SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 CL129

2013 CL129

2013 CL129 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.106 AU it takes 1.16 yr to circle the Sun.

Apollo Observations: 22
Orbital Period · P
1.16 yr
v(q)
35.2 km/s
v(Q)
22.8 km/s
Diameter · ≈
0.01 km
TJ
5.61
Eccentricity · e
0.2136

Orbit and dynamics

Between its closest point (0.87 AU) and its farthest (1.342 AU), the heliocentric distance changes by 0.472 AU over every revolution.

One full revolution takes 1.16 yr (425 days), computed from the semi-major axis of 1.106 AU.

An eccentricity of 0.214 makes the orbit moderately elongated.

Its inclination of 2.72° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.2 km/s at perihelion and falls to 22.8 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 = 28.4 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 22 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5635 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
1.106 AU
Eccentricity
0.2136
Perihelion
0.87 AU
Aphelion
1.342242 AU
Inclination
2.72°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
211.98°

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

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2040-Sep-12 16:50 0.026128 AU
3908619 km
7.01 km/s
2041-May-03 05:17 0.295179 AU
44158166 km
6.14 km/s
2047-Sep-04 03:31 0.168857 AU
25260660 km
11.90 km/s
2048-May-22 18:16 0.327155 AU
48941680 km
6.53 km/s
2049-Mar-04 18:11 0.305303 AU
45672613 km
16.86 km/s
2054-Aug-26 08:40 0.248187 AU
37128184 km
17.04 km/s
2056-Feb-24 16:48 0.027319 AU
4086865 km
11.52 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
28.4

Orbit Quality

RMS
0.56349
Condition
7
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. 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

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