SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 KD4

2019 KD4

2019 KD4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.103 AU it takes 1.16 yr to circle the Sun.

Apollo Observations: 10
Orbital Period · P
1.16 yr
v(q)
32.9 km/s
v(Q)
24.5 km/s
Diameter · ≈
0.01 km
TJ
5.63
Eccentricity · e
0.1463

Orbit and dynamics

Between its closest point (0.942 AU) and its farthest (1.264 AU), the heliocentric distance changes by 0.322 AU over every revolution.

One full revolution takes 1.16 yr (423 days), computed from the semi-major axis of 1.103 AU.

An eccentricity of 0.146 makes the orbit moderately elongated.

Its inclination of 4.28° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 32.9 km/s at perihelion and falls to 24.5 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 = 28 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 10 individual observations underpins this orbit; the fit leaves an RMS residual of 0.9128 arcseconds.

Condition code U = 7 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
1.103 AU
Eccentricity
0.1463
Perihelion
0.942 AU
Aphelion
1.264369 AU
Inclination
4.28°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
80.63°

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
2032-Dec-29 20:33 0.174494 AU
26103940 km
13.22 km/s
2034-Jun-15 03:37 0.318230 AU
47606568 km
17.59 km/s
2055-Jan-04 11:47 0.077071 AU
11529714 km
9.40 km/s
2062-Oct-05 08:29 0.251216 AU
37581349 km
5.20 km/s
2063-Jun-05 20:55 0.210788 AU
31533374 km
12.13 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
28.0

Orbit Quality

RMS
0.91276
Condition
7
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.

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