SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 MK

2019 MK

2019 MK belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.092 AU it takes 3.03 yr to circle the Sun.

Apollo Observations: 186
Orbital Period · P
3.03 yr
v(q)
49.6 km/s
v(Q)
8.5 km/s
Diameter · ≈
0.17 km
TJ
3.37
Eccentricity · e
0.706

Orbit and dynamics

Between its closest point (0.615 AU) and its farthest (3.569 AU), the heliocentric distance changes by 2.954 AU over every revolution.

One full revolution takes 3.03 yr (1,105 days), computed from the semi-major axis of 2.092 AU.

The high eccentricity (0.706) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 9.82° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 49.6 km/s at perihelion and falls to 8.5 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 = 21.56 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.17 km.

Observation record and orbit quality

Astrometry from 186 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3953 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
2.092 AU
Eccentricity
0.706
Perihelion
0.615 AU
Aphelion
3.568952 AU
Inclination
9.82°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
91.81°

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
2043-Dec-10 11:28 0.190254 AU
28461546 km
16.11 km/s
2046-Dec-21 16:31 0.084780 AU
12682897 km
21.13 km/s
2049-Dec-30 00:42 0.189055 AU
28282171 km
26.21 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
21.56

Orbit Quality

RMS
0.39527
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

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