SpaceAtlas Space Object Data
NASA JPL SBDB · 337P

WISE

WISE follows a distinctly cometary orbit: an eccentricity of 0.497 carries it from 1.654 AU at perihelion out to 4.922 AU at aphelion.

comet Observations: 386
Orbital Period · P
5.96 yr
v(q)
28.3 km/s
v(Q)
9.5 km/s
TJ
2.91
Eccentricity · e
0.4969

Orbit and dynamics

The path is an ellipse reaching 1.654 AU from the Sun at perihelion and 4.922 AU at aphelion, a radial span of 3.268 AU.

Applying Kepler's third law to a = 3.288 AU gives an orbital period of 5.96 yr, or about 2,178 days.

The high eccentricity (0.497) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 15.37° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 28.3 km/s at perihelion and falls to 9.5 km/s at aphelion.

Its Tisserand parameter with respect to Jupiter is T_J = 2.91, a standard discriminator between asteroidal and cometary dynamics.

Size and surface

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

Observation record and orbit quality

The current orbit solution is based on 386 observations and has a weighted RMS residual of 0.421 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
3.288 AU
Eccentricity
0.4969
Perihelion
1.654 AU
Aphelion
4.921807 AU
Inclination
15.37°
Orbital Period
— yr
Epoch
2458351.5
Mean Anomaly
127.05°

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
0.42105
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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