SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 EN156

2016 EN156

2016 EN156 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.288 AU it takes 1.46 yr to circle the Sun.

Apollo Observations: 113
Orbital Period · P
1.46 yr
v(q)
35.6 km/s
v(Q)
19.3 km/s
Diameter · ≈
0.01 km
TJ
4.99
Eccentricity · e
0.2967

Orbit and dynamics

Between its closest point (0.906 AU) and its farthest (1.67 AU), the heliocentric distance changes by 0.764 AU over every revolution.

One full revolution takes 1.46 yr (534 days), computed from the semi-major axis of 1.288 AU.

An eccentricity of 0.297 makes the orbit moderately elongated.

Its inclination of 3.65° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.6 km/s at perihelion and falls to 19.3 km/s at aphelion.

Because q < 1 AU and Q > 1 AU, this orbit geometrically intersects the region of Earth's orbit.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 27.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 113 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3356 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
1.288 AU
Eccentricity
0.2967
Perihelion
0.906 AU
Aphelion
1.67015 AU
Inclination
3.65°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
327.71°

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
2032-Jan-21 00:32 0.419791 AU
62799914 km
7.13 km/s
2032-Jul-24 02:28 0.074383 AU
11127609 km
10.70 km/s
2035-Aug-23 18:58 0.314786 AU
47091249 km
5.14 km/s
2038-Feb-23 11:49 0.374553 AU
56032298 km
19.36 km/s
2051-Aug-07 12:25 0.174159 AU
26053781 km
18.02 km/s
2079-Feb-26 05:45 0.180620 AU
27020305 km
18.02 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
27.8

Orbit Quality

RMS
0.33557
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

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