SpaceAtlas Space Object Data
NASA JPL SBDB · 518810

518810

518810 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.193 AU it takes 1.30 yr to circle the Sun.

Apollo Observations: 186
Orbital Period · P
1.30 yr
v(q)
36 km/s
v(Q)
20.7 km/s
Diameter · ≈
0.15 km
TJ
5.28
Eccentricity · e
0.2699

Orbit and dynamics

Between its closest point (0.871 AU) and its farthest (1.515 AU), the heliocentric distance changes by 0.644 AU over every revolution.

One full revolution takes 1.30 yr (476 days), computed from the semi-major axis of 1.193 AU.

An eccentricity of 0.27 makes the orbit moderately elongated.

The orbital plane is tilted 7.18° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36 km/s at perihelion and falls to 20.7 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

The measured diameter is 0.08 km, a value from direct size determination rather than from brightness alone.

A geometric albedo of 0.448 points to a comparatively bright, reflective surface.

Observation record and orbit quality

Astrometry from 186 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4624 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
1.193 AU
Eccentricity
0.2699
Perihelion
0.871 AU
Aphelion
1.514991 AU
Inclination
7.18°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
236.63°

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
0.083 km
Albedo
0.448
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
21.85

Orbit Quality

RMS
0.46243
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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