SpaceAtlas Space Object Data
NASA JPL SBDB · 2003 UX26

2003 UX26

2003 UX26 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.155 AU it takes 1.24 yr to circle the Sun.

Apollo Observations: 69
Orbital Period · P
1.24 yr
v(q)
40.7 km/s
v(Q)
18.9 km/s
Diameter · ≈
0.04 km
TJ
5.38
Eccentricity · e
0.3655

Orbit and dynamics

The path is an ellipse reaching 0.733 AU from the Sun at perihelion and 1.577 AU at aphelion, a radial span of 0.844 AU.

Applying Kepler's third law to a = 1.155 AU gives an orbital period of 1.24 yr, or about 453 days.

An eccentricity of 0.365 makes the orbit moderately elongated.

Its inclination of 4.55° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 40.7 km/s at perihelion and falls to 18.9 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 = 24.79 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

The current orbit solution is based on 69 observations and has a weighted RMS residual of 0.482 arcseconds.

Condition code U = 8 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.155 AU
Eccentricity
0.3655
Perihelion
0.733 AU
Aphelion
1.577152 AU
Inclination
4.55°
Orbital Period
— yr
Epoch
2452941.5
Mean Anomaly
54.76°

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
2033-Apr-03 07:45 0.143835 AU
21517445 km
21.35 km/s
2034-Oct-26 08:32 0.011778 AU
1762003 km
13.56 km/s
2075-Aug-16 20:54 0.270622 AU
40484545 km
10.51 km/s
2075-Nov-18 18:15 0.356225 AU
53290450 km
7.54 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
24.79

Orbit Quality

RMS
0.48199
Condition
8
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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