SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 WF13

2015 WF13

2015 WF13 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.857 AU it takes 2.53 yr to circle the Sun.

Apollo Observations: 213
Orbital Period · P
2.53 yr
v(q)
35.9 km/s
v(Q)
13.3 km/s
Diameter · ≈
0.08 km
TJ
3.84
Eccentricity · e
0.4588

Orbit and dynamics

The path is an ellipse reaching 1.005 AU from the Sun at perihelion and 2.709 AU at aphelion, a radial span of 1.704 AU.

Applying Kepler's third law to a = 1.857 AU gives an orbital period of 2.53 yr, or about 924 days.

The high eccentricity (0.459) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 11.7° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.9 km/s at perihelion and falls to 13.3 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 23.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.08 km.

Observation record and orbit quality

The current orbit solution is based on 213 observations and has a weighted RMS residual of 0.2952 arcseconds.

Condition code U = 3 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
1.857 AU
Eccentricity
0.4588
Perihelion
1.005 AU
Aphelion
2.708992 AU
Inclination
11.7°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
55.23°

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
23.2

Orbit Quality

RMS
0.29521
Condition
3
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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