SpaceAtlas Space Object Data
NASA JPL SBDB · 245P

WISE

WISE follows a distinctly cometary orbit: an eccentricity of 0.462 carries it from 2.165 AU at perihelion out to 5.877 AU at aphelion.

comet Observations: 173
Orbital Period · P
8.06 yr
v(q)
24.5 km/s
v(Q)
9 km/s
TJ
2.75
Eccentricity · e
0.4615

Orbit and dynamics

The path is an ellipse reaching 2.165 AU from the Sun at perihelion and 5.877 AU at aphelion, a radial span of 3.712 AU.

Applying Kepler's third law to a = 4.021 AU gives an orbital period of 8.06 yr, or about 2,945 days.

The high eccentricity (0.462) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 21.29° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 24.5 km/s at perihelion and falls to 9 km/s at aphelion.

Its Tisserand parameter with respect to Jupiter is T_J = 2.75, 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 173 observations and has a weighted RMS residual of 0.5255 arcseconds.

Condition code U = 1 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
4.021 AU
Eccentricity
0.4615
Perihelion
2.165 AU
Aphelion
5.876691 AU
Inclination
21.29°
Orbital Period
— yr
Epoch
2457004.5
Mean Anomaly
219.04°

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
0.52549
Condition
1
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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