SpaceAtlas Space Object Data
NASA JPL SBDB · 2008 TJ

2008 TJ

2008 TJ is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.559 AU once every 1.95 yr.

Amor Observations: 20
Orbital Period · P
1.95 yr
v(q)
33.1 km/s
v(Q)
17.2 km/s
Diameter · ≈
0.02 km
TJ
4.37
Eccentricity · e
0.3172

Orbit and dynamics

The path is an ellipse reaching 1.065 AU from the Sun at perihelion and 2.054 AU at aphelion, a radial span of 0.989 AU.

Applying Kepler's third law to a = 1.559 AU gives an orbital period of 1.95 yr, or about 711 days.

An eccentricity of 0.317 makes the orbit moderately elongated.

Its inclination of 3.49° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 33.1 km/s at perihelion and falls to 17.2 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 26.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 20 observations and has a weighted RMS residual of 0.6142 arcseconds.

Condition code U = 9 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.559 AU
Eccentricity
0.3172
Perihelion
1.065 AU
Aphelion
2.053515 AU
Inclination
3.49°
Orbital Period
— yr
Epoch
2454741.5
Mean Anomaly
10.62°

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
26.7

Orbit Quality

RMS
0.61418
Condition
9
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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