SpaceAtlas Space Object Data
NASA JPL SBDB · 420302

420302

420302 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.137 AU once every 3.12 yr.

Amor Observations: 3,196
Orbital Period · P
3.12 yr
v(q)
33.6 km/s
v(Q)
12.4 km/s
Diameter · ≈
0.98 km
TJ
3.56
Eccentricity · e
0.4623

Orbit and dynamics

Between its closest point (1.149 AU) and its farthest (3.125 AU), the heliocentric distance changes by 1.976 AU over every revolution.

One full revolution takes 3.12 yr (1,141 days), computed from the semi-major axis of 2.137 AU.

The high eccentricity (0.462) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 6.67° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.6 km/s at perihelion and falls to 12.4 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 17.79 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.98 km.

Observation record and orbit quality

Astrometry from 3,196 individual observations underpins this orbit; the fit leaves an RMS residual of 0.2561 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
2.137 AU
Eccentricity
0.4623
Perihelion
1.149 AU
Aphelion
3.124935 AU
Inclination
6.67°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
315.29°

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
2045-Jul-22 07:25 0.152415 AU
22800985 km
5.90 km/s
2070-Jul-24 00:26 0.153426 AU
22952149 km
5.69 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
17.79

Orbit Quality

RMS
0.25607
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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