SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 SE4

2020 SE4

2020 SE4 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.319 AU once every 3.53 yr.

Amor Observations: 141
Orbital Period · P
3.53 yr
v(q)
36.2 km/s
v(Q)
10.6 km/s
Diameter · ≈
0.29 km
TJ
3.31
Eccentricity · e
0.5474

Orbit and dynamics

Between its closest point (1.05 AU) and its farthest (3.588 AU), the heliocentric distance changes by 2.538 AU over every revolution.

One full revolution takes 3.53 yr (1,290 days), computed from the semi-major axis of 2.319 AU.

The high eccentricity (0.547) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 17.43° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.2 km/s at perihelion and falls to 10.6 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 = 20.41 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.29 km.

Observation record and orbit quality

Astrometry from 141 individual observations underpins this orbit; the fit leaves an RMS residual of 0.239 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
2.319 AU
Eccentricity
0.5474
Perihelion
1.05 AU
Aphelion
3.588421 AU
Inclination
17.43°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
220.1°

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
20.41

Orbit Quality

RMS
0.23899
Condition
5
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.