refractor (f=1100mm, F7.3), Canon EOS 80D camera, Solar filter, ISO 200, f/7.3, 1/800 sec.

2020. 06. 05. 다카하시 토아-150 아포 굴절망원경 (f=1100mm, F7.3), 캐논 EOS 80D 카메라, 태양 유리 필터, f/7.3, ISO 200, 노출시간 1/800초, 전라북도 익산, 염범석.  

Bum-Suk Yeom. 염범석.

Daily and monthly sunspot numbers for the last 13 years.

지난 13년 동안의 일별 및 월별 흑점 수 변화.

올해까지는 흑점을 보는게 쉽지가 않네요. 그래도 내년부터는 흑점을 좀 더 자주 볼 수 있을 것 같네요.

http://cometsky.com/astronews/20200309_sunspot_number_13_year.jpg

지난 13년 동안의 일별 흑점 수 (노란색), 월별 평균 흑점 수 (파란색), 평활화한 월별 흑점 수 (빨간색) 및 월별 평활화한 흑점 수의 12개월 사전 예측:

SC (빨간색 점선) : 흑점 수에만 기반을 둔 예측한 선.

CM (빨간색 대시선) : 흑점 수와 지자기 지수를 결합하여 예측한 선.

Daily and monthly sunspot number (last 13 years).

Daily sunspot number (yellow), monthly mean sunspot number (blue), smoothed monthly sunspot number (red) for the last 13 years and 12-month ahead predictions of the monthly smoothed sunspot number:

SC (red dots) : prediction method based on an interpolation of Waldmeier's standard curves; It is only based on the sunspot number series.

CM (red dashes) : method (from K. Denkmayr and P. Cugnon) combining a regression technique applied to the sunspot number series with the aa geomagnetic index used as a precursor (improved predictions during the minimum phase between solar cycles).

Credit: SILSO data/image, Royal Observatory of Belgium, Brussels.

The appearance and disappearance of sunspot AR2738. 13 days.
태양 흑점 AR2738의 나타남과 사라짐. 13일간의 동영상.

2019. 04.07. - 04.20. 01:00 UTC.
2019. 04.07. - 04.20. 10:00 KST.

https://youtu.be/PsM5XRnBoc8

Image credit: NASA/Solar Dynamics Observatory (SDO). 
Video creator: Bum-Suk Yeom.

Sunspot. 태양 흑점.
2019. 04. 13. 07:54 UTC (16:54 KST). 

Bum-Suk Yeom. 염범석.

http://cometsky.com/astrophotos/sunspot_20190413_med_bsyeom.jpg

Taken by Bum-Suk Yeom on April 13, 2019 UTC @ Iksan, South Korea. 
Details: 07:54 UTC (16:54 KST), Takahashi TOA-150 Apo refractor (f=1100mm, F7.3), Canon EOS M6 camera, Solar filter, ISO 200, f/7.3, 1/2000 sec x 4.

2019. 04. 13. 16:54 KST, 다카하시 토아-150 아포 굴절망원경 (f=1100mm, F7.3), 캐논 EOS M6 카메라, 태양 유리 필터, f/7.3, ISO 200, 노출시간 1/2000초 x 4, 전라북도 익산, 염범석.  

Copyright © Bum-Suk Yeom(염범석). All rights reserved.

Goodbye! Sunspot AR2736 (movie). 6 day. 1024 x 1024 pixels.

2019. 03. 19. 10:00 - 03. 25. 10:00 UTC. 

https://youtu.be/JoEwon0VfqE

http://cometsky.com/astronews/2019_0319-0325_1000_sdo_hmiic_bsyeom.mp4

잘가! 태양 흑점 AR2736.

2019. 03. 19. 19:00 - 03. 25. 19:00 KST. 

2후에 다시 볼 수 있기를 기대하며... 

염범석. Bum-Suk Yeom.

Credit: Solar Dynamics Observatory (SDO), NASA.