Arp 75

Posted by dcrowson
on Friday, March 3, 2023
Arp 75 (NGC 702, PGC 6852 and others) is an odd galaxy – possibly two interacting – found in Cetus. Looking at the image closely, there are large, faint arms that extend well beyond the center. This one is part of Arp’s ‘Spirals with high-surface-brightness companions on arms’ class. The companion might be PGC 144370, the galaxy left (east) of NGC 702.

MCG-01-05-040 (PGC 6791 and others) is the interesting, lenticular-looking galaxy at the top right.

See the annotated message for locations of these and quite a few more galaxies.

Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2

360 minutes total exposure – 6 hours

Imaged November 3rd, 4th, 5th and 6th, 2021 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

LRGB annotated -
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