SpaceAtlas Space Object Data
NASA JPL SBDB · 2004 SW26

2004 SW26

2004 SW26 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.738 AU and a period of 0.63 yr.

Aten Observations: 25
Orbital Period · P
0.63 yr
v(q)
54 km/s
v(Q)
22.3 km/s
Diameter · ≈
0.03 km
TJ
7.7
Eccentricity · e
0.4162

Orbit and dynamics

Between its closest point (0.431 AU) and its farthest (1.045 AU), the heliocentric distance changes by 0.614 AU over every revolution.

One full revolution takes 0.63 yr (231 days), computed from the semi-major axis of 0.738 AU.

The high eccentricity (0.416) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 18.41° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 54 km/s at perihelion and falls to 22.3 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 = 25.66 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 25 individual observations underpins this orbit; the fit leaves an RMS residual of 0.7876 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
0.7378 AU
Eccentricity
0.4162
Perihelion
0.431 AU
Aphelion
1.044872 AU
Inclination
18.41°
Orbital Period
— yr
Epoch
2453272.5
Mean Anomaly
184.0°

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-Sep-09 21:47 0.160754 AU
24048490 km
19.93 km/s
2035-Sep-09 01:07 0.109466 AU
16375868 km
15.19 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
25.66

Orbit Quality

RMS
0.78756
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.

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