SpaceAtlas Space Object Data
NASA JPL SBDB · 2025 SW6

2025 SW6

2025 SW6 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.05 AU it takes 1.08 yr to circle the Sun.

Apollo Observations: 20
Orbital Period · P
1.08 yr
v(q)
35.6 km/s
v(Q)
23.7 km/s
Diameter · ≈
0.01 km
TJ
5.84
Eccentricity · e
0.1998

Orbit and dynamics

The path is an ellipse reaching 0.84 AU from the Sun at perihelion and 1.26 AU at aphelion, a radial span of 0.42 AU.

Applying Kepler's third law to a = 1.05 AU gives an orbital period of 1.08 yr, or about 393 days.

An eccentricity of 0.2 makes the orbit moderately elongated.

Its inclination of 2.43° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.6 km/s at perihelion and falls to 23.7 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 = 28.62 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 20 observations and has a weighted RMS residual of 0.7055 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
1.05 AU
Eccentricity
0.1998
Perihelion
0.84 AU
Aphelion
1.25979 AU
Inclination
2.43°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
167.51°

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-Mar-09 06:43 0.072948 AU
10912911 km
3.55 km/s
2039-Sep-19 15:26 0.118149 AU
17674805 km
9.77 km/s
2041-Jan-05 17:19 0.142268 AU
21282981 km
5.20 km/s
2041-May-06 01:39 0.180228 AU
26961716 km
4.44 km/s
2056-Mar-22 18:13 0.032709 AU
4893189 km
7.33 km/s
2070-Mar-23 08:16 0.003744 AU
560115 km
7.50 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
28.62

Orbit Quality

RMS
0.70546
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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