SpaceAtlas Space Object Data
NASA JPL SBDB · 2022 UD8

2022 UD8

2022 UD8 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.938 AU and a period of 0.91 yr.

Aten Observations: 21
Orbital Period · P
0.91 yr
v(q)
36.6 km/s
v(Q)
25.8 km/s
Diameter · ≈
0.05 km
TJ
6.37
Eccentricity · e
0.1723

Orbit and dynamics

Between its closest point (0.777 AU) and its farthest (1.1 AU), the heliocentric distance changes by 0.323 AU over every revolution.

One full revolution takes 0.91 yr (332 days), computed from the semi-major axis of 0.938 AU.

An eccentricity of 0.172 makes the orbit moderately elongated.

The orbital plane is tilted 10.82° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.6 km/s at perihelion and falls to 25.8 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 = 24.32 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

Astrometry from 21 individual observations underpins this orbit; the fit leaves an RMS residual of 0.658 arcseconds.

Condition code U = 4 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
0.9381 AU
Eccentricity
0.1723
Perihelion
0.777 AU
Aphelion
1.099735 AU
Inclination
10.82°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
191.89°

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
24.32

Orbit Quality

RMS
0.65795
Condition
4
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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