SpaceAtlas Space Object Data
NASA JPL SBDB · 422637

422637

422637 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.827 AU once every 4.75 yr.

Amor Observations: 75
Orbital Period · P
4.75 yr
v(q)
35.9 km/s
v(Q)
8.7 km/s
Diameter · ≈
0.84 km
TJ
2.99
Eccentricity · e
0.6092

Orbit and dynamics

Between its closest point (1.105 AU) and its farthest (4.549 AU), the heliocentric distance changes by 3.444 AU over every revolution.

One full revolution takes 4.75 yr (1,736 days), computed from the semi-major axis of 2.827 AU.

The high eccentricity (0.609) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 9.83° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.9 km/s at perihelion and falls to 8.7 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 = 18.14 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.84 km.

Observation record and orbit quality

Astrometry from 75 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4934 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
2.827 AU
Eccentricity
0.6092
Perihelion
1.105 AU
Aphelion
4.549208 AU
Inclination
9.83°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
178.82°

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
2028-Nov-01 14:41 0.117780 AU
17619656 km
8.36 km/s
2047-Nov-25 21:43 0.307408 AU
45987604 km
14.49 km/s
2066-Nov-11 23:05 0.129809 AU
19419218 km
10.01 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
18.14

Orbit Quality

RMS
0.49335
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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