SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 A4

PANSTARRS-Lemmon

PANSTARRS-Lemmon follows a distinctly cometary orbit: an eccentricity of 0.654 carries it from 2.843 AU at perihelion out to 13.574 AU at aphelion.

comet Observations: 106
Orbital Period · P
23.5 yr
v(q)
22.7 km/s
v(Q)
4.8 km/s
TJ
2.36
Eccentricity · e
0.6537

Orbit and dynamics

The path is an ellipse reaching 2.843 AU from the Sun at perihelion and 13.574 AU at aphelion, a radial span of 10.731 AU.

Applying Kepler's third law to a = 8.208 AU gives an orbital period of 23.5 yr, or about 8,589 days.

The high eccentricity (0.654) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 24.99° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 22.7 km/s at perihelion and falls to 4.8 km/s at aphelion.

Its Tisserand parameter with respect to Jupiter is T_J = 2.36, a standard discriminator between asteroidal and cometary dynamics.

Size and surface

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

Observation record and orbit quality

The current orbit solution is based on 106 observations and has a weighted RMS residual of 0.3903 arcseconds.

Condition code U = 3 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
8.208 AU
Eccentricity
0.6537
Perihelion
2.843 AU
Aphelion
13.57357 AU
Inclination
24.99°
Orbital Period
— yr
Epoch
2458882.5
Mean Anomaly
3.03°

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
0.39035
Condition
3
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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