SpaceAtlas Space Object Data
NASA JPL SBDB · 474613

474613

474613 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.525 AU once every 4.01 yr.

Amor Observations: 409
Orbital Period · P
4.01 yr
v(q)
33.9 km/s
v(Q)
10.4 km/s
Diameter · ≈
0.22 km
TJ
3.21
Eccentricity · e
0.5309

Orbit and dynamics

The path is an ellipse reaching 1.185 AU from the Sun at perihelion and 3.866 AU at aphelion, a radial span of 2.681 AU.

Applying Kepler's third law to a = 2.525 AU gives an orbital period of 4.01 yr, or about 1,465 days.

The high eccentricity (0.531) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 12.54° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.9 km/s at perihelion and falls to 10.4 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 = 21.05 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.22 km.

Observation record and orbit quality

The current orbit solution is based on 409 observations and has a weighted RMS residual of 0.546 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
2.525 AU
Eccentricity
0.5309
Perihelion
1.185 AU
Aphelion
3.865522 AU
Inclination
12.54°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
138.42°

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
21.05

Orbit Quality

RMS
0.54597
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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