SpaceAtlas Space Object Data
NASA JPL SBDB · 2026 HO3

2026 HO3

2026 HO3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.024 AU it takes 1.04 yr to circle the Sun.

Apollo Observations: 48
Orbital Period · P
1.04 yr
v(q)
37.9 km/s
v(Q)
22.9 km/s
Diameter · ≈
0.08 km
TJ
5.92
Eccentricity · e
0.2464

Orbit and dynamics

Between its closest point (0.771 AU) and its farthest (1.276 AU), the heliocentric distance changes by 0.505 AU over every revolution.

One full revolution takes 1.04 yr (378 days), computed from the semi-major axis of 1.024 AU.

An eccentricity of 0.246 makes the orbit moderately elongated.

The orbital plane is tilted 12.68° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.9 km/s at perihelion and falls to 22.9 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 = 23.28 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.08 km.

Observation record and orbit quality

Astrometry from 48 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5869 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
1.024 AU
Eccentricity
0.2464
Perihelion
0.771 AU
Aphelion
1.276314 AU
Inclination
12.68°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
299.84°

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
2029-Oct-18 04:48 0.197459 AU
29539514 km
9.99 km/s
2055-Apr-26 08:07 0.177332 AU
26528417 km
8.33 km/s
2058-Oct-20 00:01 0.194692 AU
29125490 km
9.93 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
23.28

Orbit Quality

RMS
0.58686
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.

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