SpaceAtlas Space Object Data
NASA JPL SBDB · 2025 WM8

2025 WM8

2025 WM8 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.749 AU once every 4.56 yr.

Amor Observations: 59
Orbital Period · P
4.56 yr
v(q)
35 km/s
v(Q)
9.2 km/s
Diameter · ≈
0.12 km
TJ
3
Eccentricity · e
0.5822

Orbit and dynamics

The path is an ellipse reaching 1.148 AU from the Sun at perihelion and 4.349 AU at aphelion, a radial span of 3.201 AU.

Applying Kepler's third law to a = 2.749 AU gives an orbital period of 4.56 yr, or about 1,665 days.

The high eccentricity (0.582) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 20.49° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 35 km/s at perihelion and falls to 9.2 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 = 22.36 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.12 km.

Observation record and orbit quality

The current orbit solution is based on 59 observations and has a weighted RMS residual of 0.4268 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
2.749 AU
Eccentricity
0.5822
Perihelion
1.148 AU
Aphelion
4.349468 AU
Inclination
20.49°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
44.74°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
22.36

Orbit Quality

RMS
0.42675
Condition
5
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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