SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 SN

2020 SN

2020 SN is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.572 AU once every 1.97 yr.

Amor Observations: 131
Orbital Period · P
1.97 yr
v(q)
34.3 km/s
v(Q)
16.4 km/s
Diameter · ≈
0.04 km
TJ
4.33
Eccentricity · e
0.3524

Orbit and dynamics

Between its closest point (1.018 AU) and its farthest (2.126 AU), the heliocentric distance changes by 1.108 AU over every revolution.

One full revolution takes 1.97 yr (720 days), computed from the semi-major axis of 1.572 AU.

An eccentricity of 0.352 makes the orbit moderately elongated.

The orbital plane is tilted 9° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.3 km/s at perihelion and falls to 16.4 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 = 24.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 131 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3568 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
1.572 AU
Eccentricity
0.3524
Perihelion
1.018 AU
Aphelion
2.125973 AU
Inclination
9.0°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
315.54°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
24.8

Orbit Quality

RMS
0.35679
Condition
6
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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