SpaceAtlas Space Object Data
NASA JPL SBDB · 2003 FU3

2003 FU3

2003 FU3 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.858 AU and a period of 0.80 yr.

Aten Observations: 196
Orbital Period · P
0.80 yr
v(q)
48.8 km/s
v(Q)
21.2 km/s
Diameter · ≈
0.22 km
TJ
6.79
Eccentricity · e
0.394

Orbit and dynamics

Between its closest point (0.52 AU) and its farthest (1.197 AU), the heliocentric distance changes by 0.677 AU over every revolution.

One full revolution takes 0.80 yr (290 days), computed from the semi-major axis of 0.858 AU.

An eccentricity of 0.394 makes the orbit moderately elongated.

The orbital plane is tilted 13.04° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 48.8 km/s at perihelion and falls to 21.2 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 = 21.09 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.22 km.

Observation record and orbit quality

Astrometry from 196 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4764 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
0.8584 AU
Eccentricity
0.394
Perihelion
0.52 AU
Aphelion
1.19661 AU
Inclination
13.04°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
264.22°

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
2034-Apr-08 04:14 0.187207 AU
28005792 km
10.17 km/s
2038-Apr-22 17:47 0.125442 AU
18765825 km
10.39 km/s
2042-Apr-30 11:08 0.083491 AU
12490005 km
12.30 km/s
2046-Apr-30 10:53 0.158966 AU
23780991 km
15.77 km/s
2069-Apr-10 00:13 0.180594 AU
27016421 km
10.16 km/s
2073-Apr-24 06:09 0.116104 AU
17368869 km
10.52 km/s
2077-Apr-30 15:54 0.087460 AU
13083842 km
12.67 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
21.09

Orbit Quality

RMS
0.47639
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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