SpaceAtlas Space Object Data
NASA JPL SBDB · 2022 AB4

2022 AB4

2022 AB4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.247 AU it takes 1.39 yr to circle the Sun.

Apollo Observations: 54
Orbital Period · P
1.39 yr
v(q)
38.5 km/s
v(Q)
18.5 km/s
Diameter · ≈
0.02 km
TJ
5.09
Eccentricity · e
0.3499

Orbit and dynamics

The path is an ellipse reaching 0.81 AU from the Sun at perihelion and 1.683 AU at aphelion, a radial span of 0.873 AU.

Applying Kepler's third law to a = 1.247 AU gives an orbital period of 1.39 yr, or about 509 days.

An eccentricity of 0.35 makes the orbit moderately elongated.

Its inclination of 3.99° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 38.5 km/s at perihelion and falls to 18.5 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 = 26.79 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 54 observations and has a weighted RMS residual of 0.3202 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
1.247 AU
Eccentricity
0.3499
Perihelion
0.81 AU
Aphelion
1.683325 AU
Inclination
3.99°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
22.83°

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
2028-Dec-27 08:42 0.232353 AU
34759573 km
17.62 km/s
2033-Jun-20 20:20 0.110788 AU
16573679 km
14.03 km/s
2039-Nov-19 22:58 0.467511 AU
69938623 km
8.61 km/s
2047-Jul-11 16:41 0.325138 AU
48639973 km
6.08 km/s
2054-Jan-16 10:49 0.001509 AU
225680 km
8.47 km/s
2058-Jul-07 11:39 0.467745 AU
69973628 km
23.62 km/s
2061-Jan-01 10:28 0.143524 AU
21470855 km
14.74 km/s
2065-Jun-27 00:22 0.198576 AU
29706472 km
17.46 km/s
2067-Dec-22 04:13 0.293340 AU
43882969 km
21.50 km/s
2072-Jun-14 10:34 0.037113 AU
5552065 km
10.91 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
26.79

Orbit Quality

RMS
0.32019
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.

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