SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 UX9

2019 UX9

2019 UX9 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.693 AU it takes 4.42 yr to circle the Sun.

Apollo Observations: 133
Orbital Period · P
4.42 yr
v(q)
40.6 km/s
v(Q)
8.1 km/s
Diameter · ≈
0.12 km
TJ
2.99
Eccentricity · e
0.6665

Orbit and dynamics

Between its closest point (0.898 AU) and its farthest (4.488 AU), the heliocentric distance changes by 3.59 AU over every revolution.

One full revolution takes 4.42 yr (1,614 days), computed from the semi-major axis of 2.693 AU.

The high eccentricity (0.666) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 10.06° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 40.6 km/s at perihelion and falls to 8.1 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 = 22.43 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.12 km.

Observation record and orbit quality

Astrometry from 133 individual observations underpins this orbit; the fit leaves an RMS residual of 0.35 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
2.693 AU
Eccentricity
0.6665
Perihelion
0.898 AU
Aphelion
4.487885 AU
Inclination
10.06°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
165.04°

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
22.43

Orbit Quality

RMS
0.34996
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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