SpaceAtlas Space Object Data
NASA JPL SBDB · 329520

329520

329520 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.402 AU once every 1.66 yr.

Amor Observations: 558
Orbital Period · P
1.66 yr
v(q)
32 km/s
v(Q)
19.8 km/s
Diameter · ≈
0.38 km
TJ
4.68
Eccentricity · e
0.2365

Orbit and dynamics

Between its closest point (1.071 AU) and its farthest (1.734 AU), the heliocentric distance changes by 0.663 AU over every revolution.

One full revolution takes 1.66 yr (606 days), computed from the semi-major axis of 1.402 AU.

An eccentricity of 0.236 makes the orbit moderately elongated.

The orbital plane is tilted 16.78° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32 km/s at perihelion and falls to 19.8 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

No direct size measurement is available; from an absolute magnitude of H = 19.86 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.38 km.

Observation record and orbit quality

Astrometry from 558 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4792 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

Semi-Major Axis
1.402 AU
Eccentricity
0.2365
Perihelion
1.071 AU
Aphelion
1.733573 AU
Inclination
16.78°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
117.3°

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.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
19.86

Orbit Quality

RMS
0.47918
Condition
0
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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.

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