SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 CJ129

2013 CJ129

2013 CJ129 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.627 AU it takes 2.08 yr to circle the Sun.

Apollo Observations: 13
Orbital Period · P
2.08 yr
v(q)
35.2 km/s
v(Q)
15.5 km/s
Diameter · ≈
0.04 km
TJ
4.21
Eccentricity · e
0.3894

Orbit and dynamics

Between its closest point (0.993 AU) and its farthest (2.261 AU), the heliocentric distance changes by 1.268 AU over every revolution.

One full revolution takes 2.08 yr (758 days), computed from the semi-major axis of 1.627 AU.

An eccentricity of 0.389 makes the orbit moderately elongated.

The orbital plane is tilted 10.3° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.2 km/s at perihelion and falls to 15.5 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 = 24.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 13 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3996 arcseconds.

Condition code U = 9 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
1.627 AU
Eccentricity
0.3894
Perihelion
0.993 AU
Aphelion
2.260554 AU
Inclination
10.3°
Orbital Period
— yr
Epoch
2456338.5
Mean Anomaly
23.14°

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
24.7

Orbit Quality

RMS
0.39963
Condition
9
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.