SpaceAtlas Space Object Data
NASA JPL SBDB · 2012 XJ134

2012 XJ134

2012 XJ134 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.566 AU it takes 4.11 yr to circle the Sun.

Apollo Observations: 197
Orbital Period · P
4.11 yr
v(q)
47.9 km/s
v(Q)
7.2 km/s
Diameter · ≈
0.18 km
TJ
2.98
Eccentricity · e
0.7379

Orbit and dynamics

The path is an ellipse reaching 0.672 AU from the Sun at perihelion and 4.459 AU at aphelion, a radial span of 3.787 AU.

Applying Kepler's third law to a = 2.566 AU gives an orbital period of 4.11 yr, or about 1,501 days.

The high eccentricity (0.738) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 2.47° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 47.9 km/s at perihelion and falls to 7.2 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 = 21.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.18 km.

Observation record and orbit quality

The current orbit solution is based on 197 observations and has a weighted RMS residual of 0.4076 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
2.566 AU
Eccentricity
0.7379
Perihelion
0.672 AU
Aphelion
4.459451 AU
Inclination
2.47°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
112.41°

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
2041-Jun-10 11:56 0.332408 AU
49727601 km
32.57 km/s
2045-Jul-09 07:58 0.043915 AU
6569576 km
18.13 km/s
2049-Sep-21 16:34 0.350302 AU
52404445 km
18.97 km/s
2053-Dec-04 04:01 0.132039 AU
19752749 km
17.32 km/s
2057-Dec-24 00:25 0.142818 AU
21365217 km
26.33 km/s
2062-Jan-08 22:16 0.442706 AU
66227843 km
36.18 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
21.5

Orbit Quality

RMS
0.40764
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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