SpaceAtlas Space Object Data
NASA JPL SBDB · 455184

455184

455184 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.835 AU and a period of 0.76 yr.

Aten Observations: 168
Orbital Period · P
0.76 yr
v(q)
62 km/s
v(Q)
17.1 km/s
Diameter · ≈
0.2 km
TJ
6.87
Eccentricity · e
0.5667

Orbit and dynamics

The path is an ellipse reaching 0.362 AU from the Sun at perihelion and 1.308 AU at aphelion, a radial span of 0.946 AU.

Applying Kepler's third law to a = 0.835 AU gives an orbital period of 0.76 yr, or about 279 days.

The high eccentricity (0.567) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 13.78° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 62 km/s at perihelion and falls to 17.1 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 = 21.23 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.2 km.

Observation record and orbit quality

The current orbit solution is based on 168 observations and has a weighted RMS residual of 0.4421 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
0.8349 AU
Eccentricity
0.5667
Perihelion
0.362 AU
Aphelion
1.308038 AU
Inclination
13.78°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
57.28°

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-Mar-16 06:32 0.039668 AU
5934320 km
18.57 km/s
2045-Mar-17 11:30 0.098362 AU
14714816 km
15.59 km/s
2058-Mar-15 12:17 0.073163 AU
10945050 km
19.97 km/s
2074-Mar-17 21:15 0.067849 AU
10150065 km
16.44 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
21.23

Orbit Quality

RMS
0.44206
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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