SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 FJ2

2018 FJ2

2018 FJ2 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.277 AU once every 1.44 yr.

Amor Observations: 37
Orbital Period · P
1.44 yr
v(q)
30.2 km/s
v(Q)
23 km/s
Diameter · ≈
0.04 km
TJ
4.98
Eccentricity · e
0.1348

Orbit and dynamics

Between its closest point (1.105 AU) and its farthest (1.449 AU), the heliocentric distance changes by 0.344 AU over every revolution.

One full revolution takes 1.44 yr (527 days), computed from the semi-major axis of 1.277 AU.

An eccentricity of 0.135 makes the orbit moderately elongated.

A steep inclination of 22.41° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 30.2 km/s at perihelion and falls to 23 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 = 24.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 37 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4399 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
1.277 AU
Eccentricity
0.1348
Perihelion
1.105 AU
Aphelion
1.44914 AU
Inclination
22.41°
Orbital Period
— yr
Epoch
2458206.5
Mean Anomaly
2.4°

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
24.5

Orbit Quality

RMS
0.43986
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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