SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 WH

2013 WH

2013 WH is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.264 AU once every 3.41 yr.

Amor Observations: 60
Orbital Period · P
3.41 yr
v(q)
32.4 km/s
v(Q)
12.1 km/s
Diameter · ≈
0.2 km
TJ
3.4
Eccentricity · e
0.456

Orbit and dynamics

The path is an ellipse reaching 1.231 AU from the Sun at perihelion and 3.296 AU at aphelion, a radial span of 2.065 AU.

Applying Kepler's third law to a = 2.264 AU gives an orbital period of 3.41 yr, or about 1,244 days.

The high eccentricity (0.456) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 20.59° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 32.4 km/s at perihelion and falls to 12.1 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 = 21.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.2 km.

Observation record and orbit quality

The current orbit solution is based on 60 observations and has a weighted RMS residual of 0.5336 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
2.264 AU
Eccentricity
0.456
Perihelion
1.231 AU
Aphelion
3.296384 AU
Inclination
20.59°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
249.49°

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
2030-Nov-21 11:49 0.310137 AU
46395825 km
12.97 km/s
2047-Nov-21 02:40 0.345942 AU
51752121 km
14.48 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
21.3

Orbit Quality

RMS
0.5336
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.

Keep exploring

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