SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 KM2

2019 KM2

2019 KM2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.035 AU it takes 1.05 yr to circle the Sun.

Apollo Observations: 14
Orbital Period · P
1.05 yr
v(q)
32 km/s
v(Q)
26.8 km/s
Diameter · ≈
0.03 km
TJ
5.91
Eccentricity · e
0.0894

Orbit and dynamics

Between its closest point (0.943 AU) and its farthest (1.128 AU), the heliocentric distance changes by 0.185 AU over every revolution.

One full revolution takes 1.05 yr (385 days), computed from the semi-major axis of 1.035 AU.

With e = 0.089, the orbit is close to circular.

Its inclination of 4.3° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 32 km/s at perihelion and falls to 26.8 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 = 25.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 14 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5013 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
1.035 AU
Eccentricity
0.0894
Perihelion
0.943 AU
Aphelion
1.127529 AU
Inclination
4.3°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
8.95°

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
2036-Oct-11 17:42 0.388598 AU
58133485 km
16.08 km/s
2037-Nov-04 01:52 0.068848 AU
10299541 km
6.29 km/s
2040-Apr-17 07:29 0.310430 AU
46439723 km
13.35 km/s
2056-Oct-26 03:59 0.214618 AU
32106396 km
9.58 km/s
2059-Apr-11 06:33 0.242955 AU
36345615 km
10.71 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
25.5

Orbit Quality

RMS
0.5013
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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