SpaceAtlas Space Object Data
NASA JPL SBDB · 2003 UG22

2003 UG22

2003 UG22 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.424 AU it takes 1.70 yr to circle the Sun.

Apollo Observations: 162
Orbital Period · P
1.70 yr
v(q)
36.1 km/s
v(Q)
17.2 km/s
Diameter · ≈
0.2 km
TJ
4.57
Eccentricity · e
0.3542

Orbit and dynamics

The path is an ellipse reaching 0.92 AU from the Sun at perihelion and 1.928 AU at aphelion, a radial span of 1.008 AU.

Applying Kepler's third law to a = 1.424 AU gives an orbital period of 1.70 yr, or about 621 days.

An eccentricity of 0.354 makes the orbit moderately elongated.

A steep inclination of 20.3° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 36.1 km/s at perihelion and falls to 17.2 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 = 21.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.2 km.

Observation record and orbit quality

The current orbit solution is based on 162 observations and has a weighted RMS residual of 0.5866 arcseconds.

Condition code U = 0 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

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
1.424 AU
Eccentricity
0.3542
Perihelion
0.92 AU
Aphelion
1.928381 AU
Inclination
20.3°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
154.83°

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
2032-May-08 14:56 0.420895 AU
62965061 km
21.69 km/s
2037-May-13 23:59 0.301796 AU
45148068 km
10.95 km/s
2037-Oct-11 07:43 0.215126 AU
32182424 km
11.27 km/s
2042-Oct-28 17:50 0.451782 AU
67585568 km
23.96 km/s
2049-May-07 04:11 0.465991 AU
69711298 km
22.99 km/s
2054-May-16 03:02 0.270568 AU
40476362 km
11.20 km/s
2054-Oct-11 23:56 0.257991 AU
38594923 km
10.84 km/s
2059-Oct-27 02:53 0.403617 AU
60380208 km
22.64 km/s
2071-May-17 20:06 0.241432 AU
36117726 km
11.67 km/s
2071-Oct-13 20:36 0.306681 AU
45878869 km
10.56 km/s
2076-Oct-24 06:18 0.348811 AU
52181351 km
21.17 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
21.2

Orbit Quality

RMS
0.58661
Condition
0
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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