C/2023 P1 (Nishimura) is a long-period comet discovered by Hideo Nishimura on 12 August 2023. With an observation arc of seven months, the orbital period of the comet is estimated to be 434 years.

An eccentricity of 0.996 gives the comet a semi-major axis (average distance from the Sun) of about 57 AU, which is comparable to the average distance of Eris at 68 AU.

The comet will not leave the Solar System and will come to aphelion (farthest distance from the Sun) in 2227.