SpaceAtlas Space Object Data
NASA JPL SBDB · 468540

468540

468540 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.839 AU and a period of 0.77 yr.

Aten Observations: 342
Orbital Period · P
0.77 yr
v(q)
65.6 km/s
v(Q)
16.1 km/s
Diameter · ≈
0.46 km
TJ
6.77
Eccentricity · e
0.6052

Orbit and dynamics

The path is an ellipse reaching 0.331 AU from the Sun at perihelion and 1.346 AU at aphelion, a radial span of 1.015 AU.

Applying Kepler's third law to a = 0.839 AU gives an orbital period of 0.77 yr, or about 280 days.

The high eccentricity (0.605) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 27.27° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 65.6 km/s at perihelion and falls to 16.1 km/s at aphelion.

Because q < 1 AU and Q > 1 AU, this orbit geometrically intersects the region of Earth's orbit.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 19.45 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.46 km.

Observation record and orbit quality

The current orbit solution is based on 342 observations and has a weighted RMS residual of 0.4311 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
0.8386 AU
Eccentricity
0.6052
Perihelion
0.331 AU
Aphelion
1.346121 AU
Inclination
27.27°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
199.01°

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
19.45

Orbit Quality

RMS
0.43106
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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