NGC 7645 is a barred spiral galaxy in the constellation of Sculptor. Its velocity with respect to the cosmic microwave background is , which corresponds to a Hubble distance of . It was discovered by British astronomer John Herschel on 27 September 1834.
Pair of galaxies
According to Soares and colleagues, NGC 7645 and form a galaxy pair with a probability of 0.57. The Hubble distance to NGC 7636 is , which is close to that of NGC 7645. The galaxies are separated by an angular distance of .
Supernovae Two supernovae have been observed in NGC 7645: SN 2010kx (TypeII-P, mag. 17.5) was discovered by Kōichi Itagaki on 19 December 2010. SN 2026aabq (TypeIIb, mag. 19.7) was discovered by GOTO on 23 August 2026.
See also List of NGC objects (7001–7840)
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