SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 EZ9

2018 EZ9

2018 EZ9 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.148 AU once every 1.23 yr.

Amor Observations: 7
Orbital Period · P
1.23 yr
v(q)
30.6 km/s
v(Q)
25.3 km/s
Diameter · ≈
0.01 km
TJ
5.45
Eccentricity · e
0.0945

Orbit and dynamics

Between its closest point (1.039 AU) and its farthest (1.256 AU), the heliocentric distance changes by 0.217 AU over every revolution.

One full revolution takes 1.23 yr (449 days), computed from the semi-major axis of 1.148 AU.

With e = 0.095, the orbit is close to circular.

The orbital plane is tilted 12.36° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 30.6 km/s at perihelion and falls to 25.3 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 = 27.07 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 7 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5666 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
1.148 AU
Eccentricity
0.0945
Perihelion
1.039 AU
Aphelion
1.256486 AU
Inclination
12.36°
Orbital Period
— yr
Epoch
2458184.5
Mean Anomaly
10.97°

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
27.07

Orbit Quality

RMS
0.56662
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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