SpaceAtlas Space Object Data
NASA JPL SBDB · 2026 CS3

2026 CS3

2026 CS3 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.753 AU and a period of 0.65 yr.

Aten Observations: 18
Orbital Period · P
0.65 yr
v(q)
50 km/s
v(Q)
23.5 km/s
Diameter · ≈
0.01 km
TJ
7.61
Eccentricity · e
0.3602

Orbit and dynamics

Between its closest point (0.482 AU) and its farthest (1.024 AU), the heliocentric distance changes by 0.542 AU over every revolution.

One full revolution takes 0.65 yr (239 days), computed from the semi-major axis of 0.753 AU.

An eccentricity of 0.36 makes the orbit moderately elongated.

The orbital plane is tilted 8.91° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 50 km/s at perihelion and falls to 23.5 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 = 26.92 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 18 individual observations underpins this orbit; the fit leaves an RMS residual of 0.549 arcseconds.

Condition code U = 8 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
0.753 AU
Eccentricity
0.3602
Perihelion
0.482 AU
Aphelion
1.024231 AU
Inclination
8.91°
Orbital Period
— yr
Epoch
2461086.5
Mean Anomaly
198.82°

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
2028-Feb-28 19:31 0.142607 AU
21333636 km
13.38 km/s
2045-Feb-27 17:31 0.050912 AU
7616385 km
14.35 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
26.92

Orbit Quality

RMS
0.54896
Condition
8
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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