SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 JC2

2015 JC2

2015 JC2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.487 AU it takes 1.81 yr to circle the Sun.

Apollo Observations: 62
Orbital Period · P
1.81 yr
v(q)
45.1 km/s
v(Q)
13.2 km/s
Diameter · ≈
0.24 km
TJ
4.38
Eccentricity · e
0.546

Orbit and dynamics

Between its closest point (0.675 AU) and its farthest (2.299 AU), the heliocentric distance changes by 1.624 AU over every revolution.

One full revolution takes 1.81 yr (662 days), computed from the semi-major axis of 1.487 AU.

The high eccentricity (0.546) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 10.43° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 45.1 km/s at perihelion and falls to 13.2 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 0.38 km, a value from direct size determination rather than from brightness alone.

Its geometric albedo of 0.048 indicates a very dark, carbonaceous-type surface.

Observation record and orbit quality

Astrometry from 62 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5222 arcseconds.

Condition code U = 0 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

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
1.487 AU
Eccentricity
0.546
Perihelion
0.675 AU
Aphelion
2.298902 AU
Inclination
10.43°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
83.05°

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
2064-Apr-07 05:17 0.199482 AU
29842014 km
18.11 km/s
2065-Oct-25 19:26 0.189051 AU
28281589 km
13.70 km/s

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

Physical Parameters

Diameter
0.382 km
Albedo
0.048
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
20.83

Orbit Quality

RMS
0.52224
Condition
0
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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