SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 JR

2020 JR

2020 JR belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.386 AU it takes 1.63 yr to circle the Sun.

Apollo Observations: 159
Orbital Period · P
1.63 yr
v(q)
36.1 km/s
v(Q)
17.7 km/s
Diameter · ≈
0.03 km
TJ
4.72
Eccentricity · e
0.3413

Orbit and dynamics

The path is an ellipse reaching 0.913 AU from the Sun at perihelion and 1.859 AU at aphelion, a radial span of 0.946 AU.

Applying Kepler's third law to a = 1.386 AU gives an orbital period of 1.63 yr, or about 596 days.

An eccentricity of 0.341 makes the orbit moderately elongated.

Its inclination of 1.76° 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 17.7 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 159 observations and has a weighted RMS residual of 0.4318 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
1.386 AU
Eccentricity
0.3413
Perihelion
0.913 AU
Aphelion
1.859042 AU
Inclination
1.76°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
288.84°

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
2033-Jun-02 15:33 0.324708 AU
48575552 km
18.42 km/s
2050-Dec-04 08:25 0.457524 AU
68444668 km
6.86 km/s
2051-May-23 10:29 0.141045 AU
21099968 km
12.93 km/s
2056-Jan-19 15:32 0.068534 AU
10252589 km
10.30 km/s
2056-Jun-19 21:30 0.405292 AU
60630756 km
5.12 km/s
2068-Dec-28 23:57 0.327841 AU
49044319 km
3.44 km/s
2069-May-04 17:00 0.010464 AU
1565382 km
7.30 km/s
2073-Dec-31 12:04 0.252603 AU
37788820 km
20.00 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
25.1

Orbit Quality

RMS
0.43177
Condition
6
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.

Keep exploring

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