SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 UB2

2019 UB2

2019 UB2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.498 AU it takes 3.95 yr to circle the Sun.

Apollo Observations: 30
Orbital Period · P
3.95 yr
v(q)
37.6 km/s
v(Q)
9.4 km/s
Diameter · ≈
0.02 km
TJ
3.19
Eccentricity · e
0.5983

Orbit and dynamics

The path is an ellipse reaching 1.003 AU from the Sun at perihelion and 3.993 AU at aphelion, a radial span of 2.99 AU.

Applying Kepler's third law to a = 2.498 AU gives an orbital period of 3.95 yr, or about 1,442 days.

The high eccentricity (0.598) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 1.27° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 37.6 km/s at perihelion and falls to 9.4 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 25.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 30 observations and has a weighted RMS residual of 0.3941 arcseconds.

Condition code U = 8 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
2.498 AU
Eccentricity
0.5983
Perihelion
1.003 AU
Aphelion
3.992553 AU
Inclination
1.27°
Orbital Period
— yr
Epoch
2458782.5
Mean Anomaly
355.1°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
25.8

Orbit Quality

RMS
0.39406
Condition
8
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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