SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 UX12

2019 UX12

2019 UX12 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.015 AU it takes 1.02 yr to circle the Sun.

Apollo Observations: 21
Orbital Period · P
1.02 yr
v(q)
38.9 km/s
v(Q)
22.5 km/s
Diameter · ≈
0.01 km
TJ
5.97
Eccentricity · e
0.2675

Orbit and dynamics

The path is an ellipse reaching 0.744 AU from the Sun at perihelion and 1.287 AU at aphelion, a radial span of 0.543 AU.

Applying Kepler's third law to a = 1.015 AU gives an orbital period of 1.02 yr, or about 373 days.

An eccentricity of 0.268 makes the orbit moderately elongated.

The orbital plane is tilted 8.61° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 38.9 km/s at perihelion and falls to 22.5 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 = 28.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 21 observations and has a weighted RMS residual of 0.729 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
1.015 AU
Eccentricity
0.2675
Perihelion
0.744 AU
Aphelion
1.286512 AU
Inclination
8.61°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
240.8°

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
2054-Mar-16 04:17 0.188555 AU
28207401 km
20.63 km/s
2055-Mar-22 19:24 0.067851 AU
10150350 km
16.51 km/s
2064-Oct-24 02:34 0.002146 AU
321020 km
8.46 km/s
2065-Oct-28 21:12 0.001839 AU
275068 km
12.15 km/s
2066-Nov-03 15:43 0.093086 AU
13925438 km
16.17 km/s
2067-Nov-09 16:56 0.284189 AU
42514030 km
20.37 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
28.7

Orbit Quality

RMS
0.72903
Condition
7
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.

Keep exploring

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