NGC 4617 is a spiral galaxy in the constellation of Canes Venatici. Its velocity with respect to the cosmic microwave background is , which corresponds to a Hubble distance of . However, four non-redshift measurements give a closer mean distance of . It was discovered by German-British astronomer William Herschel on 9 March 1788.
NGC 4617 is an active galaxy nucleus candidate, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.
Supernovae Two supernovae have been observed in NGC 4617: SN2005ab (TypeII, mag. 16.7) was discovered by Japanese astronomer Kōichi Itagaki on 5 February 2005. SN2007ss (TypeIa, mag. 16.6) was discovered by Japanese astronomer Yoshimi Ichimura on 20 December 2007.
See also List of NGC objects (4001–5000)
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