SpaceAtlas Space Object Data
NASA JPL SBDB · 2022 WR9

2022 WR9

2022 WR9 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.972 AU and a period of 0.96 yr.

Aten Observations: 18
Orbital Period · P
0.96 yr
v(q)
46.6 km/s
v(Q)
19.6 km/s
Diameter · ≈
0.01 km
TJ
6.13
Eccentricity · e
0.4082

Orbit and dynamics

The path is an ellipse reaching 0.575 AU from the Sun at perihelion and 1.369 AU at aphelion, a radial span of 0.794 AU.

Applying Kepler's third law to a = 0.972 AU gives an orbital period of 0.96 yr, or about 350 days.

The high eccentricity (0.408) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 9.86° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 46.6 km/s at perihelion and falls to 19.6 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 = 27.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 18 observations and has a weighted RMS residual of 0.7081 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
0.9721 AU
Eccentricity
0.4082
Perihelion
0.575 AU
Aphelion
1.368911 AU
Inclination
9.86°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
169.55°

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-Aug-12 04:10 0.254655 AU
38095895 km
23.52 km/s
2039-Jul-31 12:57 0.148810 AU
22261729 km
16.11 km/s
2045-Dec-03 23:31 0.017216 AU
2575551 km
12.75 km/s
2046-Nov-25 23:59 0.030198 AU
4517596 km
20.14 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
27.2

Orbit Quality

RMS
0.7081
Condition
7
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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