SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 MB4

2019 MB4

2019 MB4 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.025 AU once every 2.88 yr.

Amor Observations: 59
Orbital Period · P
2.88 yr
v(q)
36.1 km/s
v(Q)
12.1 km/s
Diameter · ≈
0.02 km
TJ
3.65
Eccentricity · e
0.4972

Orbit and dynamics

Between its closest point (1.018 AU) and its farthest (3.032 AU), the heliocentric distance changes by 2.014 AU over every revolution.

One full revolution takes 2.88 yr (1,053 days), computed from the semi-major axis of 2.025 AU.

The high eccentricity (0.497) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 2.58° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 36.1 km/s at perihelion and falls to 12.1 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 26 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 59 individual observations underpins this orbit; the fit leaves an RMS residual of 0.2627 arcseconds.

Condition code U = 5 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
2.025 AU
Eccentricity
0.4972
Perihelion
1.018 AU
Aphelion
3.03183 AU
Inclination
2.58°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
144.6°

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
2042-Aug-30 02:47 0.293611 AU
43923571 km
16.83 km/s
2045-May-22 10:05 0.210233 AU
31450466 km
14.38 km/s
2068-Aug-18 16:58 0.121100 AU
18116293 km
12.02 km/s
2071-May-14 02:05 0.352984 AU
52805674 km
18.92 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
26.0

Orbit Quality

RMS
0.26272
Condition
5
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.