SpaceAtlas Space Object Data
NASA JPL SBDB · 2025 RB3

2025 RB3

2025 RB3 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.935 AU and a period of 0.90 yr.

Aten Observations: 16
Orbital Period · P
0.90 yr
v(q)
36 km/s
v(Q)
26.4 km/s
Diameter · ≈
0.03 km
TJ
6.4
Eccentricity · e
0.1536

Orbit and dynamics

The path is an ellipse reaching 0.791 AU from the Sun at perihelion and 1.079 AU at aphelion, a radial span of 0.288 AU.

Applying Kepler's third law to a = 0.935 AU gives an orbital period of 0.90 yr, or about 330 days.

An eccentricity of 0.154 makes the orbit moderately elongated.

The orbital plane is tilted 5.49° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36 km/s at perihelion and falls to 26.4 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 = 25.21 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

The current orbit solution is based on 16 observations and has a weighted RMS residual of 0.2967 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
0.9351 AU
Eccentricity
0.1536
Perihelion
0.791 AU
Aphelion
1.078731 AU
Inclination
5.49°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
76.13°

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
2035-Dec-20 02:46 0.089457 AU
13382563 km
6.63 km/s
2045-Feb-08 18:44 0.142763 AU
21357108 km
4.95 km/s
2053-Aug-19 00:49 0.041568 AU
6218521 km
7.03 km/s
2063-Jun-03 23:25 0.198030 AU
29624876 km
4.77 km/s
2064-Jan-09 07:07 0.096351 AU
14413918 km
3.91 km/s
2072-Aug-18 01:58 0.008380 AU
1253624 km
5.93 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
25.21

Orbit Quality

RMS
0.29667
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

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