SpaceAtlas Space Object Data
NASA JPL SBDB · 455146

455146

455146 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.227 AU once every 3.32 yr.

Amor Observations: 102
Orbital Period · P
3.32 yr
v(q)
31.4 km/s
v(Q)
12.7 km/s
Diameter · ≈
0.42 km
TJ
3.5
Eccentricity · e
0.4244

Orbit and dynamics

The path is an ellipse reaching 1.282 AU from the Sun at perihelion and 3.172 AU at aphelion, a radial span of 1.89 AU.

Applying Kepler's third law to a = 2.227 AU gives an orbital period of 3.32 yr, or about 1,214 days.

The high eccentricity (0.424) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 10.11° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31.4 km/s at perihelion and falls to 12.7 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 = 19.65 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.42 km.

Observation record and orbit quality

The current orbit solution is based on 102 observations and has a weighted RMS residual of 0.6857 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
2.227 AU
Eccentricity
0.4244
Perihelion
1.282 AU
Aphelion
3.172139 AU
Inclination
10.11°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
354.09°

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

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
19.65

Orbit Quality

RMS
0.68572
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.

Keep exploring

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