SpaceAtlas Space Object Data
NASA JPL SBDB · 2022 EW4

2022 EW4

2022 EW4 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.926 AU and a period of 0.89 yr.

Aten Observations: 44
Orbital Period · P
0.89 yr
v(q)
41.7 km/s
v(Q)
23 km/s
Diameter · ≈
0.02 km
TJ
6.42
Eccentricity · e
0.2901

Orbit and dynamics

The path is an ellipse reaching 0.657 AU from the Sun at perihelion and 1.194 AU at aphelion, a radial span of 0.537 AU.

Applying Kepler's third law to a = 0.926 AU gives an orbital period of 0.89 yr, or about 325 days.

An eccentricity of 0.29 makes the orbit moderately elongated.

The orbital plane is tilted 6.58° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 41.7 km/s at perihelion and falls to 23 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 = 26.39 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 44 observations and has a weighted RMS residual of 0.4986 arcseconds.

Condition code U = 5 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
0.9257 AU
Eccentricity
0.2901
Perihelion
0.657 AU
Aphelion
1.194246 AU
Inclination
6.58°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
10.32°

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
2030-Mar-07 20:00 0.092291 AU
13806492 km
11.41 km/s
2030-Nov-18 09:07 0.339625 AU
50807135 km
11.56 km/s
2031-Jun-22 20:30 0.168438 AU
25197910 km
5.36 km/s
2038-Mar-12 16:35 0.231133 AU
34576932 km
15.59 km/s
2038-Dec-08 20:14 0.319873 AU
47852260 km
10.21 km/s
2039-May-15 15:13 0.213844 AU
31990599 km
6.62 km/s
2039-Sep-02 08:39 0.257532 AU
38526194 km
8.12 km/s
2040-Jun-21 00:07 0.381913 AU
57133402 km
19.47 km/s
2046-Mar-19 02:52 0.384090 AU
57459000 km
20.28 km/s
2047-Jan-06 07:11 0.267337 AU
39993057 km
7.12 km/s
2047-Apr-16 01:37 0.197315 AU
29517873 km
6.75 km/s
2047-Sep-28 15:29 0.309266 AU
46265591 km
10.48 km/s
2048-Jun-27 19:50 0.241039 AU
36058904 km
14.93 km/s
2055-Mar-13 05:18 0.102650 AU
15356201 km
6.39 km/s
2055-Oct-21 23:15 0.336834 AU
50389643 km
11.73 km/s
2056-Jul-04 18:30 0.117860 AU
17631596 km
10.15 km/s
2063-Mar-06 14:25 0.035125 AU
5254696 km
9.78 km/s
2063-Nov-12 02:38 0.341246 AU
51049635 km
11.76 km/s
2064-Jul-09 00:38 0.142443 AU
21309156 km
5.65 km/s
2071-Mar-14 14:34 0.276042 AU
41295245 km
16.98 km/s
2071-Dec-18 05:00 0.305100 AU
45642342 km
9.30 km/s
2072-May-03 03:23 0.216798 AU
32432494 km
6.80 km/s
2072-Sep-13 14:24 0.281686 AU
42139638 km
9.23 km/s
2073-Jun-24 19:33 0.311465 AU
46594536 km
17.32 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
26.39

Orbit Quality

RMS
0.49856
Condition
5
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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