SpaceAtlas Space Object Data
NASA JPL SBDB · 2022 WN4

2022 WN4

2022 WN4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.102 AU it takes 1.16 yr to circle the Sun.

Apollo Observations: 118
Orbital Period · P
1.16 yr
v(q)
33.1 km/s
v(Q)
24.3 km/s
Diameter · ≈
0.16 km
TJ
5.53
Eccentricity · e
0.1528

Orbit and dynamics

The path is an ellipse reaching 0.934 AU from the Sun at perihelion and 1.27 AU at aphelion, a radial span of 0.336 AU.

Applying Kepler's third law to a = 1.102 AU gives an orbital period of 1.16 yr, or about 423 days.

An eccentricity of 0.153 makes the orbit moderately elongated.

A steep inclination of 27.95° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 33.1 km/s at perihelion and falls to 24.3 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 = 21.76 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.16 km.

Observation record and orbit quality

The current orbit solution is based on 118 observations and has a weighted RMS residual of 0.4693 arcseconds.

Condition code U = 3 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
1.102 AU
Eccentricity
0.1528
Perihelion
0.934 AU
Aphelion
1.270386 AU
Inclination
27.95°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
251.7°

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
2029-Dec-24 02:04 0.285151 AU
42658013 km
16.66 km/s
2030-May-24 12:41 0.363984 AU
54451179 km
16.41 km/s
2037-Dec-07 16:47 0.321885 AU
48153321 km
14.27 km/s
2038-Jun-25 10:57 0.230598 AU
34496959 km
17.88 km/s
2044-Dec-19 17:44 0.188084 AU
28137026 km
14.66 km/s
2045-Jun-06 18:33 0.126766 AU
18963913 km
14.73 km/s
2051-Dec-25 08:18 0.375754 AU
56211999 km
18.49 km/s
2052-May-16 08:27 0.487274 AU
72895127 km
18.29 km/s
2052-Nov-24 15:17 0.459183 AU
68692856 km
14.33 km/s
2053-Jul-06 20:56 0.458396 AU
68575087 km
22.39 km/s
2059-Dec-13 17:07 0.248302 AU
37145412 km
14.20 km/s
2060-Jun-18 04:46 0.099552 AU
14892762 km
16.00 km/s
2066-Dec-22 23:51 0.222787 AU
33328462 km
15.49 km/s
2067-May-31 05:02 0.253503 AU
37923492 km
15.26 km/s
2073-Dec-24 16:17 0.472482 AU
70682249 km
20.65 km/s
2074-Dec-02 10:06 0.389609 AU
58284740 km
14.35 km/s
2075-Jul-01 15:22 0.343885 AU
51444529 km
19.97 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
21.76

Orbit Quality

RMS
0.46934
Condition
3
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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