SpaceAtlas Space Object Data
NASA JPL SBDB · 2021 JC6

2021 JC6

2021 JC6 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.219 AU once every 3.31 yr.

Amor Observations: 35
Orbital Period · P
3.31 yr
v(q)
36.1 km/s
v(Q)
11.1 km/s
Diameter · ≈
0.03 km
TJ
3.45
Eccentricity · e
0.53

Orbit and dynamics

The path is an ellipse reaching 1.043 AU from the Sun at perihelion and 3.395 AU at aphelion, a radial span of 2.352 AU.

Applying Kepler's third law to a = 2.219 AU gives an orbital period of 3.31 yr, or about 1,207 days.

The high eccentricity (0.53) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 4.22° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 36.1 km/s at perihelion and falls to 11.1 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 25.25 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 35 observations and has a weighted RMS residual of 0.687 arcseconds.

Condition code U = 5 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
2.219 AU
Eccentricity
0.53
Perihelion
1.043 AU
Aphelion
3.39507 AU
Inclination
4.22°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
186.26°

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
2031-Apr-09 21:50 0.470502 AU
70386027 km
21.32 km/s
2054-Jul-12 17:32 0.144149 AU
21564368 km
11.74 km/s
2064-Apr-20 19:34 0.220370 AU
32966911 km
15.28 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
25.25

Orbit Quality

RMS
0.68697
Condition
5
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.

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