SpaceAtlas Space Object Data
NASA JPL SBDB · 509569

509569

509569 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.406 AU once every 1.67 yr.

Amor Observations: 161
Orbital Period · P
1.67 yr
v(q)
29.3 km/s
v(Q)
21.6 km/s
Diameter · ≈
0.2 km
TJ
4.68
Eccentricity · e
0.152

Orbit and dynamics

The path is an ellipse reaching 1.192 AU from the Sun at perihelion and 1.62 AU at aphelion, a radial span of 0.428 AU.

Applying Kepler's third law to a = 1.406 AU gives an orbital period of 1.67 yr, or about 609 days.

An eccentricity of 0.152 makes the orbit moderately elongated.

The orbital plane is tilted 17.34° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 29.3 km/s at perihelion and falls to 21.6 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 = 21.26 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.2 km.

Observation record and orbit quality

The current orbit solution is based on 161 observations and has a weighted RMS residual of 0.5801 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
1.406 AU
Eccentricity
0.152
Perihelion
1.192 AU
Aphelion
1.619712 AU
Inclination
17.34°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
299.52°

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
21.26

Orbit Quality

RMS
0.58012
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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