NGC 718 is an intermediate spiral galaxy in the constellation of Pisces. Its velocity with respect to the cosmic microwave background is , which corresponds to a Hubble distance of . Additionally, one non-redshift measurement gives a similar distance of . It was discovered by German-British astronomer William Herschel on 13 December 1784.
NGC 718 has a possible active galactic nucleus, 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.
A star-forming disk has been detected around the core of NGC 718. The size of its semi-major axis is estimated at .
Supermassive black hole Based on measurements of the near-infrared K-band luminosity of the galaxy's bulge, NGC 718 has a supermassive black hole with a mass of (32 million solar masses).
NGC 676 group NGC 718 is a member of a small group of three galaxies known as the NGC 676 group. The other two galaxies are NGC 676 and .
Intermediate-luminosity red transient One intermediate-luminosity red transient (ILRT) has been observed in NGC 718: AT 2019udc (Type ILRT, mag. 18.813) was discovered by the Distance Less Than 40 Mpc Survey (DLT40) on 4 November 2019. This object had initially been classified as a luminous blue variable.
See also List of NGC objects (1–1000)
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