413421
413421 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.902 AU once every 4.94 yr.
Orbit and dynamics
The path is an ellipse reaching 1.205 AU from the Sun at perihelion and 4.599 AU at aphelion, a radial span of 3.394 AU.
Applying Kepler's third law to a = 2.902 AU gives an orbital period of 4.94 yr, or about 1,806 days.
The high eccentricity (0.585) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.
The orbital plane is tilted 17.83° relative to the ecliptic.
By the vis-viva equation its orbital speed rises to 34.2 km/s at perihelion and falls to 9 km/s at aphelion.
Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.
Size and surface
The measured diameter is 1.9 km, a value from direct size determination rather than from brightness alone.
Its geometric albedo of 0.023 indicates a very dark, carbonaceous-type surface.
Observation record and orbit quality
The current orbit solution is based on 222 observations and has a weighted RMS residual of 0.595 arcseconds.
Condition code U = 0 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.
About these computed values
Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.
Orbital Parameters
Orbit diagram
The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.
3D orbit (interactive)
Drag to rotate; scroll or pinch to zoom. The Sun is at the focus (orange), Earth's orbit is the grey ring at 1 AU, and the red dot marks the object's current position.
Close approaches
No close approaches to Earth are currently on record for this object.
