SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 GP65

2011 GP65

2011 GP65 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.36 AU it takes 3.63 yr to circle the Sun.

Apollo Observations: 52
Orbital Period · P
3.63 yr
v(q)
41.7 km/s
v(Q)
9 km/s
Diameter · ≈
0.25 km
TJ
3.21
Eccentricity · e
0.6449

Orbit and dynamics

Between its closest point (0.838 AU) and its farthest (3.882 AU), the heliocentric distance changes by 3.044 AU over every revolution.

One full revolution takes 3.63 yr (1,324 days), computed from the semi-major axis of 2.36 AU.

The high eccentricity (0.645) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 11.65° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 41.7 km/s at perihelion and falls to 9 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 = 20.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.25 km.

Observation record and orbit quality

Astrometry from 52 individual observations underpins this orbit; the fit leaves an RMS residual of 0.402 arcseconds.

Condition code U = 5 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
2.36 AU
Eccentricity
0.6449
Perihelion
0.838 AU
Aphelion
3.881964 AU
Inclination
11.65°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
44.51°

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-Sep-24 10:56 0.222306 AU
33256501 km
22.09 km/s
2040-Jun-27 14:40 0.243755 AU
36465260 km
11.91 km/s
2051-May-04 05:38 0.153268 AU
22928616 km
18.53 km/s
2069-Sep-26 01:40 0.220864 AU
33040722 km
22.73 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
20.8

Orbit Quality

RMS
0.40197
Condition
5
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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