SpaceAtlas Space Object Data
NASA JPL SBDB · 2008 EO

2008 EO

2008 EO belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.188 AU it takes 1.29 yr to circle the Sun.

Apollo Observations: 18
Orbital Period · P
1.29 yr
v(q)
45.4 km/s
v(Q)
16.4 km/s
Diameter · ≈
0.05 km
TJ
5.19
Eccentricity · e
0.469

Orbit and dynamics

Between its closest point (0.631 AU) and its farthest (1.745 AU), the heliocentric distance changes by 1.114 AU over every revolution.

One full revolution takes 1.29 yr (473 days), computed from the semi-major axis of 1.188 AU.

The high eccentricity (0.469) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 16.18° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 45.4 km/s at perihelion and falls to 16.4 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 = 24.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

Astrometry from 18 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6168 arcseconds.

Condition code U = 8 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
1.188 AU
Eccentricity
0.469
Perihelion
0.631 AU
Aphelion
1.745172 AU
Inclination
16.18°
Orbital Period
— yr
Epoch
2454528.5
Mean Anomaly
53.96°

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
2074-Feb-16 18:05 0.171677 AU
25682581 km
10.55 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
24.2

Orbit Quality

RMS
0.61682
Condition
8
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.

Keep exploring

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