SpaceAtlas Space Object Data
NASA JPL SBDB · 2003 UX5

2003 UX5

2003 UX5 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.441 AU it takes 1.73 yr to circle the Sun.

Apollo Observations: 315
Orbital Period · P
1.73 yr
v(q)
35.4 km/s
v(Q)
17.4 km/s
Diameter · ≈
0.31 km
TJ
4.53
Eccentricity · e
0.3409

Orbit and dynamics

The path is an ellipse reaching 0.95 AU from the Sun at perihelion and 1.932 AU at aphelion, a radial span of 0.982 AU.

Applying Kepler's third law to a = 1.441 AU gives an orbital period of 1.73 yr, or about 632 days.

An eccentricity of 0.341 makes the orbit moderately elongated.

A steep inclination of 21.44° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 35.4 km/s at perihelion and falls to 17.4 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 = 20.28 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.31 km.

Observation record and orbit quality

The current orbit solution is based on 315 observations and has a weighted RMS residual of 0.4878 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
1.441 AU
Eccentricity
0.3409
Perihelion
0.95 AU
Aphelion
1.932237 AU
Inclination
21.44°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
353.96°

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
2029-Oct-29 18:04 0.384510 AU
57521821 km
21.12 km/s
2041-Dec-05 07:17 0.347409 AU
51971679 km
12.38 km/s
2042-Mar-14 11:34 0.388933 AU
58183531 km
12.32 km/s
2048-Nov-08 23:22 0.162897 AU
24368993 km
16.06 km/s
2049-Apr-10 01:29 0.451776 AU
67584802 km
11.11 km/s
2061-Mar-18 17:04 0.489749 AU
73265475 km
17.48 km/s
2067-Nov-19 01:42 0.067976 AU
10168999 km
12.80 km/s
2068-Mar-29 14:36 0.388907 AU
58179665 km
10.51 km/s
2074-Oct-27 10:52 0.441871 AU
66103033 km
22.54 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
20.28

Orbit Quality

RMS
0.48777
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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