SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 JE18

2016 JE18

2016 JE18 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.329 AU it takes 1.53 yr to circle the Sun.

Apollo Observations: 67
Orbital Period · P
1.53 yr
v(q)
32.9 km/s
v(Q)
20.3 km/s
Diameter · ≈
0.02 km
TJ
4.87
Eccentricity · e
0.2385

Orbit and dynamics

Between its closest point (1.012 AU) and its farthest (1.646 AU), the heliocentric distance changes by 0.634 AU over every revolution.

One full revolution takes 1.53 yr (560 days), computed from the semi-major axis of 1.329 AU.

An eccentricity of 0.238 makes the orbit moderately elongated.

The orbital plane is tilted 13.8° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.9 km/s at perihelion and falls to 20.3 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 26.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 67 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4162 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.329 AU
Eccentricity
0.2385
Perihelion
1.012 AU
Aphelion
1.645966 AU
Inclination
13.8°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
192.58°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
26.3

Orbit Quality

RMS
0.41616
Condition
7
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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