SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 BX59

2011 BX59

2011 BX59 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.928 AU once every 5.01 yr.

Amor Observations: 19
Orbital Period · P
5.01 yr
v(q)
37 km/s
v(Q)
8.2 km/s
Diameter · ≈
0.04 km
TJ
2.93
Eccentricity · e
0.637

Orbit and dynamics

Between its closest point (1.063 AU) and its farthest (4.793 AU), the heliocentric distance changes by 3.73 AU over every revolution.

One full revolution takes 5.01 yr (1,830 days), computed from the semi-major axis of 2.928 AU.

The high eccentricity (0.637) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.97° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 37 km/s at perihelion and falls to 8.2 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 24.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 19 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5165 arcseconds.

Condition code U = 5 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
2.928 AU
Eccentricity
0.637
Perihelion
1.063 AU
Aphelion
4.793136 AU
Inclination
3.97°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
19.53°

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
2031-Feb-20 14:45 0.141044 AU
21099886 km
10.54 km/s
2036-Feb-05 05:18 0.210474 AU
31486389 km
15.14 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
24.6

Orbit Quality

RMS
0.5165
Condition
5
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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