SpaceAtlas Space Object Data
NASA JPL SBDB · 2025 CS2

2025 CS2

2025 CS2 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.947 AU and a period of 0.92 yr.

Aten Observations: 53
Orbital Period · P
0.92 yr
v(q)
47.6 km/s
v(Q)
19.7 km/s
Diameter · ≈
0.07 km
TJ
6.27
Eccentricity · e
0.4154

Orbit and dynamics

Between its closest point (0.554 AU) and its farthest (1.341 AU), the heliocentric distance changes by 0.787 AU over every revolution.

One full revolution takes 0.92 yr (337 days), computed from the semi-major axis of 0.947 AU.

The high eccentricity (0.415) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.85° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 47.6 km/s at perihelion and falls to 19.7 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 = 23.54 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

Astrometry from 53 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5982 arcseconds.

Condition code U = 0 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

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
0.9471 AU
Eccentricity
0.4154
Perihelion
0.554 AU
Aphelion
1.340525 AU
Inclination
3.85°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
257.96°

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
2039-May-21 20:38 0.086303 AU
12910759 km
10.28 km/s
2048-Jan-24 03:32 0.079533 AU
11897952 km
14.02 km/s
2051-May-20 00:05 0.064048 AU
9581470 km
14.48 km/s
2060-Jan-24 03:55 0.143739 AU
21503016 km
8.99 km/s
2071-Jan-27 19:56 0.165373 AU
24739388 km
17.26 km/s
2074-May-21 20:51 0.028422 AU
4251799 km
11.95 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
23.54

Orbit Quality

RMS
0.59825
Condition
0
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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