SpaceAtlas Space Object Data
NASA JPL SBDB · 258325

258325

258325 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.719 AU once every 2.25 yr.

Amor Observations: 299
Orbital Period · P
2.25 yr
v(q)
34.5 km/s
v(Q)
15 km/s
Diameter · ≈
0.57 km
TJ
4.07
Eccentricity · e
0.3955

Orbit and dynamics

The path is an ellipse reaching 1.039 AU from the Sun at perihelion and 2.399 AU at aphelion, a radial span of 1.36 AU.

Applying Kepler's third law to a = 1.719 AU gives an orbital period of 2.25 yr, or about 823 days.

An eccentricity of 0.396 makes the orbit moderately elongated.

The orbital plane is tilted 7.94° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.5 km/s at perihelion and falls to 15 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 18.99 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.57 km.

Observation record and orbit quality

The current orbit solution is based on 299 observations and has a weighted RMS residual of 0.523 arcseconds.

Condition code U = 0 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
1.719 AU
Eccentricity
0.3955
Perihelion
1.039 AU
Aphelion
2.398865 AU
Inclination
7.94°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
337.3°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
18.99

Orbit Quality

RMS
0.52295
Condition
0
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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