SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 GZ7

2018 GZ7

2018 GZ7 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 7.461 AU once every 20.4 yr.

Amor Observations: 7
Orbital Period · P
20.4 yr
v(q)
38.4 km/s
v(Q)
3.1 km/s
Diameter · ≈
1.04 km
TJ
1.62
Eccentricity · e
0.8511

Orbit and dynamics

The path is an ellipse reaching 1.111 AU from the Sun at perihelion and 13.811 AU at aphelion, a radial span of 12.7 AU.

Applying Kepler's third law to a = 7.461 AU gives an orbital period of 20.4 yr, or about 7,444 days.

The high eccentricity (0.851) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 42.58° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 38.4 km/s at perihelion and falls to 3.1 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 = 17.66 and an assumed geometric albedo of 0.14, the diameter works out to roughly 1.04 km.

Observation record and orbit quality

The current orbit solution is based on 7 observations and has a weighted RMS residual of 0.24 arcseconds.

Condition code U = 9 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
7.461 AU
Eccentricity
0.8511
Perihelion
1.111 AU
Aphelion
13.811057 AU
Inclination
42.58°
Orbital Period
— yr
Epoch
2460600.5
Mean Anomaly
106.3°

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
17.66

Orbit Quality

RMS
0.24
Condition
9
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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