SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 CW46

2011 CW46

2011 CW46 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.049 AU it takes 1.07 yr to circle the Sun.

Apollo Observations: 11
Orbital Period · P
1.07 yr
v(q)
34 km/s
v(Q)
24.8 km/s
Diameter · ≈
0.04 km
TJ
5.73
Eccentricity · e
0.1562

Orbit and dynamics

Between its closest point (0.885 AU) and its farthest (1.213 AU), the heliocentric distance changes by 0.328 AU over every revolution.

One full revolution takes 1.07 yr (392 days), computed from the semi-major axis of 1.049 AU.

An eccentricity of 0.156 makes the orbit moderately elongated.

A steep inclination of 30.36° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 34 km/s at perihelion and falls to 24.8 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 = 24.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 11 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4075 arcseconds.

Condition code U = 9 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
1.049 AU
Eccentricity
0.1562
Perihelion
0.885 AU
Aphelion
1.212854 AU
Inclination
30.36°
Orbital Period
— yr
Epoch
2455604.5
Mean Anomaly
84.59°

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
24.8

Orbit Quality

RMS
0.40753
Condition
9
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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