SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 AP164

2016 AP164

2016 AP164 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.961 AU once every 2.75 yr.

Amor Observations: 91
Orbital Period · P
2.75 yr
v(q)
31.6 km/s
v(Q)
14.3 km/s
Diameter · ≈
0.16 km
TJ
3.78
Eccentricity · e
0.3768

Orbit and dynamics

The path is an ellipse reaching 1.222 AU from the Sun at perihelion and 2.7 AU at aphelion, a radial span of 1.478 AU.

Applying Kepler's third law to a = 1.961 AU gives an orbital period of 2.75 yr, or about 1,003 days.

An eccentricity of 0.377 makes the orbit moderately elongated.

The orbital plane is tilted 7.8° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31.6 km/s at perihelion and falls to 14.3 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 = 21.72 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 91 observations and has a weighted RMS residual of 0.4216 arcseconds.

Condition code U = 4 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
1.961 AU
Eccentricity
0.3768
Perihelion
1.222 AU
Aphelion
2.699905 AU
Inclination
7.8°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
260.02°

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
2027-Mar-16 16:29 0.256457 AU
38365387 km
4.06 km/s
2038-Mar-20 14:25 0.244832 AU
36626293 km
4.03 km/s
2049-Mar-25 23:26 0.250660 AU
37498134 km
3.98 km/s
2060-Apr-01 06:03 0.284427 AU
42549707 km
3.97 km/s
2071-Apr-07 17:24 0.319634 AU
47816518 km
4.00 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
21.72

Orbit Quality

RMS
0.42162
Condition
4
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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