SpaceAtlas Space Object Data
NASA JPL SBDB · 2003 UP24

2003 UP24

2003 UP24 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.236 AU once every 3.34 yr.

Amor Observations: 139
Orbital Period · P
3.34 yr
v(q)
34.4 km/s
v(Q)
11.5 km/s
Diameter · ≈
0.32 km
TJ
3.38
Eccentricity · e
0.4981

Orbit and dynamics

The path is an ellipse reaching 1.122 AU from the Sun at perihelion and 3.35 AU at aphelion, a radial span of 2.228 AU.

Applying Kepler's third law to a = 2.236 AU gives an orbital period of 3.34 yr, or about 1,221 days.

The high eccentricity (0.498) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 21.65° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 34.4 km/s at perihelion and falls to 11.5 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 20.23 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.32 km.

Observation record and orbit quality

The current orbit solution is based on 139 observations and has a weighted RMS residual of 0.6069 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
2.236 AU
Eccentricity
0.4981
Perihelion
1.122 AU
Aphelion
3.349752 AU
Inclination
21.65°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
254.48°

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
2070-Nov-06 17:17 0.487524 AU
72932589 km
19.97 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
20.23

Orbit Quality

RMS
0.60692
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.

Keep exploring

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