SpaceAtlas Space Object Data
NASA JPL SBDB · 2026 SW11

2026 SW11

2026 SW11 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.574 AU it takes 1.97 yr to circle the Sun.

Apollo Observations: 20
Orbital Period · P
1.97 yr
v(q)
34.6 km/s
v(Q)
16.3 km/s
Diameter · ≈
0.01 km
TJ
4.32
Eccentricity · e
0.3593

Orbit and dynamics

Between its closest point (1.008 AU) and its farthest (2.14 AU), the heliocentric distance changes by 1.132 AU over every revolution.

One full revolution takes 1.97 yr (721 days), computed from the semi-major axis of 1.574 AU.

An eccentricity of 0.359 makes the orbit moderately elongated.

The orbital plane is tilted 9.64° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.6 km/s at perihelion and falls to 16.3 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 27.88 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 20 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3659 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
1.574 AU
Eccentricity
0.3593
Perihelion
1.008 AU
Aphelion
2.139538 AU
Inclination
9.64°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
305.74°

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-Aug-19 05:03 0.173825 AU
26003922 km
11.04 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
27.88

Orbit Quality

RMS
0.36585
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.