SpaceAtlas Space Object Data
NASA JPL SBDB · 2008 DW22

2008 DW22

2008 DW22 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.75 AU once every 2.32 yr.

Amor Observations: 28
Orbital Period · P
2.32 yr
v(q)
33.7 km/s
v(Q)
15.1 km/s
Diameter · ≈
0.03 km
TJ
4.05
Eccentricity · e
0.3814

Orbit and dynamics

Between its closest point (1.082 AU) and its farthest (2.417 AU), the heliocentric distance changes by 1.335 AU over every revolution.

One full revolution takes 2.32 yr (846 days), computed from the semi-major axis of 1.75 AU.

An eccentricity of 0.381 makes the orbit moderately elongated.

Its inclination of 0.84° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 33.7 km/s at perihelion and falls to 15.1 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 = 25.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 28 individual observations underpins this orbit; the fit leaves an RMS residual of 0.9947 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.75 AU
Eccentricity
0.3814
Perihelion
1.082 AU
Aphelion
2.41745 AU
Inclination
0.84°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
312.96°

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-Apr-20 06:05 0.155445 AU
23254199 km
10.14 km/s
2059-Feb-19 14:53 0.288757 AU
43197467 km
15.08 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
25.6

Orbit Quality

RMS
0.99474
Condition
6
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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