SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 JM17

2016 JM17

2016 JM17 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.423 AU it takes 3.77 yr to circle the Sun.

Apollo Observations: 88
Orbital Period · P
3.77 yr
v(q)
55.4 km/s
v(Q)
6.6 km/s
Diameter · ≈
0.43 km
TJ
2.93
Eccentricity · e
0.7868

Orbit and dynamics

The path is an ellipse reaching 0.517 AU from the Sun at perihelion and 4.329 AU at aphelion, a radial span of 3.812 AU.

Applying Kepler's third law to a = 2.423 AU gives an orbital period of 3.77 yr, or about 1,378 days.

The high eccentricity (0.787) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 21.01° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 55.4 km/s at perihelion and falls to 6.6 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

The measured diameter is 0.66 km, a value from direct size determination rather than from brightness alone.

Its geometric albedo of 0.059 indicates a very dark, carbonaceous-type surface.

Observation record and orbit quality

The current orbit solution is based on 88 observations and has a weighted RMS residual of 0.4458 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
2.423 AU
Eccentricity
0.7868
Perihelion
0.517 AU
Aphelion
4.329416 AU
Inclination
21.01°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
218.72°

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
0.661 km
Albedo
0.059
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
19.6

Orbit Quality

RMS
0.44583
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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