SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 JA

2016 JA

2016 JA belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.013 AU it takes 1.02 yr to circle the Sun.

Apollo Observations: 51
Orbital Period · P
1.02 yr
v(q)
39 km/s
v(Q)
22.5 km/s
Diameter · ≈
0.01 km
TJ
5.99
Eccentricity · e
0.2683

Orbit and dynamics

The path is an ellipse reaching 0.741 AU from the Sun at perihelion and 1.285 AU at aphelion, a radial span of 0.544 AU.

Applying Kepler's third law to a = 1.013 AU gives an orbital period of 1.02 yr, or about 372 days.

An eccentricity of 0.268 makes the orbit moderately elongated.

Its inclination of 0.05° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 39 km/s at perihelion and falls to 22.5 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 = 27.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 51 observations and has a weighted RMS residual of 0.5787 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
1.013 AU
Eccentricity
0.2683
Perihelion
0.741 AU
Aphelion
1.284788 AU
Inclination
0.05°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
43.68°

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
27.6

Orbit Quality

RMS
0.57872
Condition
6
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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