SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 CD1

2015 CD1

2015 CD1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.175 AU it takes 1.27 yr to circle the Sun.

Apollo Observations: 29
Orbital Period · P
1.27 yr
v(q)
33.2 km/s
v(Q)
22.8 km/s
Diameter · ≈
0.01 km
TJ
5.35
Eccentricity · e
0.1852

Orbit and dynamics

Between its closest point (0.957 AU) and its farthest (1.393 AU), the heliocentric distance changes by 0.436 AU over every revolution.

One full revolution takes 1.27 yr (465 days), computed from the semi-major axis of 1.175 AU.

An eccentricity of 0.185 makes the orbit moderately elongated.

The orbital plane is tilted 7.58° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.2 km/s at perihelion and falls to 22.8 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 = 28.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 29 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5913 arcseconds.

Condition code U = 6 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
1.175 AU
Eccentricity
0.1852
Perihelion
0.957 AU
Aphelion
1.39261 AU
Inclination
7.58°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
350.46°

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-Feb-11 14:08 0.000145 AU
21749 km
5.96 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
28.2

Orbit Quality

RMS
0.59133
Condition
6
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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