SpaceAtlas Space Object Data
NASA JPL SBDB · 2008 EU68

2008 EU68

2008 EU68 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.346 AU it takes 1.56 yr to circle the Sun.

Apollo Observations: 87
Orbital Period · P
1.56 yr
v(q)
49.2 km/s
v(Q)
13.4 km/s
Diameter · ≈
0.15 km
TJ
4.7
Eccentricity · e
0.5721

Orbit and dynamics

The path is an ellipse reaching 0.576 AU from the Sun at perihelion and 2.116 AU at aphelion, a radial span of 1.54 AU.

Applying Kepler's third law to a = 1.346 AU gives an orbital period of 1.56 yr, or about 570 days.

The high eccentricity (0.572) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.3° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 49.2 km/s at perihelion and falls to 13.4 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 = 21.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.15 km.

Observation record and orbit quality

The current orbit solution is based on 87 observations and has a weighted RMS residual of 0.5535 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
1.346 AU
Eccentricity
0.5721
Perihelion
0.576 AU
Aphelion
2.116047 AU
Inclination
3.3°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
306.24°

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
2040-Jul-26 07:45 0.099060 AU
14819189 km
15.15 km/s
2047-Feb-09 12:16 0.065040 AU
9729795 km
18.50 km/s
2065-Jul-22 13:14 0.057656 AU
8625250 km
17.43 km/s
2072-Feb-06 06:22 0.068823 AU
10295742 km
16.30 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
21.9

Orbit Quality

RMS
0.55352
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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