SpaceAtlas Space Object Data
NASA JPL SBDB · 2026 DO

2026 DO

2026 DO is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.87 AU and a period of 0.81 yr.

Aten Observations: 90
Orbital Period · P
0.81 yr
v(q)
37.7 km/s
v(Q)
27.1 km/s
Diameter · ≈
0.01 km
TJ
6.78
Eccentricity · e
0.1642

Orbit and dynamics

Between its closest point (0.728 AU) and its farthest (1.013 AU), the heliocentric distance changes by 0.285 AU over every revolution.

One full revolution takes 0.81 yr (297 days), computed from the semi-major axis of 0.87 AU.

An eccentricity of 0.164 makes the orbit moderately elongated.

The orbital plane is tilted 9.26° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.7 km/s at perihelion and falls to 27.1 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 = 27.66 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 90 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5349 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
0.8704 AU
Eccentricity
0.1642
Perihelion
0.728 AU
Aphelion
1.01332 AU
Inclination
9.26°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
284.92°

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-Feb-18 16:26 0.015073 AU
2254948 km
5.53 km/s
2056-Feb-11 04:50 0.042201 AU
6313112 km
6.37 km/s
2069-Feb-15 05:11 0.011077 AU
1657080 km
5.71 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
27.66

Orbit Quality

RMS
0.53488
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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