SpaceAtlas Space Object Data
NASA JPL SBDB · 2007 US12

2007 US12

2007 US12 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.906 AU and a period of 0.86 yr.

Aten Observations: 98
Orbital Period · P
0.86 yr
v(q)
55.3 km/s
v(Q)
17.7 km/s
Diameter · ≈
0.13 km
TJ
6.45
Eccentricity · e
0.5147

Orbit and dynamics

Between its closest point (0.44 AU) and its farthest (1.373 AU), the heliocentric distance changes by 0.933 AU over every revolution.

One full revolution takes 0.86 yr (315 days), computed from the semi-major axis of 0.906 AU.

The high eccentricity (0.515) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 8.8° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 55.3 km/s at perihelion and falls to 17.7 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 = 22.13 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.13 km.

Observation record and orbit quality

Astrometry from 98 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6458 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
0.9062 AU
Eccentricity
0.5147
Perihelion
0.44 AU
Aphelion
1.372621 AU
Inclination
8.8°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
295.03°

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
2032-Oct-19 20:01 0.022037 AU
3296757 km
16.85 km/s
2041-Jan-29 16:43 0.193467 AU
28942252 km
12.46 km/s
2051-Oct-19 17:11 0.042085 AU
6295861 km
15.19 km/s
2057-Oct-25 06:22 0.182477 AU
27298206 km
21.90 km/s
2060-Jan-30 01:06 0.151742 AU
22700264 km
15.28 km/s
2070-Oct-21 04:26 0.154981 AU
23184869 km
12.46 km/s
2076-Oct-21 13:49 0.077571 AU
11604435 km
18.62 km/s
2079-Jan-27 02:55 0.167276 AU
25024091 km
18.34 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
22.13

Orbit Quality

RMS
0.64579
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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