SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 MS3

2019 MS3

2019 MS3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.63 AU it takes 4.27 yr to circle the Sun.

Apollo Observations: 100
Orbital Period · P
4.27 yr
v(q)
45.5 km/s
v(Q)
7.4 km/s
Diameter · ≈
0.29 km
TJ
2.95
Eccentricity · e
0.7199

Orbit and dynamics

The path is an ellipse reaching 0.737 AU from the Sun at perihelion and 4.523 AU at aphelion, a radial span of 3.786 AU.

Applying Kepler's third law to a = 2.63 AU gives an orbital period of 4.27 yr, or about 1,558 days.

The high eccentricity (0.72) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 8.61° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 45.5 km/s at perihelion and falls to 7.4 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 = 20.41 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.29 km.

Observation record and orbit quality

The current orbit solution is based on 100 observations and has a weighted RMS residual of 0.4581 arcseconds.

Condition code U = 4 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
2.63 AU
Eccentricity
0.7199
Perihelion
0.737 AU
Aphelion
4.523337 AU
Inclination
8.61°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
199.62°

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-Jun-28 07:49 0.448534 AU
67099798 km
31.35 km/s
2036-Dec-30 03:15 0.373103 AU
55815412 km
28.86 km/s
2049-Aug-01 01:11 0.076832 AU
11493955 km
16.69 km/s
2066-Aug-29 13:06 0.228049 AU
34115628 km
14.85 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
20.41

Orbit Quality

RMS
0.45812
Condition
4
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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