SpaceAtlas Space Object Data
NASA JPL SBDB · 2025 MB90

2025 MB90

2025 MB90 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.992 AU and a period of 0.99 yr.

Aten Observations: 89
Orbital Period · P
0.99 yr
v(q)
36.2 km/s
v(Q)
24.7 km/s
Diameter · ≈
0.05 km
TJ
6.07
Eccentricity · e
0.1884

Orbit and dynamics

The path is an ellipse reaching 0.805 AU from the Sun at perihelion and 1.179 AU at aphelion, a radial span of 0.374 AU.

Applying Kepler's third law to a = 0.992 AU gives an orbital period of 0.99 yr, or about 361 days.

An eccentricity of 0.188 makes the orbit moderately elongated.

The orbital plane is tilted 15.58° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.2 km/s at perihelion and falls to 24.7 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 = 24.11 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

The current orbit solution is based on 89 observations and has a weighted RMS residual of 0.5127 arcseconds.

Condition code U = 1 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

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
0.9924 AU
Eccentricity
0.1884
Perihelion
0.805 AU
Aphelion
1.179368 AU
Inclination
15.58°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
230.72°

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
2027-Jul-17 06:39 0.089701 AU
13419005 km
11.16 km/s
2028-Jul-13 17:18 0.176280 AU
26371141 km
13.15 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
24.11

Orbit Quality

RMS
0.51274
Condition
1
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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