SpaceAtlas Space Object Data
NASA JPL SBDB · 475P

Spacewatch-LINEAR

Spacewatch-LINEAR follows a distinctly cometary orbit: an eccentricity of 0.44 carries it from 4.088 AU at perihelion out to 10.508 AU at aphelion.

comet Observations: 159
Orbital Period · P
19.7 yr
v(q)
17.7 km/s
v(Q)
6.9 km/s
TJ
2.77
Eccentricity · e
0.4398

Orbit and dynamics

Between its closest point (4.088 AU) and its farthest (10.508 AU), the heliocentric distance changes by 6.42 AU over every revolution.

One full revolution takes 19.7 yr (7,201 days), computed from the semi-major axis of 7.298 AU.

The high eccentricity (0.44) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 14.53° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 17.7 km/s at perihelion and falls to 6.9 km/s at aphelion.

Its Tisserand parameter with respect to Jupiter is T_J = 2.77, a standard discriminator between asteroidal and cometary dynamics.

Size and surface

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

Observation record and orbit quality

Astrometry from 159 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6449 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
7.298 AU
Eccentricity
0.4398
Perihelion
4.088 AU
Aphelion
10.50766 AU
Inclination
14.53°
Orbital Period
— yr
Epoch
2456149.5
Mean Anomaly
144.02°

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
0.64489
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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