SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 CN2

2011 CN2

2011 CN2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.236 AU it takes 3.34 yr to circle the Sun.

Apollo Observations: 91
Orbital Period · P
3.34 yr
v(q)
41.1 km/s
v(Q)
9.7 km/s
Diameter · ≈
0.63 km
TJ
3.3
Eccentricity · e
0.6195

Orbit and dynamics

Between its closest point (0.851 AU) and its farthest (3.621 AU), the heliocentric distance changes by 2.77 AU over every revolution.

One full revolution takes 3.34 yr (1,221 days), computed from the semi-major axis of 2.236 AU.

The high eccentricity (0.62) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 19.61° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 41.1 km/s at perihelion and falls to 9.7 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 = 18.74 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.63 km.

Observation record and orbit quality

Astrometry from 91 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6402 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
2.236 AU
Eccentricity
0.6195
Perihelion
0.851 AU
Aphelion
3.621202 AU
Inclination
19.61°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
264.9°

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
2030-Jul-21 19:05 0.267368 AU
39997689 km
23.88 km/s
2040-Jul-31 22:09 0.082106 AU
12282948 km
18.99 km/s
2050-Aug-12 01:40 0.106090 AU
15870872 km
15.42 km/s
2060-Sep-10 01:35 0.285439 AU
42701123 km
12.73 km/s
2070-Nov-27 22:04 0.325343 AU
48670574 km
11.07 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
18.74

Orbit Quality

RMS
0.64019
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.