SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 CK50

2011 CK50

2011 CK50 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.877 AU and a period of 0.82 yr.

Aten Observations: 43
Orbital Period · P
0.82 yr
v(q)
44.4 km/s
v(Q)
22.8 km/s
Diameter · ≈
0.05 km
TJ
6.71
Eccentricity · e
0.3225

Orbit and dynamics

Between its closest point (0.594 AU) and its farthest (1.16 AU), the heliocentric distance changes by 0.566 AU over every revolution.

One full revolution takes 0.82 yr (300 days), computed from the semi-major axis of 0.877 AU.

An eccentricity of 0.323 makes the orbit moderately elongated.

Its inclination of 4.12° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 44.4 km/s at perihelion and falls to 22.8 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 = 24.12 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

Astrometry from 43 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5702 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
0.877 AU
Eccentricity
0.3225
Perihelion
0.594 AU
Aphelion
1.159833 AU
Inclination
4.12°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
83.21°

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
2028-Dec-19 22:52 0.101483 AU
15181577 km
7.37 km/s
2034-Mar-06 17:39 0.115341 AU
17254825 km
7.24 km/s
2037-Dec-12 22:34 0.130694 AU
19551479 km
13.00 km/s
2043-Jan-25 21:51 0.174479 AU
26101628 km
7.68 km/s
2048-Mar-18 09:05 0.088093 AU
13178511 km
11.55 km/s
2051-Dec-20 04:09 0.099833 AU
14934822 km
7.37 km/s
2057-Mar-10 16:47 0.097099 AU
14525817 km
7.41 km/s
2060-Dec-11 11:49 0.080180 AU
11994761 km
11.02 km/s
2066-Feb-14 03:28 0.161154 AU
24108266 km
7.51 km/s
2069-Dec-14 16:02 0.193075 AU
28883626 km
15.10 km/s
2075-Jan-27 13:21 0.172512 AU
25807380 km
7.67 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
24.12

Orbit Quality

RMS
0.5702
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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