SpaceAtlas Space Object Data
NASA JPL SBDB · 2025 WF4

2025 WF4

2025 WF4 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.227 AU once every 1.36 yr.

Amor Observations: 34
Orbital Period · P
1.36 yr
v(q)
28.5 km/s
v(Q)
25.3 km/s
Diameter · ≈
0.07 km
TJ
5.13
Eccentricity · e
0.0595

Orbit and dynamics

The path is an ellipse reaching 1.154 AU from the Sun at perihelion and 1.3 AU at aphelion, a radial span of 0.146 AU.

Applying Kepler's third law to a = 1.227 AU gives an orbital period of 1.36 yr, or about 496 days.

With e = 0.059, the orbit is close to circular.

A steep inclination of 24.26° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 28.5 km/s at perihelion and falls to 25.3 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 = 23.49 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

The current orbit solution is based on 34 observations and has a weighted RMS residual of 0.5096 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
1.227 AU
Eccentricity
0.0595
Perihelion
1.154 AU
Aphelion
1.300007 AU
Inclination
24.26°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
133.43°

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
2059-Dec-20 11:02 0.187045 AU
27981606 km
12.56 km/s
2078-Dec-14 13:26 0.178982 AU
26775263 km
12.65 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
23.49

Orbit Quality

RMS
0.50957
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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