SpaceAtlas Space Object Data
NASA JPL SBDB · 2012 XG55

2012 XG55

2012 XG55 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.704 AU once every 2.22 yr.

Amor Observations: 24
Orbital Period · P
2.22 yr
v(q)
32 km/s
v(Q)
16.3 km/s
Diameter · ≈
0.07 km
TJ
4.13
Eccentricity · e
0.3269

Orbit and dynamics

The path is an ellipse reaching 1.147 AU from the Sun at perihelion and 2.261 AU at aphelion, a radial span of 1.114 AU.

Applying Kepler's third law to a = 1.704 AU gives an orbital period of 2.22 yr, or about 812 days.

An eccentricity of 0.327 makes the orbit moderately elongated.

Its inclination of 4.29° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 32 km/s at perihelion and falls to 16.3 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 = 23.4 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

The current orbit solution is based on 24 observations and has a weighted RMS residual of 0.5752 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
1.704 AU
Eccentricity
0.3269
Perihelion
1.147 AU
Aphelion
2.261038 AU
Inclination
4.29°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
11.46°

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

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
23.4

Orbit Quality

RMS
0.57523
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.

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