SpaceAtlas Space Object Data
NASA JPL SBDB · 612536

612536

612536 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.421 AU it takes 1.69 yr to circle the Sun.

Apollo Observations: 352
Orbital Period · P
1.69 yr
v(q)
33.7 km/s
v(Q)
18.6 km/s
Diameter · ≈
0.31 km
TJ
4.63
Eccentricity · e
0.2893

Orbit and dynamics

Between its closest point (1.01 AU) and its farthest (1.832 AU), the heliocentric distance changes by 0.822 AU over every revolution.

One full revolution takes 1.69 yr (619 days), computed from the semi-major axis of 1.421 AU.

An eccentricity of 0.289 makes the orbit moderately elongated.

The orbital plane is tilted 13.78° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.7 km/s at perihelion and falls to 18.6 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 20.32 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.31 km.

Observation record and orbit quality

Astrometry from 352 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4894 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
1.421 AU
Eccentricity
0.2893
Perihelion
1.01 AU
Aphelion
1.832095 AU
Inclination
13.78°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
300.8°

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
2041-Dec-24 02:12 0.135582 AU
20282756 km
8.81 km/s
2064-Jan-02 04:36 0.054958 AU
8221611 km
8.30 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
20.32

Orbit Quality

RMS
0.48941
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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