SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 XG2

2018 XG2

2018 XG2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.028 AU it takes 1.04 yr to circle the Sun.

Apollo Observations: 41
Orbital Period · P
1.04 yr
v(q)
31.1 km/s
v(Q)
27.8 km/s
Diameter · ≈
0.03 km
TJ
5.93
Eccentricity · e
0.0558

Orbit and dynamics

The path is an ellipse reaching 0.971 AU from the Sun at perihelion and 1.085 AU at aphelion, a radial span of 0.114 AU.

Applying Kepler's third law to a = 1.028 AU gives an orbital period of 1.04 yr, or about 381 days.

With e = 0.056, the orbit is close to circular.

The orbital plane is tilted 10.87° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31.1 km/s at perihelion and falls to 27.8 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 = 25.17 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

The current orbit solution is based on 41 observations and has a weighted RMS residual of 0.4095 arcseconds.

Condition code U = 6 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
1.028 AU
Eccentricity
0.0558
Perihelion
0.971 AU
Aphelion
1.085362 AU
Inclination
10.87°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
119.28°

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
25.17

Orbit Quality

RMS
0.40953
Condition
6
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.