SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 XD3

2019 XD3

2019 XD3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.183 AU it takes 1.29 yr to circle the Sun.

Apollo Observations: 60
Orbital Period · P
1.29 yr
v(q)
43.1 km/s
v(Q)
17.4 km/s
Diameter · ≈
0.35 km
TJ
4.83
Eccentricity · e
0.4242

Orbit and dynamics

Between its closest point (0.681 AU) and its farthest (1.685 AU), the heliocentric distance changes by 1.004 AU over every revolution.

One full revolution takes 1.29 yr (470 days), computed from the semi-major axis of 1.183 AU.

The high eccentricity (0.424) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 60.43° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 43.1 km/s at perihelion and falls to 17.4 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 = 20.01 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.35 km.

Observation record and orbit quality

Astrometry from 60 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3917 arcseconds.

Condition code U = 2 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
1.183 AU
Eccentricity
0.4242
Perihelion
0.681 AU
Aphelion
1.684829 AU
Inclination
60.43°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
218.09°

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
2033-May-27 04:38 0.319982 AU
47868557 km
37.90 km/s
2042-May-28 14:24 0.319568 AU
47806671 km
37.93 km/s
2051-May-30 08:03 0.320028 AU
47875458 km
37.98 km/s
2060-May-31 05:37 0.322279 AU
48212310 km
38.06 km/s
2069-Jun-02 12:19 0.326875 AU
48899803 km
38.16 km/s
2078-Jun-05 00:47 0.335007 AU
50116378 km
38.30 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
20.01

Orbit Quality

RMS
0.39168
Condition
2
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.