Celestial hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  IC 3668  ·  IC 3675  ·  NGC 4618  ·  NGC 4625
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NGC4618 (Arp 23) and NGC 4625, Bob Rucker
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NGC4618 (Arp 23) and NGC 4625

Getting plate-solving status, please wait...
NGC4618 (Arp 23) and NGC 4625, Bob Rucker
Powered byPixInsight

NGC4618 (Arp 23) and NGC 4625

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Description

A single night of clear weather let me point to this interesting galaxy group that is not a commonly imaged target.  Unlike most spiral galaxies, NGC 4618 has a single spiral arm, which gives the galaxy an asymmetric appearance. This galaxy was included in the Atlas of Peculiar Galaxies as one of three examples of nearby galaxies with single spiral arms. Although NGC 4618 is labeled as peculiar, many similar galaxies have been identified.

It has been hypothesized that this galaxy's asymmetric structure may be the result of a gravitational interaction with NGC 4625. Such asymmetric structure is commonly seen among many interacting galaxies. This image would have benefited from a bit more integration but clouds have rolled back in so this is as good as it gets.

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NGC4618 (Arp 23) and NGC 4625, Bob Rucker