SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 WK14

2011 WK14

2011 WK14 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.689 AU once every 2.20 yr.

Amor Observations: 53
Orbital Period · P
2.20 yr
v(q)
29.4 km/s
v(Q)
17.9 km/s
Diameter · ≈
0.16 km
TJ
4.19
Eccentricity · e
0.2439

Orbit and dynamics

The path is an ellipse reaching 1.277 AU from the Sun at perihelion and 2.101 AU at aphelion, a radial span of 0.824 AU.

Applying Kepler's third law to a = 1.689 AU gives an orbital period of 2.20 yr, or about 802 days.

An eccentricity of 0.244 makes the orbit moderately elongated.

Its inclination of 1.96° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 29.4 km/s at perihelion and falls to 17.9 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 = 21.73 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.16 km.

Observation record and orbit quality

The current orbit solution is based on 53 observations and has a weighted RMS residual of 0.5546 arcseconds.

Condition code U = 0 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

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
1.689 AU
Eccentricity
0.2439
Perihelion
1.277 AU
Aphelion
2.100947 AU
Inclination
1.96°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
175.81°

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
2033-Dec-29 06:22 0.376788 AU
56366613 km
2.18 km/s
2045-Jan-14 18:02 0.320235 AU
47906436 km
1.36 km/s
2056-Jan-31 16:35 0.292892 AU
43815985 km
1.15 km/s
2067-Feb-15 20:56 0.303177 AU
45354588 km
1.36 km/s
2078-Mar-02 23:43 0.344500 AU
51536427 km
1.85 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
21.73

Orbit Quality

RMS
0.55457
Condition
0
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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