SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 UG

2019 UG

2019 UG belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.516 AU it takes 1.87 yr to circle the Sun.

Apollo Observations: 71
Orbital Period · P
1.87 yr
v(q)
39.7 km/s
v(Q)
14.8 km/s
Diameter · ≈
0.01 km
TJ
4.39
Eccentricity · e
0.4576

Orbit and dynamics

Between its closest point (0.822 AU) and its farthest (2.21 AU), the heliocentric distance changes by 1.388 AU over every revolution.

One full revolution takes 1.87 yr (682 days), computed from the semi-major axis of 1.516 AU.

The high eccentricity (0.458) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 0.33° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 39.7 km/s at perihelion and falls to 14.8 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 = 28.1 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 71 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5253 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
1.516 AU
Eccentricity
0.4576
Perihelion
0.822 AU
Aphelion
2.209722 AU
Inclination
0.33°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
225.28°

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-Nov-09 11:42 0.320831 AU
47995683 km
23.60 km/s
2049-May-21 00:20 0.109049 AU
16313429 km
18.61 km/s
2060-Nov-02 16:31 0.194818 AU
29144356 km
19.37 km/s
2062-Jun-18 09:59 0.059636 AU
8921389 km
9.50 km/s
2077-May-14 01:33 0.292076 AU
43693936 km
22.72 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
28.1

Orbit Quality

RMS
0.52527
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.