SpaceAtlas Space Object Data
NASA JPL SBDB · 138P

Shoemaker-Levy

Shoemaker-Levy follows a distinctly cometary orbit: an eccentricity of 0.53 carries it from 1.701 AU at perihelion out to 5.543 AU at aphelion.

comet Observations: 171
Encyclopedia excerpt
Comet Shoemaker–Levy 9 was a comet that broke apart in July 1992 and collided with Jupiter in July 1994, providing the first direct observation of an extraterrestrial collision of Solar System objects. This generated a large amount of coverage in the popular media, and the comet was closely observed by astronomers worldwide. The collision provided new information about Jupiter and highlighted its possible role in reducing space debris in the inner Solar System.
Orbital Period · P
6.89 yr
v(q)
28.3 km/s
v(Q)
8.7 km/s
TJ
2.83
Eccentricity · e
0.5305

Orbit and dynamics

The path is an ellipse reaching 1.701 AU from the Sun at perihelion and 5.543 AU at aphelion, a radial span of 3.842 AU.

Applying Kepler's third law to a = 3.622 AU gives an orbital period of 6.89 yr, or about 2,518 days.

The high eccentricity (0.53) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 10.08° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 28.3 km/s at perihelion and falls to 8.7 km/s at aphelion.

Its Tisserand parameter with respect to Jupiter is T_J = 2.83, a standard discriminator between asteroidal and cometary dynamics.

Size and surface

Neither a measured diameter nor a reliable absolute magnitude is available for Shoemaker-Levy, so its physical size remains unconstrained.

Observation record and orbit quality

The current orbit solution is based on 171 observations and has a weighted RMS residual of 0.5366 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
3.622 AU
Eccentricity
0.5305
Perihelion
1.701 AU
Aphelion
5.543471 AU
Inclination
10.08°
Orbital Period
— yr
Epoch
2455923.5
Mean Anomaly
336.16°

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
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
—

Orbit Quality

RMS
0.53656
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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