SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 EU3

2018 EU3

2018 EU3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.447 AU it takes 1.74 yr to circle the Sun.

Apollo Observations: 37
Orbital Period · P
1.74 yr
v(q)
34.8 km/s
v(Q)
17.6 km/s
Diameter · ≈
0.06 km
TJ
4.52
Eccentricity · e
0.3269

Orbit and dynamics

The path is an ellipse reaching 0.974 AU from the Sun at perihelion and 1.92 AU at aphelion, a radial span of 0.946 AU.

Applying Kepler's third law to a = 1.447 AU gives an orbital period of 1.74 yr, or about 636 days.

An eccentricity of 0.327 makes the orbit moderately elongated.

A steep inclination of 21.53° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 34.8 km/s at perihelion and falls to 17.6 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 = 23.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

The current orbit solution is based on 37 observations and has a weighted RMS residual of 0.5157 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
1.447 AU
Eccentricity
0.3269
Perihelion
0.974 AU
Aphelion
1.920024 AU
Inclination
21.53°
Orbital Period
— yr
Epoch
2458191.5
Mean Anomaly
32.3°

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
23.9

Orbit Quality

RMS
0.51571
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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