SpaceAtlas Space Object Data
NASA JPL SBDB · 2024 SW4

2024 SW4

2024 SW4 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.952 AU once every 2.73 yr.

Amor Observations: 355
Orbital Period · P
2.73 yr
v(q)
34.4 km/s
v(Q)
13.2 km/s
Diameter · ≈
0.15 km
TJ
3.75
Eccentricity · e
0.446

Orbit and dynamics

The path is an ellipse reaching 1.082 AU from the Sun at perihelion and 2.823 AU at aphelion, a radial span of 1.741 AU.

Applying Kepler's third law to a = 1.952 AU gives an orbital period of 2.73 yr, or about 996 days.

The high eccentricity (0.446) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 9.18° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.4 km/s at perihelion and falls to 13.2 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 = 21.93 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.15 km.

Observation record and orbit quality

The current orbit solution is based on 355 observations and has a weighted RMS residual of 0.4138 arcseconds.

Condition code U = 5 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
1.952 AU
Eccentricity
0.446
Perihelion
1.082 AU
Aphelion
2.822592 AU
Inclination
9.18°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
228.72°

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
2054-Oct-08 16:42 0.150456 AU
22507939 km
9.63 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
21.93

Orbit Quality

RMS
0.41375
Condition
5
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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