SpaceAtlas Space Object Data
NASA JPL SBDB · 464639

464639

464639 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.836 AU once every 2.49 yr.

Amor Observations: 95
Orbital Period · P
2.49 yr
v(q)
33.6 km/s
v(Q)
14.4 km/s
Diameter · ≈
0.52 km
TJ
3.92
Eccentricity · e
0.3995

Orbit and dynamics

The path is an ellipse reaching 1.102 AU from the Sun at perihelion and 2.569 AU at aphelion, a radial span of 1.467 AU.

Applying Kepler's third law to a = 1.836 AU gives an orbital period of 2.49 yr, or about 909 days.

An eccentricity of 0.4 makes the orbit moderately elongated.

Its inclination of 3.58° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 33.6 km/s at perihelion and falls to 14.4 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 = 19.17 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.52 km.

Observation record and orbit quality

The current orbit solution is based on 95 observations and has a weighted RMS residual of 0.6266 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
1.836 AU
Eccentricity
0.3995
Perihelion
1.102 AU
Aphelion
2.569482 AU
Inclination
3.58°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
126.12°

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
19.17

Orbit Quality

RMS
0.62658
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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