SpaceAtlas Space Object Data
NASA JPL SBDB · 2025 SC29

2025 SC29

2025 SC29 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.973 AU and a period of 0.96 yr.

Aten Observations: 21
Orbital Period · P
0.96 yr
v(q)
39.8 km/s
v(Q)
22.9 km/s
Diameter · ≈
0.02 km
TJ
6.18
Eccentricity · e
0.268

Orbit and dynamics

The path is an ellipse reaching 0.712 AU from the Sun at perihelion and 1.234 AU at aphelion, a radial span of 0.522 AU.

Applying Kepler's third law to a = 0.973 AU gives an orbital period of 0.96 yr, or about 351 days.

An eccentricity of 0.268 makes the orbit moderately elongated.

Its inclination of 3.72° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 39.8 km/s at perihelion and falls to 22.9 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 = 26.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 21 observations and has a weighted RMS residual of 0.3825 arcseconds.

Condition code U = 7 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
0.9733 AU
Eccentricity
0.268
Perihelion
0.712 AU
Aphelion
1.234144 AU
Inclination
3.72°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
161.12°

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
2045-May-31 00:32 0.065104 AU
9739462 km
11.65 km/s
2049-Oct-14 08:32 0.015298 AU
2288583 km
7.43 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
26.5

Orbit Quality

RMS
0.3825
Condition
7
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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