SpaceAtlas Space Object Data
NASA JPL SBDB · 474611

474611

474611 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.866 AU and a period of 0.81 yr.

Aten Observations: 273
Orbital Period · P
0.81 yr
v(q)
40.8 km/s
v(Q)
25.1 km/s
Diameter · ≈
0.5 km
TJ
6.76
Eccentricity · e
0.2378

Orbit and dynamics

The path is an ellipse reaching 0.66 AU from the Sun at perihelion and 1.072 AU at aphelion, a radial span of 0.412 AU.

Applying Kepler's third law to a = 0.866 AU gives an orbital period of 0.81 yr, or about 294 days.

An eccentricity of 0.238 makes the orbit moderately elongated.

The orbital plane is tilted 18.69° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 40.8 km/s at perihelion and falls to 25.1 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 = 19.26 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.5 km.

Observation record and orbit quality

The current orbit solution is based on 273 observations and has a weighted RMS residual of 0.4754 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
0.8658 AU
Eccentricity
0.2378
Perihelion
0.66 AU
Aphelion
1.071687 AU
Inclination
18.69°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
171.55°

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
2033-Jul-25 22:52 0.176081 AU
26341365 km
9.43 km/s
2037-Jul-30 12:41 0.053380 AU
7985497 km
11.25 km/s
2041-Aug-06 17:35 0.194427 AU
29085871 km
15.11 km/s
2062-Jul-30 13:02 0.052523 AU
7857301 km
11.16 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
19.26

Orbit Quality

RMS
0.47537
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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