SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 XE1

2015 XE1

2015 XE1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.533 AU it takes 1.90 yr to circle the Sun.

Apollo Observations: 46
Orbital Period · P
1.90 yr
v(q)
34.7 km/s
v(Q)
16.7 km/s
Diameter · ≈
0.03 km
TJ
4.41
Eccentricity · e
0.3497

Orbit and dynamics

Between its closest point (0.997 AU) and its farthest (2.069 AU), the heliocentric distance changes by 1.072 AU over every revolution.

One full revolution takes 1.90 yr (693 days), computed from the semi-major axis of 1.533 AU.

An eccentricity of 0.35 makes the orbit moderately elongated.

Its inclination of 3.88° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 34.7 km/s at perihelion and falls to 16.7 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 = 25.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 46 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4781 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
1.533 AU
Eccentricity
0.3497
Perihelion
0.997 AU
Aphelion
2.06909 AU
Inclination
3.88°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
178.6°

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
2033-Mar-02 12:29 0.361035 AU
54010021 km
19.08 km/s
2052-Feb-16 19:30 0.203873 AU
30499006 km
11.80 km/s
2053-Nov-13 06:47 0.314251 AU
47011322 km
15.34 km/s
2054-Mar-23 20:30 0.427599 AU
63967906 km
4.40 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
25.7

Orbit Quality

RMS
0.47813
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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