SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 WP69

2011 WP69

2011 WP69 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.698 AU once every 2.21 yr.

Amor Observations: 111
Orbital Period · P
2.21 yr
v(q)
33.4 km/s
v(Q)
15.6 km/s
Diameter · ≈
0.09 km
TJ
4.1
Eccentricity · e
0.3629

Orbit and dynamics

Between its closest point (1.082 AU) and its farthest (2.314 AU), the heliocentric distance changes by 1.232 AU over every revolution.

One full revolution takes 2.21 yr (808 days), computed from the semi-major axis of 1.698 AU.

An eccentricity of 0.363 makes the orbit moderately elongated.

The orbital plane is tilted 13.7° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.4 km/s at perihelion and falls to 15.6 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 = 23.03 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

Astrometry from 111 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3503 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
1.698 AU
Eccentricity
0.3629
Perihelion
1.082 AU
Aphelion
2.314204 AU
Inclination
13.7°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
205.53°

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
2042-Nov-30 18:34 0.165884 AU
24815872 km
8.80 km/s
2053-Dec-14 00:51 0.117687 AU
17605707 km
10.57 km/s
2073-Nov-22 11:26 0.328913 AU
49204732 km
12.38 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
23.03

Orbit Quality

RMS
0.35026
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

Explore asteroids, comets and near-Earth objects with JPL orbital data.