SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 XM5

2018 XM5

2018 XM5 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.836 AU and a period of 0.76 yr.

Aten Observations: 44
Orbital Period · P
0.76 yr
v(q)
44.5 km/s
v(Q)
23.8 km/s
Diameter · ≈
0.05 km
TJ
6.98
Eccentricity · e
0.3026

Orbit and dynamics

Between its closest point (0.583 AU) and its farthest (1.089 AU), the heliocentric distance changes by 0.506 AU over every revolution.

One full revolution takes 0.76 yr (279 days), computed from the semi-major axis of 0.836 AU.

An eccentricity of 0.303 makes the orbit moderately elongated.

The orbital plane is tilted 10.17° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 44.5 km/s at perihelion and falls to 23.8 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 = 24.4 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

Astrometry from 44 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5834 arcseconds.

Condition code U = 7 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
0.8358 AU
Eccentricity
0.3026
Perihelion
0.583 AU
Aphelion
1.088713 AU
Inclination
10.17°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
133.93°

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
24.4

Orbit Quality

RMS
0.58344
Condition
7
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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