SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 FC3

2018 FC3

2018 FC3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.842 AU it takes 2.50 yr to circle the Sun.

Apollo Observations: 29
Orbital Period · P
2.50 yr
v(q)
41.5 km/s
v(Q)
11.6 km/s
Diameter · ≈
0.01 km
TJ
3.8
Eccentricity · e
0.5637

Orbit and dynamics

The path is an ellipse reaching 0.804 AU from the Sun at perihelion and 2.88 AU at aphelion, a radial span of 2.076 AU.

Applying Kepler's third law to a = 1.842 AU gives an orbital period of 2.50 yr, or about 913 days.

The high eccentricity (0.564) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 9.09° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 41.5 km/s at perihelion and falls to 11.6 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 = 27.5 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 29 observations and has a weighted RMS residual of 0.3559 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
1.842 AU
Eccentricity
0.5637
Perihelion
0.804 AU
Aphelion
2.880335 AU
Inclination
9.09°
Orbital Period
— yr
Epoch
2458197.5
Mean Anomaly
341.48°

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
27.5

Orbit Quality

RMS
0.35592
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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