SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 CY46

2011 CY46

2011 CY46 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.151 AU it takes 3.15 yr to circle the Sun.

Apollo Observations: 219
Orbital Period · P
3.15 yr
v(q)
41.3 km/s
v(Q)
10 km/s
Diameter · ≈
0.37 km
TJ
3.42
Eccentricity · e
0.6106

Orbit and dynamics

Between its closest point (0.837 AU) and its farthest (3.464 AU), the heliocentric distance changes by 2.627 AU over every revolution.

One full revolution takes 3.15 yr (1,152 days), computed from the semi-major axis of 2.151 AU.

The high eccentricity (0.611) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 11.54° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 41.3 km/s at perihelion and falls to 10 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 = 19.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.37 km.

Observation record and orbit quality

Astrometry from 219 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3475 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
2.151 AU
Eccentricity
0.6106
Perihelion
0.837 AU
Aphelion
3.464401 AU
Inclination
11.54°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
287.89°

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
2033-May-21 21:57 0.222976 AU
33356739 km
12.88 km/s
2052-Feb-27 16:15 0.308383 AU
46133488 km
24.17 km/s
2055-Jun-30 06:35 0.215537 AU
32243887 km
12.38 km/s
2074-Mar-11 12:22 0.131081 AU
19609486 km
18.75 km/s
2077-Jul-27 09:02 0.254067 AU
38007872 km
19.14 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
19.9

Orbit Quality

RMS
0.34752
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

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