SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 EF27

2016 EF27

2016 EF27 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.826 AU once every 2.47 yr.

Amor Observations: 43
Orbital Period · P
2.47 yr
v(q)
33 km/s
v(Q)
14.7 km/s
Diameter · ≈
0.08 km
TJ
3.93
Eccentricity · e
0.383

Orbit and dynamics

The path is an ellipse reaching 1.127 AU from the Sun at perihelion and 2.525 AU at aphelion, a radial span of 1.398 AU.

Applying Kepler's third law to a = 1.826 AU gives an orbital period of 2.47 yr, or about 901 days.

An eccentricity of 0.383 makes the orbit moderately elongated.

The orbital plane is tilted 8.53° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33 km/s at perihelion and falls to 14.7 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 = 23.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.08 km.

Observation record and orbit quality

The current orbit solution is based on 43 observations and has a weighted RMS residual of 0.5422 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
1.826 AU
Eccentricity
0.383
Perihelion
1.127 AU
Aphelion
2.525358 AU
Inclination
8.53°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
42.83°

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
2053-Mar-25 20:32 0.205702 AU
30772647 km
4.23 km/s
2058-Mar-21 08:27 0.291176 AU
43559257 km
10.19 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
23.3

Orbit Quality

RMS
0.54219
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

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