SpaceAtlas Space Object Data
NASA JPL SBDB · 620066

620066

620066 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.865 AU it takes 2.55 yr to circle the Sun.

Apollo Observations: 403
Orbital Period · P
2.55 yr
v(q)
44.1 km/s
v(Q)
10.8 km/s
Diameter · ≈
0.38 km
TJ
3.74
Eccentricity · e
0.607

Orbit and dynamics

The path is an ellipse reaching 0.733 AU from the Sun at perihelion and 2.997 AU at aphelion, a radial span of 2.264 AU.

Applying Kepler's third law to a = 1.865 AU gives an orbital period of 2.55 yr, or about 930 days.

The high eccentricity (0.607) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 0.25° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 44.1 km/s at perihelion and falls to 10.8 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 = 19.86 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.38 km.

Observation record and orbit quality

The current orbit solution is based on 403 observations and has a weighted RMS residual of 0.37 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
1.865 AU
Eccentricity
0.607
Perihelion
0.733 AU
Aphelion
2.997055 AU
Inclination
0.25°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
14.57°

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
2038-Dec-24 04:12 0.154911 AU
23174294 km
11.83 km/s
2044-Apr-06 22:58 0.156179 AU
23364025 km
11.83 km/s
2072-May-02 19:04 0.071556 AU
10704669 km
17.92 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
19.86

Orbit Quality

RMS
0.37004
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.

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