Total Known:

Total Plotted:

X-axis: Semi-Major Axis

Y-axis: Inclination

Populations:

NEA Groups: High Error Objects Low Delta V Low Opposition Recent NEAs

Asteroid populations are based on computed dynamical types.

Advanced Query

Order By:

Min.

Max.

Semi-major Axis (au):

Aphelion (au):

Perihelion (au):

Heliocentric Distance (au):

Eccentricity:

Inclination:

Absolute Magnitude:

Plot Settings

X-Axis

Y-Axis

Color Scale on

Max Points

Observatory

UTC Date | Set To Current UTC

Time Step

Duration

Supress Daylight

Supress Below Horizon

Observing Tools

AstEph

Asteroid and observatory-specific ephemeris generator.

AstFinder

Build finder chart for a given asteroid and time.

AstInfo

Return orbital and physical properties for a given asteroid.

AstObs

Observability chart for asteroids and observatory.

MOID List

Asteroids whose orbits are near one or more of the major planets.

Critical List Of Asteroids

Pre-defined lists of asteroids observable tonight.

Asteroid Orbital Elements

Access to, and information about, the astorb orbital elements database.

Hierarchical Observing Protocol

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 routinely updated; some tools may experience bugs. If a bug is particularly important, please direct concerns to asteroid@lowell.edu.

Recent Updates

For the full history of updates see the updates page.

Date	Update