Interactive table of observable NEOs
Asteroid and observatory-specific ephemeris generator.
Build finder chart for a given asteroid and time.
Return orbital and physical properties for a given asteroid.
Observability chart for asteroids and observatory.
Asteroids whose orbits are near one or more of the major planets.
Pre-defined lists of asteroids observable tonight.
Access to, and information about, the astorb orbital elements database.
Generate asteroid observing priority list given a set of criteria.
Lowell Observatory offers these tools to assist with asteroid observation planning and to facilitate data mining across multiple surveys. Orbital solutions are calculated in-house based on Minor Planet Center observations.
This website is in the process of being upgraded and as such is in beta status; some tools may experience bugs. If a bug is particularly important, please direct concerns to asteroid@lowell.edu.
For more details see the astorb citation
astorb.dat and astorb.dat.gz have permanently moved to
https://ftp.lowell.edu/pub/elgb/astorb.dat
and https://ftp.lowell.edu/pub/elgb/astorb.dat.gz,
respectively. FTP access is no longer supported.