SpaceAtlas Space Object Data
NASA JPL SBDB · 2005 JD46

2005 JD46

2005 JD46 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.643 AU it takes 4.30 yr to circle the Sun.

Apollo Observations: 137
Orbital Period · P
4.30 yr
v(q)
52.9 km/s
v(Q)
6.3 km/s
Diameter · ≈
0.81 km
TJ
2.81
Eccentricity · e
0.7856

Orbit and dynamics

The path is an ellipse reaching 0.567 AU from the Sun at perihelion and 4.719 AU at aphelion, a radial span of 4.152 AU.

Applying Kepler's third law to a = 2.643 AU gives an orbital period of 4.30 yr, or about 1,569 days.

The high eccentricity (0.786) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 18.24° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 52.9 km/s at perihelion and falls to 6.3 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 = 18.22 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.81 km.

Observation record and orbit quality

The current orbit solution is based on 137 observations and has a weighted RMS residual of 0.4508 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
2.643 AU
Eccentricity
0.7856
Perihelion
0.567 AU
Aphelion
4.719341 AU
Inclination
18.24°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
341.23°

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
2030-Dec-01 12:21 0.392044 AU
58648954 km
22.25 km/s
2043-Oct-23 03:13 0.206958 AU
30960486 km
21.18 km/s
2056-Sep-28 09:42 0.237697 AU
35559025 km
29.03 km/s
2061-Apr-10 00:06 0.232899 AU
34841163 km
28.46 km/s
2074-Feb-11 01:53 0.423442 AU
63346021 km
17.94 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
18.22

Orbit Quality

RMS
0.45078
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.