SpaceAtlas Space Object Data
NASA JPL SBDB · 2007 VB138

2007 VB138

2007 VB138 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.772 AU and a period of 0.68 yr.

Aten Observations: 27
Orbital Period · P
0.68 yr
v(q)
53.7 km/s
v(Q)
21.4 km/s
Diameter · ≈
0.02 km
TJ
7.43
Eccentricity · e
0.4308

Orbit and dynamics

The path is an ellipse reaching 0.44 AU from the Sun at perihelion and 1.105 AU at aphelion, a radial span of 0.665 AU.

Applying Kepler's third law to a = 0.772 AU gives an orbital period of 0.68 yr, or about 248 days.

The high eccentricity (0.431) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 6.01° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 53.7 km/s at perihelion and falls to 21.4 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 = 26.1 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 27 observations and has a weighted RMS residual of 0.8158 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
0.7725 AU
Eccentricity
0.4308
Perihelion
0.44 AU
Aphelion
1.105293 AU
Inclination
6.01°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
359.1°

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
2030-Sep-17 07:13 0.077871 AU
11649277 km
14.06 km/s
2032-Sep-22 13:12 0.142859 AU
21371447 km
21.04 km/s
2039-Nov-09 03:21 0.201393 AU
30127924 km
24.49 km/s
2041-Nov-16 14:01 0.020331 AU
3041547 km
17.26 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
26.1

Orbit Quality

RMS
0.81576
Condition
7
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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