SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 US7

2023 US7

2023 US7 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.789 AU once every 2.39 yr.

Amor Observations: 23
Orbital Period · P
2.39 yr
v(q)
31.6 km/s
v(Q)
15.7 km/s
Diameter · ≈
0.1 km
TJ
4
Eccentricity · e
0.3368

Orbit and dynamics

The path is an ellipse reaching 1.186 AU from the Sun at perihelion and 2.392 AU at aphelion, a radial span of 1.206 AU.

Applying Kepler's third law to a = 1.789 AU gives an orbital period of 2.39 yr, or about 874 days.

An eccentricity of 0.337 makes the orbit moderately elongated.

The orbital plane is tilted 7.47° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31.6 km/s at perihelion and falls to 15.7 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 = 22.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.1 km.

Observation record and orbit quality

The current orbit solution is based on 23 observations and has a weighted RMS residual of 0.3785 arcseconds.

Condition code U = 5 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.789 AU
Eccentricity
0.3368
Perihelion
1.186 AU
Aphelion
2.391535 AU
Inclination
7.47°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
19.91°

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
2036-Jan-11 04:53 0.365187 AU
54631230 km
2.39 km/s
2048-Feb-02 17:29 0.491718 AU
73559903 km
4.85 km/s
2054-Oct-04 11:49 0.484446 AU
72472034 km
4.81 km/s
2066-Oct-25 20:50 0.357246 AU
53443296 km
2.99 km/s
2078-Nov-20 00:34 0.250046 AU
37406282 km
1.86 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
22.7

Orbit Quality

RMS
0.37845
Condition
5
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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