SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 UG12

2019 UG12

2019 UG12 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.072 AU it takes 2.98 yr to circle the Sun.

Apollo Observations: 32
Orbital Period · P
2.98 yr
v(q)
39.8 km/s
v(Q)
10.8 km/s
Diameter · ≈
0.02 km
TJ
3.54
Eccentricity · e
0.5739

Orbit and dynamics

Between its closest point (0.883 AU) and its farthest (3.261 AU), the heliocentric distance changes by 2.378 AU over every revolution.

One full revolution takes 2.98 yr (1,089 days), computed from the semi-major axis of 2.072 AU.

The high eccentricity (0.574) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 7.29° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 39.8 km/s at perihelion and falls to 10.8 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 = 26.4 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 32 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5967 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
2.072 AU
Eccentricity
0.5739
Perihelion
0.883 AU
Aphelion
3.261121 AU
Inclination
7.29°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
64.57°

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
2028-Oct-11 05:50 0.231162 AU
34581394 km
19.23 km/s
2031-Oct-05 11:44 0.331284 AU
49559450 km
22.34 km/s
2034-Sep-28 09:44 0.458294 AU
68559824 km
26.02 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
26.4

Orbit Quality

RMS
0.5967
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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