SpaceAtlas Space Object Data
NASA JPL SBDB · 50P

Arend

Arend follows a distinctly cometary orbit: an eccentricity of 0.531 carries it from 1.918 AU at perihelion out to 6.256 AU at aphelion.

comet Observations: 1,874
Orbital Period · P
8.26 yr
v(q)
26.6 km/s
v(Q)
8.2 km/s
TJ
2.69
Eccentricity · e
0.5306

Orbit and dynamics

The path is an ellipse reaching 1.918 AU from the Sun at perihelion and 6.256 AU at aphelion, a radial span of 4.338 AU.

Applying Kepler's third law to a = 4.087 AU gives an orbital period of 8.26 yr, or about 3,018 days.

The high eccentricity (0.531) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 19.16° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 26.6 km/s at perihelion and falls to 8.2 km/s at aphelion.

Its Tisserand parameter with respect to Jupiter is T_J = 2.69, a standard discriminator between asteroidal and cometary dynamics.

Size and surface

The measured diameter is 1.9 km, a value from direct size determination rather than from brightness alone.

Observation record and orbit quality

The current orbit solution is based on 1,874 observations and has a weighted RMS residual of 0.6918 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
4.087 AU
Eccentricity
0.5306
Perihelion
1.918 AU
Aphelion
6.255562 AU
Inclination
19.16°
Orbital Period
— yr
Epoch
2455743.5
Mean Anomaly
159.38°

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
1.9 km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
—

Orbit Quality

RMS
0.69176
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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