SpaceAtlas Space Object Data
NASA JPL SBDB · 2021 GA13

2021 GA13

2021 GA13 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.434 AU once every 1.72 yr.

Amor Observations: 84
Orbital Period · P
1.72 yr
v(q)
32 km/s
v(Q)
19.4 km/s
Diameter · ≈
0.05 km
TJ
4.63
Eccentricity · e
0.2451

Orbit and dynamics

Between its closest point (1.082 AU) and its farthest (1.785 AU), the heliocentric distance changes by 0.703 AU over every revolution.

One full revolution takes 1.72 yr (627 days), computed from the semi-major axis of 1.434 AU.

An eccentricity of 0.245 makes the orbit moderately elongated.

The orbital plane is tilted 10.67° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32 km/s at perihelion and falls to 19.4 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 = 24.21 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

Astrometry from 84 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4794 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
1.434 AU
Eccentricity
0.2451
Perihelion
1.082 AU
Aphelion
1.785473 AU
Inclination
10.67°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
354.54°

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
2033-May-16 02:17 0.110080 AU
16467741 km
7.50 km/s
2045-May-22 12:01 0.220149 AU
32933760 km
10.73 km/s
2057-May-30 10:09 0.368500 AU
55126828 km
15.01 km/s
2076-May-07 11:30 0.118955 AU
17795364 km
6.97 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
24.21

Orbit Quality

RMS
0.47937
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

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