5287

5287 is the assigned number of a minor planet in the main asteroid belt. The object was discovered on 8 June 1990 by the Palomar Observatory Supernova Search survey using a 1.2‑m Schmidt telescope. It was subsequently observed multiple times by both professional and amateur astronomers, allowing a precise orbit to be calculated. The minor planet follows a nearly circular orbit around the Sun with a semi‑major axis of roughly 2.66 astronomical units, an orbital period of about 4.36 years, and an inclination of 6.3 degrees with respect to the ecliptic. Its orbit locates it in the central part of the main belt, between the orbits of Mars and Jupiter. Based on its absolute magnitude of 13.3 and an assumed albedo of 0.15, its diameter is estimated to be approximately 8.5 kilometers, although direct measurements have not yet been made. The asteroid was given a name in 2002, officially adopted by the Minor Planet Center, but the origin of the chosen designation is lost to contemporary reference material.

In numerical theory, 5287 is an odd prime number. Its position in the sequence of prime numbers places it downstream of the 700th prime. The number has no notable algebraic properties beyond being a prime; it is not a Sophie Germain prime, nor a twin prime. Its appearance in mathematics is primarily as a reference point when enumerating primes or as a test case in algorithms for primality testing. Because it is a relatively small prime, it sometimes appears in tables of prime numbers used in computational demonstrations or in teaching contexts. The number 5287 has no implied meaning outside of being a distinct identifier in scientific catalogs or a specific reference point in numeric lists.