SpaceAtlas Space Object Data
NASA JPL SBDB · 2025 UB8

2025 UB8

2025 UB8 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.193 AU it takes 1.30 yr to circle the Sun.

Apollo Observations: 57
Orbital Period · P
1.30 yr
v(q)
40.6 km/s
v(Q)
18.3 km/s
Diameter · ≈
0.04 km
TJ
5.16
Eccentricity · e
0.3771

Orbit and dynamics

Between its closest point (0.743 AU) and its farthest (1.643 AU), the heliocentric distance changes by 0.9 AU over every revolution.

One full revolution takes 1.30 yr (476 days), computed from the semi-major axis of 1.193 AU.

An eccentricity of 0.377 makes the orbit moderately elongated.

A steep inclination of 25.21° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 40.6 km/s at perihelion and falls to 18.3 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 = 24.99 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 57 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6635 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
1.193 AU
Eccentricity
0.3771
Perihelion
0.743 AU
Aphelion
1.64288 AU
Inclination
25.21°
Orbital Period
— yr
Epoch
2460976.5
Mean Anomaly
306.82°

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
2068-Nov-02 14:36 0.051739 AU
7740040 km
15.58 km/s
2078-Apr-23 11:53 0.033986 AU
5084205 km
15.89 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
24.99

Orbit Quality

RMS
0.66351
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.

Keep exploring

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