SpaceAtlas Space Object Data
NASA JPL SBDB · 2007 AH12

2007 AH12

2007 AH12 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.043 AU once every 2.92 yr.

Amor Observations: 204
Orbital Period · P
2.92 yr
v(q)
34 km/s
v(Q)
12.8 km/s
Diameter · ≈
0.28 km
TJ
3.65
Eccentricity · e
0.4543

Orbit and dynamics

The path is an ellipse reaching 1.115 AU from the Sun at perihelion and 2.971 AU at aphelion, a radial span of 1.856 AU.

Applying Kepler's third law to a = 2.043 AU gives an orbital period of 2.92 yr, or about 1,067 days.

The high eccentricity (0.454) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 10.47° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34 km/s at perihelion and falls to 12.8 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 = 20.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.28 km.

Observation record and orbit quality

The current orbit solution is based on 204 observations and has a weighted RMS residual of 0.4419 arcseconds.

Condition code U = 1 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
2.043 AU
Eccentricity
0.4543
Perihelion
1.115 AU
Aphelion
2.971135 AU
Inclination
10.47°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
227.91°

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
2042-Feb-03 18:09 0.209867 AU
31395662 km
8.30 km/s
2045-Jan-11 00:51 0.399696 AU
59793605 km
13.01 km/s
2077-Feb-09 16:57 0.324896 AU
48603719 km
10.83 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
20.5

Orbit Quality

RMS
0.4419
Condition
1
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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