SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 JR1

2020 JR1

2020 JR1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.2 AU it takes 1.31 yr to circle the Sun.

Apollo Observations: 46
Orbital Period · P
1.31 yr
v(q)
34.2 km/s
v(Q)
21.6 km/s
Diameter · ≈
0.01 km
TJ
5.27
Eccentricity · e
0.227

Orbit and dynamics

Between its closest point (0.928 AU) and its farthest (1.472 AU), the heliocentric distance changes by 0.544 AU over every revolution.

One full revolution takes 1.31 yr (480 days), computed from the semi-major axis of 1.2 AU.

An eccentricity of 0.227 makes the orbit moderately elongated.

Its inclination of 1.12° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 34.2 km/s at perihelion and falls to 21.6 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

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

Astrometry from 46 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4013 arcseconds.

Condition code U = 7 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
1.2 AU
Eccentricity
0.227
Perihelion
0.928 AU
Aphelion
1.4724 AU
Inclination
1.12°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
177.06°

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
2029-Jan-10 17:09 0.483485 AU
72328393 km
8.64 km/s
2033-Feb-04 03:11 0.466189 AU
69740955 km
8.49 km/s
2037-Oct-05 23:57 0.122867 AU
18380628 km
13.54 km/s
2045-May-14 11:35 0.007112 AU
1063968 km
8.93 km/s
2049-Apr-24 23:26 0.408993 AU
61184527 km
19.94 km/s
2049-Dec-27 01:22 0.449348 AU
67221474 km
8.25 km/s
2054-Jan-23 09:25 0.483424 AU
72319178 km
8.64 km/s
2058-Feb-20 13:04 0.422841 AU
63256092 km
7.87 km/s
2058-Oct-12 14:02 0.289624 AU
43327204 km
17.34 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
27.6

Orbit Quality

RMS
0.4013
Condition
7
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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