SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 AA2

2020 AA2

2020 AA2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.989 AU it takes 2.81 yr to circle the Sun.

Apollo Observations: 24
Orbital Period · P
2.81 yr
v(q)
38.1 km/s
v(Q)
11.7 km/s
Diameter · ≈
0.01 km
TJ
3.66
Eccentricity · e
0.5303

Orbit and dynamics

The path is an ellipse reaching 0.934 AU from the Sun at perihelion and 3.044 AU at aphelion, a radial span of 2.11 AU.

Applying Kepler's third law to a = 1.989 AU gives an orbital period of 2.81 yr, or about 1,025 days.

The high eccentricity (0.53) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 4.79° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 38.1 km/s at perihelion and falls to 11.7 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 = 27.05 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 24 observations and has a weighted RMS residual of 0.4046 arcseconds.

Condition code U = 8 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
1.989 AU
Eccentricity
0.5303
Perihelion
0.934 AU
Aphelion
3.043767 AU
Inclination
4.79°
Orbital Period
— yr
Epoch
2458853.5
Mean Anomaly
10.65°

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
2048-Jan-25 21:10 0.194839 AU
29147441 km
18.42 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
27.05

Orbit Quality

RMS
0.40461
Condition
8
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.