SpaceAtlas Space Object Data
NASA JPL SBDB · 2007 UN12

2007 UN12

2007 UN12 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.049 AU it takes 1.07 yr to circle the Sun.

Apollo Observations: 132
Orbital Period · P
1.07 yr
v(q)
30.8 km/s
v(Q)
27.4 km/s
Diameter · ≈
0.01 km
TJ
5.86
Eccentricity · e
0.0586

Orbit and dynamics

The path is an ellipse reaching 0.988 AU from the Sun at perihelion and 1.11 AU at aphelion, a radial span of 0.122 AU.

Applying Kepler's third law to a = 1.049 AU gives an orbital period of 1.07 yr, or about 392 days.

With e = 0.059, the orbit is close to circular.

Its inclination of 0.23° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 30.8 km/s at perihelion and falls to 27.4 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 = 28.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 132 observations and has a weighted RMS residual of 0.5916 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
1.049 AU
Eccentricity
0.0586
Perihelion
0.988 AU
Aphelion
1.110471 AU
Inclination
0.23°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
124.37°

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
2034-Jun-24 08:39 0.191834 AU
28697993 km
7.22 km/s
2035-Mar-02 19:38 0.117939 AU
17643365 km
2.59 km/s
2035-Nov-05 11:13 0.189406 AU
28334671 km
7.28 km/s
2048-Jun-16 21:42 0.339076 AU
50725006 km
11.52 km/s
2049-Apr-24 03:14 0.095166 AU
14236639 km
1.91 km/s
2049-Oct-26 14:27 0.042372 AU
6338734 km
2.89 km/s
2061-Jun-15 00:34 0.457987 AU
68513911 km
15.03 km/s
2062-Sep-13 22:05 0.016160 AU
2417492 km
1.37 km/s
2063-Nov-06 04:46 0.453358 AU
67821319 km
15.14 km/s
2075-Jun-04 16:31 0.420921 AU
62968921 km
14.40 km/s
2077-Oct-26 03:49 0.419357 AU
62734856 km
14.84 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
28.7

Orbit Quality

RMS
0.59163
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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