SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 ES3

2018 ES3

2018 ES3 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.925 AU and a period of 0.89 yr.

Aten Observations: 29
Orbital Period · P
0.89 yr
v(q)
39.7 km/s
v(Q)
24.1 km/s
Diameter · ≈
0.04 km
TJ
6.42
Eccentricity · e
0.244

Orbit and dynamics

The path is an ellipse reaching 0.7 AU from the Sun at perihelion and 1.151 AU at aphelion, a radial span of 0.451 AU.

Applying Kepler's third law to a = 0.925 AU gives an orbital period of 0.89 yr, or about 325 days.

An eccentricity of 0.244 makes the orbit moderately elongated.

The orbital plane is tilted 14.17° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 39.7 km/s at perihelion and falls to 24.1 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 = 24.64 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 29 observations and has a weighted RMS residual of 0.6178 arcseconds.

Condition code U = 4 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
0.9254 AU
Eccentricity
0.244
Perihelion
0.7 AU
Aphelion
1.151198 AU
Inclination
14.17°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
301.56°

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
24.64

Orbit Quality

RMS
0.61778
Condition
4
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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