SpaceAtlas Space Object Data
NASA JPL SBDB · 386298

386298

386298 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.322 AU once every 1.52 yr.

Amor Observations: 339
Orbital Period · P
1.52 yr
v(q)
31.5 km/s
v(Q)
21.3 km/s
Diameter · ≈
0.34 km
TJ
4.89
Eccentricity · e
0.1925

Orbit and dynamics

The path is an ellipse reaching 1.068 AU from the Sun at perihelion and 1.576 AU at aphelion, a radial span of 0.508 AU.

Applying Kepler's third law to a = 1.322 AU gives an orbital period of 1.52 yr, or about 555 days.

An eccentricity of 0.193 makes the orbit moderately elongated.

The orbital plane is tilted 15.32° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31.5 km/s at perihelion and falls to 21.3 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 = 20.07 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.34 km.

Observation record and orbit quality

The current orbit solution is based on 339 observations and has a weighted RMS residual of 0.528 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
1.322 AU
Eccentricity
0.1925
Perihelion
1.068 AU
Aphelion
1.576485 AU
Inclination
15.32°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
311.07°

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
2049-Aug-03 05:58 0.141175 AU
21119491 km
9.19 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
20.07

Orbit Quality

RMS
0.528
Condition
0
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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