SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 KY

2019 KY

2019 KY belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.23 AU it takes 1.36 yr to circle the Sun.

Apollo Observations: 45
Orbital Period · P
1.36 yr
v(q)
33.1 km/s
v(Q)
21.8 km/s
Diameter · ≈
0.02 km
TJ
5.17
Eccentricity · e
0.2067

Orbit and dynamics

Between its closest point (0.976 AU) and its farthest (1.484 AU), the heliocentric distance changes by 0.508 AU over every revolution.

One full revolution takes 1.36 yr (498 days), computed from the semi-major axis of 1.23 AU.

An eccentricity of 0.207 makes the orbit moderately elongated.

The orbital plane is tilted 7.25° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.1 km/s at perihelion and falls to 21.8 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 = 26.32 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 45 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5755 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.23 AU
Eccentricity
0.2067
Perihelion
0.976 AU
Aphelion
1.484241 AU
Inclination
7.25°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
21.72°

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-11 21:44 0.444244 AU
66457908 km
8.20 km/s
2034-Jun-09 08:18 0.012460 AU
1863961 km
5.55 km/s
2038-Feb-28 02:43 0.456890 AU
68349790 km
7.24 km/s
2038-Oct-03 02:04 0.491060 AU
73461519 km
18.84 km/s
2045-May-11 08:30 0.302435 AU
45243629 km
15.41 km/s
2045-Nov-25 05:28 0.379957 AU
56840716 km
7.38 km/s
2049-Sep-11 17:11 0.131127 AU
19616330 km
7.52 km/s
2056-Dec-23 09:19 0.468113 AU
70028751 km
8.64 km/s
2064-Mar-12 00:57 0.398233 AU
59574837 km
6.44 km/s
2064-Sep-27 06:57 0.310306 AU
46421158 km
15.18 km/s
2071-Dec-10 02:05 0.436839 AU
65350224 km
8.12 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
26.32

Orbit Quality

RMS
0.57554
Condition
6
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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