SpaceAtlas Space Object Data
NASA JPL SBDB · 2024 CM9

2024 CM9

2024 CM9 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.736 AU it takes 2.29 yr to circle the Sun.

Apollo Observations: 26
Orbital Period · P
2.29 yr
v(q)
39.4 km/s
v(Q)
13 km/s
Diameter · ≈
0.19 km
TJ
3.97
Eccentricity · e
0.5047

Orbit and dynamics

The path is an ellipse reaching 0.86 AU from the Sun at perihelion and 2.612 AU at aphelion, a radial span of 1.752 AU.

Applying Kepler's third law to a = 1.736 AU gives an orbital period of 2.29 yr, or about 835 days.

The high eccentricity (0.505) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 13.2° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 39.4 km/s at perihelion and falls to 13 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 = 21.33 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.19 km.

Observation record and orbit quality

The current orbit solution is based on 26 observations and has a weighted RMS residual of 0.3511 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
1.736 AU
Eccentricity
0.5047
Perihelion
0.86 AU
Aphelion
2.612159 AU
Inclination
13.2°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
320.05°

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
2040-Jun-11 02:15 0.147994 AU
22139617 km
12.62 km/s
2056-Jun-16 18:19 0.147202 AU
22021122 km
12.62 km/s
2072-Jun-20 11:10 0.149481 AU
22362070 km
12.70 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
21.33

Orbit Quality

RMS
0.35112
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.

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