SpaceAtlas Space Object Data
NASA JPL SBDB · 1998 M6

Montani

Montani follows a distinctly cometary orbit: an eccentricity of 0.999 carries it from 5.979 AU at perihelion out to 10,666 AU at aphelion.

comet Observations: 94
Orbital Period · P
389,784 yr
v(q)
17.2 km/s
v(Q)
0 km/s
TJ
-0.08
Eccentricity · e
0.9989

Orbit and dynamics

Between its closest point (5.979 AU) and its farthest (10,666 AU), the heliocentric distance changes by 10,660 AU over every revolution.

One full revolution takes 389,784 yr (142,368,515 days), computed from the semi-major axis of 5,336.0 AU.

The high eccentricity (0.999) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 91.54° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 17.2 km/s at perihelion and falls to 0 km/s at aphelion.

Its Tisserand parameter with respect to Jupiter is T_J = -0.08, a standard discriminator between asteroidal and cometary dynamics.

Size and surface

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

Observation record and orbit quality

Astrometry from 94 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5269 arcseconds.

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
5336.0 AU
Eccentricity
0.9989
Perihelion
5.979 AU
Aphelion
10666.1304 AU
Inclination
91.54°
Orbital Period
— yr
Epoch
2451026.5
Mean Anomaly
360.0°

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
0.52694
Condition
—
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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