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David Callejas

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January 20, 2019

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David Hoskin
Halifax, Nova Scotia, Canada

06/12/2022
10:00 am

Equipment Details:

White light: Celestron 102mm f/9.8 refractor, APM Herschel Wedge, One Player Apollo-M Mini camera with UV/IR cut filter and GSO 2.5x Barlow, SkyWatcher EQ6R mount.
Hydrogen alpha: Lunt 40mm dedicated solar telescope, ZWO ASI290MM camera with GSO 2.5X Barlow, SkyWatcher EQ6R mount.

Post-processing Details:

White light: AutoStakkert, Registax, Photoshop, PhotoScape X, MS Photo.
Hydrogen alpha: AutoStakkert, IMPPG, Photoshop, PhotoScape X, MS Photo.

Image Details:

Sunspot group AR3030 imaged in white light (L) and hydrogen alpha (R). Although a M-class solar flare erupted from AR3030 on June 11, its magnetic field is now stable so there is little chance of another solar flare today (June 12). The white light image shows the umbra and penumbra of sunspots as well as an extensive area of faculae. Seeing was only fair so I was not able to resolve convection cells. The hydrogen alpha image (inverted to increase surface contrast) shows sunspot group AR3030 and several filaments.

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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!