SpaceAtlas Space Object Data
NASA JPL SBDB · 333889

333889

333889 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.817 AU and a period of 0.74 yr.

Aten Observations: 1,303
Orbital Period · P
0.74 yr
v(q)
70.6 km/s
v(Q)
15.4 km/s
Diameter · ≈
0.8 km
TJ
6.74
Eccentricity · e
0.642

Orbit and dynamics

The path is an ellipse reaching 0.292 AU from the Sun at perihelion and 1.341 AU at aphelion, a radial span of 1.049 AU.

Applying Kepler's third law to a = 0.817 AU gives an orbital period of 0.74 yr, or about 269 days.

The high eccentricity (0.642) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 53.3° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 70.6 km/s at perihelion and falls to 15.4 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

The measured diameter is 0.92 km, a value from direct size determination rather than from brightness alone.

A geometric albedo of 0.11 points to a comparatively bright, reflective surface.

Observation record and orbit quality

The current orbit solution is based on 1,303 observations and has a weighted RMS residual of 0.462 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
0.8165 AU
Eccentricity
0.642
Perihelion
0.292 AU
Aphelion
1.340693 AU
Inclination
53.3°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
9.1°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
0.919 km
Albedo
0.11
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
18.24

Orbit Quality

RMS
0.46201
Condition
0
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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