SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 RP82

2015 RP82

2015 RP82 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.475 AU it takes 3.89 yr to circle the Sun.

Apollo Observations: 60
Orbital Period · P
3.89 yr
v(q)
38.9 km/s
v(Q)
9.2 km/s
Diameter · ≈
0.43 km
TJ
3.09
Eccentricity · e
0.6177

Orbit and dynamics

Between its closest point (0.946 AU) and its farthest (4.004 AU), the heliocentric distance changes by 3.058 AU over every revolution.

One full revolution takes 3.89 yr (1,422 days), computed from the semi-major axis of 2.475 AU.

The high eccentricity (0.618) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 24.62° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 38.9 km/s at perihelion and falls to 9.2 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

No direct size measurement is available; from an absolute magnitude of H = 19.59 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.43 km.

Observation record and orbit quality

Astrometry from 60 individual observations underpins this orbit; the fit leaves an RMS residual of 0.7015 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
2.475 AU
Eccentricity
0.6177
Perihelion
0.946 AU
Aphelion
4.003808 AU
Inclination
24.62°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
317.73°

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
2046-Jun-07 05:15 0.445845 AU
66697447 km
16.98 km/s
2050-Apr-10 13:59 0.080518 AU
12045271 km
16.36 km/s
2054-Mar-18 03:29 0.326409 AU
48830133 km
23.86 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
19.59

Orbit Quality

RMS
0.70153
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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