* Astronomy

NGC 4618 (also IC 3667, Arp 23, MCG 7-26-37, UGC 7853 and PGC 42575) is a magnitude +11.2 distorted dwarf galaxy located 25 million light years away in the constellation Canes Venatici. 
Unlike most spiral galaxies, NGC 4618 has a single spiral arm, which gives the galaxy an asymmetric appearance. 
The galaxy is gravitationally interacting with the neighbouring galaxy NGC 4625: these two galaxies are listed as Arp 23 in the Atlas of peculiar galaxies by Halton Arp.

The galaxy was discovered by German-British astronomer William Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector at Windsor Road, Slough, on the 9th April 1787.
The galaxy was rediscovered by Max Wolf in March 1903 and relisted as IC 3667.

Right Ascension 12h 41m 32.8s, Declination +41° 09' 03"

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