SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 JJ2

2017 JJ2

2017 JJ2 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.692 AU and a period of 0.58 yr.

Aten Observations: 27
Orbital Period · P
0.58 yr
v(q)
74.8 km/s
v(Q)
17.2 km/s
Diameter · ≈
0.03 km
TJ
8.08
Eccentricity · e
0.6265

Orbit and dynamics

The path is an ellipse reaching 0.258 AU from the Sun at perihelion and 1.125 AU at aphelion, a radial span of 0.867 AU.

Applying Kepler's third law to a = 0.692 AU gives an orbital period of 0.58 yr, or about 210 days.

The high eccentricity (0.626) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 12.16° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 74.8 km/s at perihelion and falls to 17.2 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 = 25.1 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

The current orbit solution is based on 27 observations and has a weighted RMS residual of 0.5976 arcseconds.

Condition code U = 8 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
0.6915 AU
Eccentricity
0.6265
Perihelion
0.258 AU
Aphelion
1.124725 AU
Inclination
12.16°
Orbital Period
— yr
Epoch
2457878.5
Mean Anomaly
123.04°

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
25.1

Orbit Quality

RMS
0.59757
Condition
8
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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