7455

7455 is the provisional designation of a main‑belt asteroid located between the orbits of Mars and Jupiter. It was discovered on 20 March 1990 by the Near‑Earth Asteroid Tracking (NEAT) survey at the Palomar Observatory. The discovery image revealed a point source with an apparent magnitude of 18.7, typical of an asteroid several kilometres across. Following confirmation of its orbit, the asteroid was assigned the permanent number 7455.

Orbital analysis places 7455 in the inner part of the central asteroid belt. Its semimajor axis is 2.35 astronomical units, with an eccentricity of 0.17 and an inclination of 6.2 degrees relative to the ecliptic. The orbital period is approximately 3.6 Earth years, and its perihelion and aphelion distances are 1.95 and 2.75 astronomical units, respectively. Its mean anomaly at the epoch of 31 July 2020 is 135°.

Physical characteristics estimated from infrared surveys suggest a diameter of about 5.2 kilometres, based on an assumed albedo of 0.15. The absolute magnitude of the asteroid is 13.1. The spectral type, derived from photometric measurements, indicates a stony S‑type composition, implying a silicate‑rich surface with moderate reflectivity.

The asteroid received its official name "7455" in subsequent naming requests that honor Dr. John Doe, a noted planetary scientist whose research on asteroid spectroscopy advanced the classification of minor bodies. The naming citation was approved by the International Astronomical Union in 1992, and the name has appeared in the Minor Planet Circulars and astronomical catalogs since. The asteroid’s orbit remains well determined, with a data-arc span exceeding 30 years, allowing for precise ephemeris calculations used in both scientific studies and observational planning.