Astrophotography
SH2-91 mosaic with over 50 hours of data
Monday, July 22, 2024
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Franklin Marek |
Franklin Marek recently captured SH2-91 mosaic with over 50 hours of data. This aint your daddys Witchs Broom image, showcasing the faint supernova remnant in Cygnus known as the Southern Part of G65.3+5.7. Using the Orion 120ST achromatic telescope with an NEQ6pro mount, ASI1600mm-cool camera, and Antlia Edge 4.5nm filters, Marek devoted over 52 hours to reveal intricate details, including Campbell's Hydrogen star and a planetary nebula candidate.
The SH2-91 image, known as the Southern Part of G65.3+5.7, depicted a very faint supernova remnant in Cygnus. Designated SH2-91 or G65.3+5.7, it was a large and complex structure. Franklin Marek decided to create a two-panel HOO mosaic, amassing a total of just over 52 hours between the two panes and filters. Additional time was spent capturing details close to Campbell's Hydrogen star, an amazing object in its own right.
SH2-91 Mosaic with over 50 hours of data - This aint your daddys Witchs Broom!
While working on the first pane and exploring the image, Marek discovered an intriguing planetary nebula. Although technically a PN candidate, the image clearly revealed it as a planetary nebula. Campbell's Hydrogen star, situated in the middle of the field of view, was initially mistaken for a carbon star. However, the "What's In My Image" script quickly identified it as a planetary nebula, an object also imaged by Hubble.
Southern part of G65.3+5.7 SH2-91
To avoid blowing out the core, Marek took a series of 30-second exposures, successfully revealing a bull's eye appearance with a bright star surrounded by a bubble of hydrogen. Despite his equipment not matching Hubble's capabilities, the image, rotated to match Hubble's view, showed a similar asymmetry. This detailed effort highlighted the complexity and beauty of SH2-91, far exceeding the expectations of a typical Witch's Broom image.
IRAS 19387+2923 PN Candidate
Campbell's Hydrogen Star
The Red Bat
About Franklin Marek
Franklin Marek is a US Navy veteran who currently works in the Industrial Electric Motor & Generator repair industry. He is married and a father of three, with a strong passion for science and math. He loves the intersection of science and art that astrophotography offers. Despite the challenges of humidity in the bayou, he is dedicated to capturing photons with his modest equipment, which includes an Orion 120ST achromatic telescope, an NEQ6pro mount, an ASI1600mm-cool camera, and Antlia Edge 4.5nm filters.
This Ain't Your Daddy's Witch's Broom! Over 50hrs Mosaic on SH2-91
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