SpaceAtlas Space Object Data
NASA JPL SBDB · 418135

418135

418135 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.459 AU it takes 1.76 yr to circle the Sun.

Apollo Observations: 197
Orbital Period · P
1.76 yr
v(q)
35 km/s
v(Q)
17.4 km/s
Diameter · ≈
0.47 km
TJ
4.53
Eccentricity · e
0.3366

Orbit and dynamics

The path is an ellipse reaching 0.968 AU from the Sun at perihelion and 1.95 AU at aphelion, a radial span of 0.982 AU.

Applying Kepler's third law to a = 1.459 AU gives an orbital period of 1.76 yr, or about 644 days.

An eccentricity of 0.337 makes the orbit moderately elongated.

The orbital plane is tilted 16.01° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35 km/s at perihelion and falls to 17.4 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 = 19.37 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.47 km.

Observation record and orbit quality

The current orbit solution is based on 197 observations and has a weighted RMS residual of 0.3882 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
1.459 AU
Eccentricity
0.3366
Perihelion
0.968 AU
Aphelion
1.950099 AU
Inclination
16.01°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
132.24°

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
19.37

Orbit Quality

RMS
0.3882
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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