SpaceAtlas Space Object Data
NASA JPL SBDB · 203471

203471

203471 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.855 AU and a period of 0.79 yr.

Aten Observations: 472
Orbital Period · P
0.79 yr
v(q)
47.7 km/s
v(Q)
21.7 km/s
Diameter · ≈
0.46 km
TJ
6.8
Eccentricity · e
0.3736

Orbit and dynamics

The path is an ellipse reaching 0.536 AU from the Sun at perihelion and 1.175 AU at aphelion, a radial span of 0.639 AU.

Applying Kepler's third law to a = 0.855 AU gives an orbital period of 0.79 yr, or about 289 days.

An eccentricity of 0.374 makes the orbit moderately elongated.

The orbital plane is tilted 17.19° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 47.7 km/s at perihelion and falls to 21.7 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 = 19.45 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.46 km.

Observation record and orbit quality

The current orbit solution is based on 472 observations and has a weighted RMS residual of 0.4245 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
0.8554 AU
Eccentricity
0.3736
Perihelion
0.536 AU
Aphelion
1.174977 AU
Inclination
17.19°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
122.02°

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
2027-Dec-17 17:40 0.150022 AU
22442993 km
15.74 km/s
2031-Dec-26 13:33 0.132126 AU
19765698 km
11.43 km/s
2046-Dec-17 23:58 0.094669 AU
14162301 km
13.51 km/s
2051-Jan-04 12:48 0.181346 AU
27128949 km
11.22 km/s
2061-Dec-18 02:34 0.195574 AU
29257450 km
17.30 km/s
2065-Dec-23 03:11 0.110912 AU
16592180 km
11.70 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
19.45

Orbit Quality

RMS
0.42446
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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