SpaceAtlas Space Object Data
NASA JPL SBDB · 523814

523814

523814 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.418 AU it takes 1.69 yr to circle the Sun.

Apollo Observations: 267
Orbital Period · P
1.69 yr
v(q)
34.5 km/s
v(Q)
18.1 km/s
Diameter · ≈
0.24 km
TJ
4.66
Eccentricity · e
0.3119

Orbit and dynamics

Between its closest point (0.976 AU) and its farthest (1.86 AU), the heliocentric distance changes by 0.884 AU over every revolution.

One full revolution takes 1.69 yr (617 days), computed from the semi-major axis of 1.418 AU.

An eccentricity of 0.312 makes the orbit moderately elongated.

Its inclination of 3.75° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 34.5 km/s at perihelion and falls to 18.1 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 = 20.81 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.24 km.

Observation record and orbit quality

Astrometry from 267 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5037 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
1.418 AU
Eccentricity
0.3119
Perihelion
0.976 AU
Aphelion
1.860274 AU
Inclination
3.75°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
86.25°

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
2036-Apr-04 00:33 0.081672 AU
12217922 km
7.44 km/s
2058-Jan-31 04:59 0.064384 AU
9631651 km
4.90 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
20.81

Orbit Quality

RMS
0.5037
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.

Keep exploring

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