What is an astronomical object in direct orbit around the Sun that is neither a planet nor originally classified as a comet called?

The term used to describe an astronomical object in direct orbit around the Sun that is neither classified as a planet nor originally recognized as a comet is known as a minor planet. Minor planets encompass a variety of small celestial bodies, including asteroids and other objects that orbit the Sun.

Asteroids, for example, are a subset of minor planets that are primarily found in the asteroid belt between Mars and Jupiter. Although not exclusively asteroids, the broader classification of minor planets includes these and similar bodies that do not fit the definitions of larger planets or comets. While meteors refer to the visible streaks of light when a meteoroid enters the Earth's atmosphere and moons are natural satellites orbiting planets, they do not constitute direct solar orbiting bodies in this category. Thus, minor planets accurately encompass the definition in question.