
Near-Earth orbit - Wikipedia
Near-Earth orbit or Near Earth orbit may refer to: Low Earth orbit, orbits around Earth that are near it; Near-Earth space, space of the main geocentric orbits; Near-Earth object orbits, Solar …
Near-Earth object - Wikipedia
A near-Earth object (NEO) is any small Solar System body orbiting the Sun whose closest approach to the Sun is less than 1.3 times the Earth–Sun distance (astronomical unit, AU). [2]
Near-Earth Object Program - NASA
2023年5月1日 · Near-Earth Objects, or NEOs, are comets and asteroids that have been nudged by the gravitational attraction of nearby planets into orbits that allow them to enter Earth’s …
Near-Earth Object Observations Program - NASA
2019年2月12日 · The Center for Near-Earth Object Studies (CNEOS) computes high-precision orbit paths for NEOs from positions reported to the Minor Planet Center. CNEOS computes …
Center for NEO Studies
CNEOS is NASA's center for computing asteroid and comet orbits and their odds of Earth impact. See our Close Approach Tables for more on this object and other NEOs. See our Discovery …
Near-Earth Objects - NASA
NEOs are a broad category of small-bodies defined as those with a trajectory that can come within 1.3 au of the Sun. Since the Earth orbits at approximately 1 au, such objects can in …
Near-Earth Objects - UNOOSA
6 天之前 · Near-Earth Objects, or NEOs, represent potentially catastrophic threats to our planet. A near-Earth object is an asteroid or comet which passes close to the Earth's orbit.
Orbits: A brief guide to Near-Earth Orbits - Orbital Today
2020年2月20日 · Near-Earth orbits are classified into the following main categories: low-earth orbits (from 160 to 2000 km above earth) medium-earth orbits (from 2000 to 36000 km)
NEO Basics - NASA
Near-Earth Objects (NEOs) are comets and asteroids that have been nudged by the gravitational attraction of nearby planets into orbits that allow them to enter the Earth’s neighborhood.
Near-Earth Object | UNDRR - United Nations Office for Disaster …
A near-Earth object (NEO) is an asteroid or comet whose trajectory brings it to within 1.3 astronomical units of the Sun and hence within 0.3 astronomical units, or approximately 45 …