SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 TN

2020 TN

2020 TN belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.126 AU it takes 1.19 yr to circle the Sun.

Apollo Observations: 38
Orbital Period · P
1.19 yr
v(q)
34.2 km/s
v(Q)
23.1 km/s
Diameter · ≈
0.02 km
TJ
5.5
Eccentricity · e
0.1942

Orbit and dynamics

The path is an ellipse reaching 0.907 AU from the Sun at perihelion and 1.345 AU at aphelion, a radial span of 0.438 AU.

Applying Kepler's third law to a = 1.126 AU gives an orbital period of 1.19 yr, or about 436 days.

An eccentricity of 0.194 makes the orbit moderately elongated.

The orbital plane is tilted 15.52° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.2 km/s at perihelion and falls to 23.1 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 = 26.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 38 observations and has a weighted RMS residual of 0.4904 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
1.126 AU
Eccentricity
0.1942
Perihelion
0.907 AU
Aphelion
1.344669 AU
Inclination
15.52°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
214.23°

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
2032-Sep-25 20:40 0.200239 AU
29955356 km
17.09 km/s
2040-Mar-24 20:58 0.204041 AU
30524141 km
17.91 km/s
2046-Mar-20 20:10 0.111383 AU
16662719 km
13.25 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
26.7

Orbit Quality

RMS
0.49044
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.

Keep exploring

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