SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 MX

2011 MX

2011 MX belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.431 AU it takes 1.71 yr to circle the Sun.

Apollo Observations: 23
Orbital Period · P
1.71 yr
v(q)
37.9 km/s
v(Q)
16.3 km/s
Diameter · ≈
0.01 km
TJ
4.57
Eccentricity · e
0.3977

Orbit and dynamics

The path is an ellipse reaching 0.862 AU from the Sun at perihelion and 2 AU at aphelion, a radial span of 1.138 AU.

Applying Kepler's third law to a = 1.431 AU gives an orbital period of 1.71 yr, or about 625 days.

An eccentricity of 0.398 makes the orbit moderately elongated.

The orbital plane is tilted 13.46° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.9 km/s at perihelion and falls to 16.3 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 = 26.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 23 observations and has a weighted RMS residual of 0.7174 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
1.431 AU
Eccentricity
0.3977
Perihelion
0.862 AU
Aphelion
2.000109 AU
Inclination
13.46°
Orbital Period
— yr
Epoch
2455737.5
Mean Anomaly
30.57°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
26.9

Orbit Quality

RMS
0.71741
Condition
8
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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