SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 XE

2015 XE

2015 XE belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.57 AU it takes 1.97 yr to circle the Sun.

Apollo Observations: 173
Orbital Period · P
1.97 yr
v(q)
35 km/s
v(Q)
16.1 km/s
Diameter · ≈
0.04 km
TJ
4.34
Eccentricity · e
0.3684

Orbit and dynamics

The path is an ellipse reaching 0.991 AU from the Sun at perihelion and 2.148 AU at aphelion, a radial span of 1.157 AU.

Applying Kepler's third law to a = 1.57 AU gives an orbital period of 1.97 yr, or about 719 days.

An eccentricity of 0.368 makes the orbit moderately elongated.

Its inclination of 2.39° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35 km/s at perihelion and falls to 16.1 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

The measured diameter is 0.05 km, a value from direct size determination rather than from brightness alone.

A geometric albedo of 0.1 points to a comparatively bright, reflective surface.

Observation record and orbit quality

The current orbit solution is based on 173 observations and has a weighted RMS residual of 0.3086 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
1.57 AU
Eccentricity
0.3684
Perihelion
0.991 AU
Aphelion
2.148388 AU
Inclination
2.39°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
135.45°

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
2074-Dec-06 16:37 0.039952 AU
5976748 km
7.47 km/s
2076-Oct-15 14:15 0.026219 AU
3922265 km
5.77 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
0.048 km
Albedo
0.1
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
24.7

Orbit Quality

RMS
0.30858
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.