SpaceAtlas Space Object Data
NASA JPL SBDB · 2005 US64

2005 US64

2005 US64 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.141 AU it takes 1.22 yr to circle the Sun.

Apollo Observations: 78
Orbital Period · P
1.22 yr
v(q)
32.3 km/s
v(Q)
24.1 km/s
Diameter · ≈
0.09 km
TJ
5.3
Eccentricity · e
0.1447

Orbit and dynamics

The path is an ellipse reaching 0.976 AU from the Sun at perihelion and 1.306 AU at aphelion, a radial span of 0.33 AU.

Applying Kepler's third law to a = 1.141 AU gives an orbital period of 1.22 yr, or about 445 days.

An eccentricity of 0.145 makes the orbit moderately elongated.

A steep inclination of 37.15° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 32.3 km/s at perihelion and falls to 24.1 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 = 23 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

The current orbit solution is based on 78 observations and has a weighted RMS residual of 0.4876 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
1.141 AU
Eccentricity
0.1447
Perihelion
0.976 AU
Aphelion
1.306103 AU
Inclination
37.15°
Orbital Period
— yr
Epoch
2453675.5
Mean Anomaly
39.32°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
23.0

Orbit Quality

RMS
0.48763
Condition
8
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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