SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 RE3

2018 RE3

2018 RE3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.327 AU it takes 1.53 yr to circle the Sun.

Apollo Observations: 45
Orbital Period · P
1.53 yr
v(q)
39.1 km/s
v(Q)
17.1 km/s
Diameter · ≈
0.01 km
TJ
4.85
Eccentricity · e
0.3912

Orbit and dynamics

The path is an ellipse reaching 0.808 AU from the Sun at perihelion and 1.846 AU at aphelion, a radial span of 1.038 AU.

Applying Kepler's third law to a = 1.327 AU gives an orbital period of 1.53 yr, or about 558 days.

An eccentricity of 0.391 makes the orbit moderately elongated.

Its inclination of 2.27° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 39.1 km/s at perihelion and falls to 17.1 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 = 27.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 45 observations and has a weighted RMS residual of 0.6012 arcseconds.

Condition code U = 7 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
1.327 AU
Eccentricity
0.3912
Perihelion
0.808 AU
Aphelion
1.846122 AU
Inclination
2.27°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
348.66°

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

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2028-Feb-24 18:33 0.323012 AU
48321953 km
22.31 km/s
2041-Aug-20 04:02 0.258523 AU
38674438 km
22.33 km/s
2051-Jan-30 02:17 0.028598 AU
4278232 km
9.33 km/s
2054-Feb-19 11:00 0.183246 AU
27413152 km
19.15 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
27.3

Orbit Quality

RMS
0.60118
Condition
7
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. 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

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