SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 WG13

2015 WG13

2015 WG13 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.184 AU once every 3.23 yr.

Amor Observations: 106
Orbital Period · P
3.23 yr
v(q)
34.4 km/s
v(Q)
11.8 km/s
Diameter · ≈
0.11 km
TJ
3.5
Eccentricity · e
0.4893

Orbit and dynamics

Between its closest point (1.115 AU) and its farthest (3.253 AU), the heliocentric distance changes by 2.138 AU over every revolution.

One full revolution takes 3.23 yr (1,179 days), computed from the semi-major axis of 2.184 AU.

The high eccentricity (0.489) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 6.86° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.4 km/s at perihelion and falls to 11.8 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 = 22.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.11 km.

Observation record and orbit quality

Astrometry from 106 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3656 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
2.184 AU
Eccentricity
0.4893
Perihelion
1.115 AU
Aphelion
3.252631 AU
Inclination
6.86°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
93.59°

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
2044-Dec-22 13:56 0.236494 AU
35379018 km
9.36 km/s
2057-Nov-14 13:32 0.396929 AU
59379682 km
12.60 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
22.6

Orbit Quality

RMS
0.36565
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.

Keep exploring

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