SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 JG2

2018 JG2

2018 JG2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.901 AU it takes 2.62 yr to circle the Sun.

Apollo Observations: 88
Orbital Period · P
2.62 yr
v(q)
35.7 km/s
v(Q)
13.1 km/s
Diameter · ≈
0.06 km
TJ
3.8
Eccentricity · e
0.4648

Orbit and dynamics

The path is an ellipse reaching 1.017 AU from the Sun at perihelion and 2.785 AU at aphelion, a radial span of 1.768 AU.

Applying Kepler's third law to a = 1.901 AU gives an orbital period of 2.62 yr, or about 957 days.

The high eccentricity (0.465) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 4.76° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.7 km/s at perihelion and falls to 13.1 km/s at aphelion.

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 88 observations and has a weighted RMS residual of 0.5536 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
1.901 AU
Eccentricity
0.4648
Perihelion
1.017 AU
Aphelion
2.784585 AU
Inclination
4.76°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
20.46°

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
2039-Apr-24 00:51 0.129923 AU
19436195 km
13.07 km/s
2052-Jul-26 17:06 0.183362 AU
27430605 km
14.47 km/s
2060-Apr-06 19:17 0.377327 AU
56447382 km
21.28 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
23.9

Orbit Quality

RMS
0.55359
Condition
6
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.

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