Here is a galaxy double-double; Holmberg 218 pair on the left, Arp 270 pair on the right. All these galaxies are in the same distance range - about 82 to 89 million light years (by redshift estimate). As such, this foursome are also members of other four galaxy groups - one of those is the Mahtessian 98 galaxy group (also in Temple et al. 2MASS redshift data galaxy groupings - 2016 and 2018 publications).
Other galaxies in this field of note are
NGC 3413 and
IC 2608. This field also has many background galaxies that are visible in the full size image. Finally, there are a number of visible quasars in this image - the furthest has a redshift of 3.304 and a light travel time (Lookback) of 11.77 billion years.
The image below is a crop of
NGC 3424/3430 from the full field - it links to the main page with image and additional information. There is also a link below to the full
FOV and annotated image. The full resolution image has a horizontal
FOV of 0.668 degrees and an image scale of about 0.58 "/pixel.
I accidentally took a number of 1x1 bin Lum exposures (normally, people with the ASI294 camera take 2x2 bin). The rest of my exposures were 2x2 bin. Since I had the 1x1 bin Lum data anyway, I integrated the Lum stack with these sub-frames as well - they actually provided a little better results than without them.
Full
FOV image (Pan and Zoom):
Mahtessian 98 Region(Sh2-221)
Annotated Image (Pan and Zoom):
Mahtessian 98 Region Annotated
Images also available on astrobin -Mahtessian 98 Region
Scope: Celestron 9.25 Edge HD 235 mm at f/7
Camera: ASI294MM (Baader LRGB Filters)
Location: DAA Observatory, Shelter Valley, CA
Jim Thommes
Jim's Astrophotography
David Levy Maksutov Newtonian, Celestron Edge 9.25, FSQ-106N Refractor (on loan), WO ZenithStar 66 APO Refractor, WO Megrez II APO, Sigma 150 mm EOS Lens
Losmandy G11/Gemini, iOptron GEM45, Celestron Advanced VX, iOptron CEM70
ST8300M Camera, Atik 383L, Canon 350D (IR cut modified), ASI1600M, ASI294M, ASI260M
Observatory -
Desert Astronomy Association (Shelter Valley, CA)