SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 TJ8

2020 TJ8

2020 TJ8 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.416 AU once every 1.68 yr.

Amor Observations: 103
Orbital Period · P
1.68 yr
v(q)
33.3 km/s
v(Q)
18.8 km/s
Diameter · ≈
0.04 km
TJ
4.67
Eccentricity · e
0.2767

Orbit and dynamics

The path is an ellipse reaching 1.024 AU from the Sun at perihelion and 1.808 AU at aphelion, a radial span of 0.784 AU.

Applying Kepler's third law to a = 1.416 AU gives an orbital period of 1.68 yr, or about 615 days.

An eccentricity of 0.277 makes the orbit moderately elongated.

The orbital plane is tilted 5.74° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.3 km/s at perihelion and falls to 18.8 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 = 24.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

The current orbit solution is based on 103 observations and has a weighted RMS residual of 0.5161 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
1.416 AU
Eccentricity
0.2767
Perihelion
1.024 AU
Aphelion
1.807807 AU
Inclination
5.74°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
98.57°

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
2047-Oct-26 07:29 0.299793 AU
44848409 km
12.26 km/s
2048-Feb-14 08:01 0.350226 AU
52393090 km
3.01 km/s
2052-Dec-02 04:59 0.039489 AU
5907432 km
4.40 km/s
2057-Sep-10 16:35 0.391266 AU
58532577 km
4.06 km/s
2058-Jan-13 00:52 0.372183 AU
55677808 km
14.73 km/s
2074-Oct-20 22:22 0.306152 AU
45799655 km
14.87 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
24.7

Orbit Quality

RMS
0.51615
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.

Keep exploring

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