SpaceAtlas Space Object Data
NASA JPL SBDB · 429389

429389

429389 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.198 AU it takes 1.31 yr to circle the Sun.

Apollo Observations: 201
Orbital Period · P
1.31 yr
v(q)
32.5 km/s
v(Q)
22.8 km/s
Diameter · ≈
0.17 km
TJ
5.28
Eccentricity · e
0.1759

Orbit and dynamics

Between its closest point (0.987 AU) and its farthest (1.409 AU), the heliocentric distance changes by 0.422 AU over every revolution.

One full revolution takes 1.31 yr (479 days), computed from the semi-major axis of 1.198 AU.

An eccentricity of 0.176 makes the orbit moderately elongated.

The orbital plane is tilted 9.16° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.5 km/s at perihelion and falls to 22.8 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 = 21.66 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.17 km.

Observation record and orbit quality

Astrometry from 201 individual observations underpins this orbit; the fit leaves an RMS residual of 0.481 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
1.198 AU
Eccentricity
0.1759
Perihelion
0.987 AU
Aphelion
1.408728 AU
Inclination
9.16°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
320.74°

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
21.66

Orbit Quality

RMS
0.48099
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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