SpaceAtlas Space Object Data
NASA JPL SBDB · 2008 DJ

2008 DJ

2008 DJ belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.982 AU it takes 2.79 yr to circle the Sun.

Apollo Observations: 200
Orbital Period · P
2.79 yr
v(q)
42.5 km/s
v(Q)
10.5 km/s
Diameter · ≈
0.27 km
TJ
3.61
Eccentricity · e
0.6025

Orbit and dynamics

Between its closest point (0.788 AU) and its farthest (3.176 AU), the heliocentric distance changes by 2.388 AU over every revolution.

One full revolution takes 2.79 yr (1,019 days), computed from the semi-major axis of 1.982 AU.

The high eccentricity (0.603) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 5.06° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 42.5 km/s at perihelion and falls to 10.5 km/s at aphelion.

Because q < 1 AU and Q > 1 AU, this orbit geometrically intersects the region of Earth's orbit.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 20.62 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.27 km.

Observation record and orbit quality

Astrometry from 200 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4808 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
1.982 AU
Eccentricity
0.6025
Perihelion
0.788 AU
Aphelion
3.176155 AU
Inclination
5.06°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
217.34°

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

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2035-Nov-19 00:33 0.196319 AU
29368959 km
11.77 km/s
2049-Oct-10 16:44 0.086280 AU
12907350 km
13.09 km/s
2061-Mar-03 01:05 0.354763 AU
53071836 km
25.24 km/s
2063-Sep-20 03:32 0.253110 AU
37864691 km
21.73 km/s
2075-Feb-13 10:43 0.052252 AU
7816746 km
16.15 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
20.62

Orbit Quality

RMS
0.48085
Condition
0
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. 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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.