SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 EF85

2016 EF85

2016 EF85 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.546 AU once every 1.92 yr.

Amor Observations: 29
Orbital Period · P
1.92 yr
v(q)
33.2 km/s
v(Q)
17.3 km/s
Diameter · ≈
0.04 km
TJ
4.39
Eccentricity · e
0.3166

Orbit and dynamics

The path is an ellipse reaching 1.057 AU from the Sun at perihelion and 2.035 AU at aphelion, a radial span of 0.978 AU.

Applying Kepler's third law to a = 1.546 AU gives an orbital period of 1.92 yr, or about 702 days.

An eccentricity of 0.317 makes the orbit moderately elongated.

The orbital plane is tilted 8.32° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.2 km/s at perihelion and falls to 17.3 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 = 25 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

The current orbit solution is based on 29 observations and has a weighted RMS residual of 0.5982 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
1.546 AU
Eccentricity
0.3166
Perihelion
1.057 AU
Aphelion
2.035464 AU
Inclination
8.32°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
96.76°

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
2039-Jun-06 21:24 0.354163 AU
52982003 km
15.53 km/s
2041-Apr-03 02:29 0.074424 AU
11133682 km
6.51 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
25.0

Orbit Quality

RMS
0.59823
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.