SpaceAtlas Space Object Data
NASA JPL SBDB · 461P

WISE

WISE follows a distinctly cometary orbit: an eccentricity of 0.57 carries it from 1.349 AU at perihelion out to 4.929 AU at aphelion.

comet Observations: 756
Orbital Period · P
5.56 yr
v(q)
32.1 km/s
v(Q)
8.8 km/s
TJ
2.87
Eccentricity · e
0.5704

Orbit and dynamics

The path is an ellipse reaching 1.349 AU from the Sun at perihelion and 4.929 AU at aphelion, a radial span of 3.58 AU.

Applying Kepler's third law to a = 3.139 AU gives an orbital period of 5.56 yr, or about 2,031 days.

The high eccentricity (0.57) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 18.41° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.1 km/s at perihelion and falls to 8.8 km/s at aphelion.

Its Tisserand parameter with respect to Jupiter is T_J = 2.87, 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 756 observations and has a weighted RMS residual of 0.3018 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
3.139 AU
Eccentricity
0.5704
Perihelion
1.349 AU
Aphelion
4.929486 AU
Inclination
18.41°
Orbital Period
— yr
Epoch
2458948.5
Mean Anomaly
263.58°

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
0.30178
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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