SpaceAtlas Space Object Data
NASA JPL SBDB · 2007 US3

2007 US3

2007 US3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.521 AU it takes 1.88 yr to circle the Sun.

Apollo Observations: 82
Orbital Period · P
1.88 yr
v(q)
35.5 km/s
v(Q)
16.4 km/s
Diameter · ≈
0.12 km
TJ
4.34
Eccentricity · e
0.3668

Orbit and dynamics

The path is an ellipse reaching 0.963 AU from the Sun at perihelion and 2.079 AU at aphelion, a radial span of 1.116 AU.

Applying Kepler's third law to a = 1.521 AU gives an orbital period of 1.88 yr, or about 685 days.

An eccentricity of 0.367 makes the orbit moderately elongated.

A steep inclination of 24.5° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 35.5 km/s at perihelion and falls to 16.4 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 = 22.37 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.12 km.

Observation record and orbit quality

The current orbit solution is based on 82 observations and has a weighted RMS residual of 0.5377 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
1.521 AU
Eccentricity
0.3668
Perihelion
0.963 AU
Aphelion
2.078903 AU
Inclination
24.5°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
11.83°

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
2037-May-10 04:29 0.409183 AU
61212894 km
12.72 km/s
2037-Oct-11 22:02 0.152976 AU
22884938 km
15.92 km/s
2052-May-07 11:02 0.445180 AU
66597935 km
12.71 km/s
2052-Oct-13 09:30 0.180295 AU
26971790 km
17.11 km/s
2054-May-13 02:51 0.484394 AU
72464349 km
21.82 km/s
2067-May-04 17:20 0.495137 AU
74071380 km
12.80 km/s
2067-Oct-16 17:58 0.242839 AU
36328125 km
18.92 km/s
2069-May-15 06:05 0.420605 AU
62921577 km
19.74 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
22.37

Orbit Quality

RMS
0.53775
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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