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NASA Center for NEO Studies (CNEOS)

Center for computing asteroid and comet orbits and their probability of Earth impact

The JPL Center for NEO Studies (CNEOS) computes high-precision orbits for Near-Earth Objects (NEOs) in support of NASA’s Planetary Defense Coordination Office. These orbit solutions are used to predict NEO close approaches to Earth, and produce comprehensive assessments of NEO impact probabilities over the next century. Continually updated calculations of orbital parameters, close approaches, impact risks, discovery statistics, and mission designs to possibly human-accessible asteroids are made available on this website and to user scripts through an Application Program Interface (API). CNEOS supports observers through the JPL Horizons high precision ephemeris computation capability.

CNEOS is the home of JPL’s Sentry impact monitoring system, which performs long-term analyses of possible future orbits of hazardous asteroids, searching for impact possibilities over the next century. Similarly, the CNEOS Scout system monitors the MPC webpages of new potential asteroid discoveries and computes the possible range of future motions even before these objects have been confirmed as discoveries.

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See also: Institute NASA - National Aeronautics and Space Administration

Details last updated 21-Sep-2019

People at NASA Center for NEO Studies (CNEOS)

Paul Chodas

Manager of the Center for Near-Earth Object Studies (CNEOS) at JPL

Detlef Koschny

Co-Manager of the Near-Earth Object Segment of the Space Situational Awareness Programme

NASA Center for NEO Studies (CNEOS) News

Potentially devastating asteroid skims by Earth almost undetected

Independent - 20-Sep-2019

Have you got your go bag ready in case of an unexpected disaster?


NASA's plan to defend the Earth from asteroids

CNET - 20-Jun-2018

NASA is developing a detection and defence system against 50m to 140m asteroids


First international asteroid tracking exercise proves a success

New Atlas - 08-Nov-2017

An international team led by NASA has tested the International Asteroid Warning Network, which su...


Scientists Urge Funding For Armageddon-style Asteroid Mission

Universe Today - 22-Sep-2017

Space agencies from around the world are dedicated to develop techniques for protecting Earth fro...

Topics mentioned on this page:
Asteroid Impact