SpaceAtlas Space Object Data
NASA JPL SBDB · 2025 UT12

2025 UT12

2025 UT12 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 3.253 AU it takes 5.87 yr to circle the Sun.

Apollo Observations: 52
Orbital Period · P
5.87 yr
v(q)
84.4 km/s
v(Q)
3.2 km/s
Diameter · ≈
0.27 km
TJ
2.09
Eccentricity · e
0.9263

Orbit and dynamics

The path is an ellipse reaching 0.24 AU from the Sun at perihelion and 6.266 AU at aphelion, a radial span of 6.026 AU.

Applying Kepler's third law to a = 3.253 AU gives an orbital period of 5.87 yr, or about 2,143 days.

The high eccentricity (0.926) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 35.18° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 84.4 km/s at perihelion and falls to 3.2 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 = 20.59 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.27 km.

Observation record and orbit quality

The current orbit solution is based on 52 observations and has a weighted RMS residual of 0.5988 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
3.253 AU
Eccentricity
0.9263
Perihelion
0.24 AU
Aphelion
6.266254 AU
Inclination
35.18°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
26.17°

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
20.59

Orbit Quality

RMS
0.5988
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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