SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 XC

2015 XC

2015 XC belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.18 AU it takes 1.28 yr to circle the Sun.

Apollo Observations: 211
Orbital Period · P
1.28 yr
v(q)
37.1 km/s
v(Q)
20.3 km/s
Diameter · ≈
0.03 km
TJ
5.32
Eccentricity · e
0.2934

Orbit and dynamics

Between its closest point (0.834 AU) and its farthest (1.526 AU), the heliocentric distance changes by 0.692 AU over every revolution.

One full revolution takes 1.28 yr (468 days), computed from the semi-major axis of 1.18 AU.

An eccentricity of 0.293 makes the orbit moderately elongated.

Its inclination of 4.87° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 37.1 km/s at perihelion and falls to 20.3 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 = 25.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 211 individual observations underpins this orbit; the fit leaves an RMS residual of 0.2637 arcseconds.

Condition code U = 3 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
1.18 AU
Eccentricity
0.2934
Perihelion
0.834 AU
Aphelion
1.526212 AU
Inclination
4.87°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
27.81°

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
2029-Oct-01 12:43 0.440449 AU
65890305 km
7.96 km/s
2030-May-08 15:08 0.047064 AU
7040628 km
9.03 km/s
2033-Nov-18 07:41 0.353703 AU
52913251 km
18.70 km/s
2038-Oct-14 21:12 0.389810 AU
58314684 km
7.11 km/s
2039-Apr-21 15:14 0.109109 AU
16322422 km
5.46 km/s
2042-Nov-11 14:38 0.498025 AU
74503546 km
23.01 km/s
2047-Nov-04 14:40 0.303491 AU
45401537 km
5.47 km/s
2048-Feb-25 18:38 0.171864 AU
25710465 km
6.94 km/s
2048-May-29 18:05 0.267100 AU
39957654 km
4.78 km/s
2057-Jan-08 20:16 0.131533 AU
19677095 km
5.99 km/s
2057-Jun-23 05:38 0.365284 AU
54645713 km
6.72 km/s
2062-May-27 04:55 0.383382 AU
57353163 km
19.25 km/s
2065-Dec-08 12:29 0.010168 AU
1521182 km
8.09 km/s
2066-Jul-05 23:06 0.423862 AU
63408898 km
7.63 km/s
2071-May-26 17:31 0.379510 AU
56773856 km
19.25 km/s
2074-Dec-23 11:14 0.090254 AU
13501848 km
5.84 km/s
2075-Jun-27 08:19 0.384591 AU
57533941 km
7.04 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
25.2

Orbit Quality

RMS
0.26374
Condition
3
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.

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