100149

100149 is a minor planet in the asteroid belt that was discovered on March 18, 1994, by the Spacewatch project at the Kitt Peak National Observatory in Arizona, United States. The asteroid has a overall arc of 149 observations by 115 different observers. The maximum distance of its orbit, called the aphelion, is approximately 3.53 astronomical units, while the minimum distance, or perihelion, is around 2.06 astronomical units.

The orbital characteristics of 100149 are typical of a member of the asteroid belt. It orbits the Sun at an average distance of approximately 2.79 astronomical units. Its perihelion is observed when it is in opposition to the Sun, which means it is on the opposite side of the celestial sphere relative to an observer on Earth. Due to these periodic phenomena, the asteroid appears to have its perihelion about every 381 Earth days. On average, the orbital period of 100149 is around 3.77 years.

There have been varied attempts to classify the asteroid 100149 based on its orbital parameters, posing some uncertainty. Initial information suggested that it belonged to both the Apollo asteroids and the Atens. However, additional observations lead to the classification of a Trans-Neptunian object, and then further analysis questioned the category based on the calculated average apparent magnitude curve and publication of additional orbital data. Thus, this asteroid has gone through multiple reclassifications in response to updates from observational data.