SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 XU2

2017 XU2

2017 XU2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.51 AU it takes 1.86 yr to circle the Sun.

Apollo Observations: 58
Orbital Period · P
1.86 yr
v(q)
46.8 km/s
v(Q)
12.6 km/s
Diameter · ≈
0.17 km
TJ
4.32
Eccentricity · e
0.5767

Orbit and dynamics

The path is an ellipse reaching 0.639 AU from the Sun at perihelion and 2.381 AU at aphelion, a radial span of 1.742 AU.

Applying Kepler's third law to a = 1.51 AU gives an orbital period of 1.86 yr, or about 678 days.

The high eccentricity (0.577) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 7.82° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 46.8 km/s at perihelion and falls to 12.6 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 = 21.65 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.17 km.

Observation record and orbit quality

The current orbit solution is based on 58 observations and has a weighted RMS residual of 0.3798 arcseconds.

Condition code U = 7 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
1.51 AU
Eccentricity
0.5767
Perihelion
0.639 AU
Aphelion
2.380817 AU
Inclination
7.82°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
238.57°

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-Nov-27 20:57 0.137708 AU
20600804 km
14.30 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
21.65

Orbit Quality

RMS
0.37976
Condition
7
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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