SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 EE41

2011 EE41

2011 EE41 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.927 AU and a period of 0.89 yr.

Aten Observations: 21
Orbital Period · P
0.89 yr
v(q)
37 km/s
v(Q)
25.8 km/s
Diameter · ≈
0.05 km
TJ
6.43
Eccentricity · e
0.1779

Orbit and dynamics

The path is an ellipse reaching 0.762 AU from the Sun at perihelion and 1.092 AU at aphelion, a radial span of 0.33 AU.

Applying Kepler's third law to a = 0.927 AU gives an orbital period of 0.89 yr, or about 326 days.

An eccentricity of 0.178 makes the orbit moderately elongated.

The orbital plane is tilted 10.36° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37 km/s at perihelion and falls to 25.8 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 = 24.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

The current orbit solution is based on 21 observations and has a weighted RMS residual of 0.3837 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
0.927 AU
Eccentricity
0.1779
Perihelion
0.762 AU
Aphelion
1.091913 AU
Inclination
10.36°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
196.84°

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
2027-Jan-26 14:51 0.293763 AU
43946258 km
14.72 km/s
2028-Apr-13 19:34 0.085505 AU
12791419 km
6.88 km/s
2037-Apr-20 12:16 0.367740 AU
55013084 km
18.49 km/s
2045-Apr-25 19:59 0.106874 AU
15988062 km
11.80 km/s
2052-Jan-26 17:15 0.161979 AU
24231702 km
14.52 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
24.3

Orbit Quality

RMS
0.38375
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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