155630

155630 is a number that has appeared in various contexts, most notably in the field of astronomy and space exploration. It is primarily recognized as the designation for a near-Earth asteroid discovered by the Lincoln Near-Earth Asteroid Research (LINEAR) program. This asteroid was first observed on January 11, 2002, and has since been cataloged in the Minor Planet Center database.

The asteroid, officially named 2002 AJ129, is classified under the number 155630 in the Small-Body Orbital Elements database maintained by NASA’s Jet Propulsion Laboratory. It belongs to the Apollo group of near-Earth objects, which are characterized by orbits that cross Earth’s path. While 155630 is not currently considered a significant threat to Earth, its trajectory has been monitored due to its proximity to our planet.

The asteroid has an estimated diameter of approximately 0.7 kilometers (0.43 miles) and orbits the Sun with a period of about 1.1 years. Its close approaches to Earth have been documented, with the most notable occurring on February 4, 2018, when it passed within about 4.2 million kilometers (2.6 million miles) of our planet—roughly 11 times the distance between Earth and the Moon. While such encounters are not uncommon for near-Earth objects, they remain subjects of scientific interest due to potential future risks.

Beyond astronomy, the number 155630 has appeared in other contexts, such as numbering systems in databases, serial numbers, or identifiers in technical documentation. However, its most significant association remains its role as an asteroid designation in planetary science. Researchers continue to study near-Earth objects like 155630 to better understand orbital dynamics, collision risks, and the broader composition of the solar system.