SpaceAtlas Space Object Data
NASA JPL SBDB · 2025 CD

2025 CD

2025 CD is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.993 AU and a period of 0.99 yr.

Aten Observations: 34
Orbital Period · P
0.99 yr
v(q)
42.7 km/s
v(Q)
20.9 km/s
Diameter · ≈
0.01 km
TJ
6.03
Eccentricity · e
0.3414

Orbit and dynamics

The path is an ellipse reaching 0.654 AU from the Sun at perihelion and 1.332 AU at aphelion, a radial span of 0.678 AU.

Applying Kepler's third law to a = 0.993 AU gives an orbital period of 0.99 yr, or about 362 days.

An eccentricity of 0.341 makes the orbit moderately elongated.

The orbital plane is tilted 16.53° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 42.7 km/s at perihelion and falls to 20.9 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 = 28.45 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 34 observations and has a weighted RMS residual of 0.4313 arcseconds.

Condition code U = 6 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
0.9933 AU
Eccentricity
0.3414
Perihelion
0.654 AU
Aphelion
1.332413 AU
Inclination
16.53°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
58.1°

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
2027-Jan-31 13:39 0.113389 AU
16962799 km
16.67 km/s
2028-Jan-29 12:05 0.173611 AU
25971815 km
18.39 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
28.45

Orbit Quality

RMS
0.43125
Condition
6
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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