SpaceAtlas Space Object Data
NASA JPL SBDB · 2025 HO2

2025 HO2

2025 HO2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.341 AU it takes 1.55 yr to circle the Sun.

Apollo Observations: 56
Orbital Period · P
1.55 yr
v(q)
33.1 km/s
v(Q)
20 km/s
Diameter · ≈
0.05 km
TJ
4.84
Eccentricity · e
0.2478

Orbit and dynamics

Between its closest point (1.009 AU) and its farthest (1.673 AU), the heliocentric distance changes by 0.664 AU over every revolution.

One full revolution takes 1.55 yr (567 days), computed from the semi-major axis of 1.341 AU.

An eccentricity of 0.248 makes the orbit moderately elongated.

The orbital plane is tilted 12.6° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.1 km/s at perihelion and falls to 20 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 24.28 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

Astrometry from 56 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3977 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
1.341 AU
Eccentricity
0.2478
Perihelion
1.009 AU
Aphelion
1.6733 AU
Inclination
12.6°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
256.09°

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-Apr-10 23:19 0.082077 AU
12278490 km
9.88 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
24.28

Orbit Quality

RMS
0.39768
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

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