SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 BE38

2011 BE38

2011 BE38 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.635 AU it takes 4.28 yr to circle the Sun.

Apollo Observations: 158
Orbital Period · P
4.28 yr
v(q)
44.5 km/s
v(Q)
7.6 km/s
Diameter · ≈
0.76 km
TJ
2.97
Eccentricity · e
0.7089

Orbit and dynamics

The path is an ellipse reaching 0.767 AU from the Sun at perihelion and 4.503 AU at aphelion, a radial span of 3.736 AU.

Applying Kepler's third law to a = 2.635 AU gives an orbital period of 4.28 yr, or about 1,562 days.

The high eccentricity (0.709) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 8.17° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 44.5 km/s at perihelion and falls to 7.6 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 = 18.35 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.76 km.

Observation record and orbit quality

The current orbit solution is based on 158 observations and has a weighted RMS residual of 0.3815 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
2.635 AU
Eccentricity
0.7089
Perihelion
0.767 AU
Aphelion
4.502951 AU
Inclination
8.17°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
190.77°

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
2028-Jun-09 14:08 0.267758 AU
40056075 km
15.23 km/s
2045-Sep-08 08:11 0.281793 AU
42155561 km
26.13 km/s
2058-Apr-03 23:07 0.135592 AU
20284247 km
19.74 km/s
2079-Sep-06 00:12 0.211626 AU
31658770 km
24.25 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
18.35

Orbit Quality

RMS
0.38154
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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