SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 UB5

2017 UB5

2017 UB5 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.887 AU once every 2.59 yr.

Amor Observations: 64
Orbital Period · P
2.59 yr
v(q)
30.5 km/s
v(Q)
15.4 km/s
Diameter · ≈
0.16 km
TJ
3.9
Eccentricity · e
0.3273

Orbit and dynamics

The path is an ellipse reaching 1.269 AU from the Sun at perihelion and 2.505 AU at aphelion, a radial span of 1.236 AU.

Applying Kepler's third law to a = 1.887 AU gives an orbital period of 2.59 yr, or about 947 days.

An eccentricity of 0.327 makes the orbit moderately elongated.

Its inclination of 1.88° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 30.5 km/s at perihelion and falls to 15.4 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 = 21.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.16 km.

Observation record and orbit quality

The current orbit solution is based on 64 observations and has a weighted RMS residual of 0.4007 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
1.887 AU
Eccentricity
0.3273
Perihelion
1.269 AU
Aphelion
2.504615 AU
Inclination
1.88°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
98.26°

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
2030-Dec-20 18:15 0.310098 AU
46390045 km
0.34 km/s
2044-Jan-13 09:46 0.397623 AU
59483566 km
1.86 km/s
2061-Oct-27 06:48 0.409219 AU
61218340 km
2.13 km/s
2074-Nov-20 06:43 0.262746 AU
39306270 km
0.28 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
21.8

Orbit Quality

RMS
0.4007
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.