SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 AL11

2013 AL11

2013 AL11 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.459 AU once every 1.76 yr.

Amor Observations: 74
Orbital Period · P
1.76 yr
v(q)
33.5 km/s
v(Q)
18.2 km/s
Diameter · ≈
0.08 km
TJ
4.58
Eccentricity · e
0.2962

Orbit and dynamics

The path is an ellipse reaching 1.027 AU from the Sun at perihelion and 1.891 AU at aphelion, a radial span of 0.864 AU.

Applying Kepler's third law to a = 1.459 AU gives an orbital period of 1.76 yr, or about 644 days.

An eccentricity of 0.296 makes the orbit moderately elongated.

Its inclination of 4.43° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 33.5 km/s at perihelion and falls to 18.2 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 = 23.23 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.08 km.

Observation record and orbit quality

The current orbit solution is based on 74 observations and has a weighted RMS residual of 0.4649 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.459 AU
Eccentricity
0.2962
Perihelion
1.027 AU
Aphelion
1.891156 AU
Inclination
4.43°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
229.12°

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
2035-Nov-01 13:30 0.403235 AU
60323127 km
16.58 km/s
2036-Mar-13 06:23 0.412599 AU
61723995 km
4.89 km/s
2050-Jan-13 08:53 0.077393 AU
11577879 km
7.41 km/s
2056-Sep-20 05:42 0.427163 AU
63902686 km
5.05 km/s
2057-Feb-02 09:52 0.424292 AU
63473226 km
17.04 km/s
2072-Nov-06 02:42 0.361131 AU
54024379 km
14.24 km/s
2073-Mar-04 21:30 0.384626 AU
57539261 km
3.92 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
23.23

Orbit Quality

RMS
0.46495
Condition
6
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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