SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 HE3

2020 HE3

2020 HE3 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.233 AU once every 1.37 yr.

Amor Observations: 38
Orbital Period · P
1.37 yr
v(q)
28.5 km/s
v(Q)
25.2 km/s
Diameter · ≈
0.09 km
TJ
5.09
Eccentricity · e
0.0618

Orbit and dynamics

Between its closest point (1.157 AU) and its farthest (1.309 AU), the heliocentric distance changes by 0.152 AU over every revolution.

One full revolution takes 1.37 yr (500 days), computed from the semi-major axis of 1.233 AU.

With e = 0.062, the orbit is close to circular.

A steep inclination of 27.21° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 28.5 km/s at perihelion and falls to 25.2 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 = 23 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

Astrometry from 38 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3857 arcseconds.

Condition code U = 8 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
1.233 AU
Eccentricity
0.0618
Perihelion
1.157 AU
Aphelion
1.309199 AU
Inclination
27.21°
Orbital Period
— yr
Epoch
2458960.5
Mean Anomaly
22.56°

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
23.0

Orbit Quality

RMS
0.38573
Condition
8
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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