SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 EO11

2011 EO11

2011 EO11 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.098 AU it takes 1.15 yr to circle the Sun.

Apollo Observations: 25
Orbital Period · P
1.15 yr
v(q)
39.7 km/s
v(Q)
20.3 km/s
Diameter · ≈
0.01 km
TJ
5.6
Eccentricity · e
0.3228

Orbit and dynamics

Between its closest point (0.743 AU) and its farthest (1.452 AU), the heliocentric distance changes by 0.709 AU over every revolution.

One full revolution takes 1.15 yr (420 days), computed from the semi-major axis of 1.098 AU.

An eccentricity of 0.323 makes the orbit moderately elongated.

The orbital plane is tilted 10.03° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 39.7 km/s at perihelion and falls to 20.3 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 = 27.4 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 25 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3808 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
1.098 AU
Eccentricity
0.3228
Perihelion
0.743 AU
Aphelion
1.452434 AU
Inclination
10.03°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
40.42°

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-Mar-08 07:12 0.002393 AU
357966 km
10.39 km/s
2035-Sep-10 02:56 0.016727 AU
2502358 km
10.08 km/s
2066-Oct-03 08:50 0.358770 AU
53671221 km
23.82 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
27.4

Orbit Quality

RMS
0.38078
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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