SpaceAtlas Space Object Data
NASA JPL SBDB · 2012 WR3

2012 WR3

2012 WR3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.419 AU it takes 3.76 yr to circle the Sun.

Apollo Observations: 49
Orbital Period · P
3.76 yr
v(q)
37.2 km/s
v(Q)
9.8 km/s
Diameter · ≈
0.03 km
TJ
3.24
Eccentricity · e
0.5816

Orbit and dynamics

The path is an ellipse reaching 1.012 AU from the Sun at perihelion and 3.826 AU at aphelion, a radial span of 2.814 AU.

Applying Kepler's third law to a = 2.419 AU gives an orbital period of 3.76 yr, or about 1,374 days.

The high eccentricity (0.582) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 11.09° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.2 km/s at perihelion and falls to 9.8 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 25.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

The current orbit solution is based on 49 observations and has a weighted RMS residual of 0.4751 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
2.419 AU
Eccentricity
0.5816
Perihelion
1.012 AU
Aphelion
3.82589 AU
Inclination
11.09°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
219.58°

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
25.5

Orbit Quality

RMS
0.47508
Condition
7
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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