2003 CP20
| Discovery
|
| Discoverer
| M. Blythe, F. Shelly,
M. Bezpalko, R. Huber,
L. Manguso, S. Adams,
D. Torres, T. Brothers,
S. Partridge / LINEAR
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| Discovery Date
| February 11, 2003
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| Alternate Designations
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| Category
| Aten, Apohele
Venus-crosser
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Orbital Elements
Epoch October 22, 2004 (JD 2453300.5)
|
| Eccentricity (e)
| 0.322
|
| Semi-Major Axis (a)
| 110.865 Gm (0.741 AU)
|
| Perihelion (q)
| 75.149 Gm (0.502 AU)
|
| Aphelion (Q)
| 146.580 Gm (0.980 AU)
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| Orbital Period (P)
| 233.023 d (0.64 a)
|
| Mean Orbital Speed
| 33.68 km/s
|
| Inclination (i)
| 25.618°
|
Longitude of the
Ascending Node (Ω)
| 103.952°
|
| Argument of Perihelion (ω)
| 252.914°
|
| Mean Anomaly (M)
| 20.298°
|
| Physical Characteristics
|
| Dimensions
| ~2.0 km
|
| Mass
| 1.0×1012 kg
|
| Density
| 2.0? g/cm³
|
| Surface Gravity
| 0.0003 m/s²
|
| Escape Velocity
| 0.0005 km/s
|
| Rotation Period
| ? d
|
| Spectral Class
| ?
|
| Absolute Magnitude
| 16.43
|
| Albedo
| 0.10
|
| Mean Surface Temperature
| ~445 K
|
Discovered February 11, 2003, by the Lincoln Near-Earth Asteroid Research project's station at Socorro, New Mexico, 2003 CP20 (also written 2003 CP20), was the first asteroid known to have an orbit entirely within that of Earth. Together with 2004 JG6, which has an even smaller orbit, it forms a subclass of Aten asteroids, known as Apoheles. 2003 CP20 takes slightly over 233 days to orbit the Sun. 2003 CP20 is a Venus-crosser asteroid, but does not get as close to the Sun as Mercury. With a diameter of about 2 km, it is the larger of the two known Apoheles and is one of the larger Aten asteroids.
External links
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