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David Callejas

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January 20, 2019

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Michael Teoh
Heng Ee Observatory, Penang, Malaysia

03/30/2022
11:38 am

Photographer's Website

Equipment Details:

APM-TMB 228/2050 Telescope
Lunt Solar Wedge
Baader ND filter OD 3.0
Baader Solar Continuum 540nm
Tele Vue 3x Barlow
QHY5L-II-M Camera

Post-processing Details:

Stacked with AutoStakkkert!3
Wavelet adjustment with Registax 6
Enhancement and false color with Photoshop 2020

Image Details:

AR2975 continue to grow with 20 sunspots in the group. It is very active in hydrogen alpha wavelength.

Posted

January 20, 2019

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David Callejas

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About the Author:

David Callejas, Marketing Director, helps bring EarthSky's content to the world via online ads and other products. He creates strategies that help people around the world find us and appreciate the work we do. He helps manage the EarthSky Store and bring to you the new products that you love. He's the chief liaison between EarthSky.org and the world of commerce. All that, plus he helps post content and populate our pages on Facebook, Google+ and Twitter. Go David!