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. The word linear comes from the Latin word linearis, which means created by lines. ... February 11 is the 42nd day of the year in the Gregorian Calendar. ... 2003 is a common year starting on Wednesday of the Gregorian calendar. ... The provisional designation of comets and asteroids are similar to each other: they both follow a pattern set in 1925 by the Minor Planet Center of the IAU. Historical designations At first, astronomers strove to assign symbols to the minor planets: 1 Ceres a stylized sickle 2 Pallas a lozenge... Minor planets, or planetoids are minor bodies of the solar system orbiting the sun that are larger than meteoroids (the largest of which might be taken to be around 10 meters or so across) but smaller than major planets (Mercury having a diameter of about 4880 km). ... The Aten asteroids are a group of near-Earth asteroids, named after the first of the group to be discovered (2062 Aten, discovered January 7, 1976 by Eleanor F. Helin). ... Apohele asteroids are a subclass of Aten asteroids. ... A Venus-crosser asteroid is an asteroid whose orbit crosses that of Venus. ... In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... October 22 is the 295th day of the year (296th in leap years) in the Gregorian Calendar, with 70 days remaining. ... 2004 is a leap year starting on Thursday of the Gregorian calendar. ... The Julian day or Julian day number (JDN) is the number of SI days that have elapsed since 12 noon Greenwich Mean Time (UT or TT) on Monday, January 1, 4713 BC in the proleptic Julian calendar 1. ... (This page refers to eccitricity in astrodynamics. ... In geometry, the semi-major axis (also semimajor axis) a applies to ellipses and hyperbolas. ... Giga (symbol: G) is a prefix in the SI system of units denoting 109, or 1 000 000 000. ... The metre is the basic unit of length in the International System of Units (SI: Système International dUnités). ... The astronomical unit (AU or au or a. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... The orbital period is the time it takes a planet (or another object) to make one full orbit. ... A day is any of several different units of time. ... A Julian year is the length of an average year in the Julian calendar, 365. ... The orbital speed of a body, generally a planet, a natural satellite, an artificial satellite, or a multiple star, is the speed at which it orbits around the barycenter of a system, usually around a more massive body. ... The second (symbol s) is a unit for time, and one of seven SI base units. ... Inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit and is the angular distance of the orbital plane from the plane of the reference (usually planets equator or the ecliptic), stated in degrees. ... A degree (or in full a degree of arc), usually symbolized °, is a measurement of plane angle, representing 1/360 of a full rotation. ... The Longitude of the ascending node () is one of the orbital elements used to specify the orbit of an object in space. ... The argument of the perihelion is one of the orbital elements describing the orbit of a planet. ... In the study of orbital dynamics the mean anomaly is a measure of time, specific to the orbiting body p, which is a multiple of 2π radians at and only at periapsis. ... Mass is a property of physical objects that, roughly speaking, measures the amount of matter they contain. ... The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... A cubic centimetre (cm3) is an SI derived unit of volume, equal to the volume of a cube with side length of 1 centi metre. ... It has been suggested that Law of universal gravitation be merged into this article or section. ... In physics, for a given gravitational field and a given position, the escape velocity is the minimum speed an object without propulsion, at that position, needs to have to move away indefinitely from the source of the field, as opposed to falling back or staying in an orbit within a... In astronomy, a rotation period is the time an astronomical object takes to complete one revolution around its rotation axis. ... An asteroid is a small, solid object in our Solar System, orbiting the Sun. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standardized distance away. ... The albedo is a measure of reflectivity of a surface or body. ... Temperature is the physical property of a system which underlies the common notions of hot and cold; the material with the higher temperature is said to be hotter. ... The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ... February 11 is the 42nd day of the year in the Gregorian Calendar. ... 2003 is a common year starting on Wednesday of the Gregorian calendar. ... The Lincoln Near-Earth Asteroid Research (LINEAR) project is a cooperative project between the United States Air Force, NASA and MITs Lincoln Laboratory for the systematic discovery of near-Earth asteroids. ... Socorro is a Spanish word that means aid, by providing help or relief. ... State nickname: Land of Enchantment Other U.S. States Capital Santa Fe Largest city Albuquerque Governor Bill Richardson Official languages English and Spanish Area 315,194 km² (5th)  - Land 314,590 km²  - Water 607 km² (0. ... In ancient times, only the Sun and Moon, a few hundred stars and the most easily visible planets had names. ... An asteroid is a small, solid object in our Solar System, orbiting the Sun. ... In physics, an orbit is the path that an object makes, around another object, whilst under the influence of a source of centripetal force, such as gravity. ... Earth, also known as the Earth, Terra, and (mostly in the 19th century) Tellus, is the third planet outward from the Sun. ... 2004 JG6 (also written 2004 JG6) is an unusual asteroid. ... The Aten asteroids are a group of near-Earth asteroids, named after the first of the group to be discovered (2062 Aten, discovered January 7, 1976 by Eleanor F. Helin). ... Apohele asteroids are a subclass of Aten asteroids. ... The Sun is the star at the centre of our Solar system. ... A Venus-crosser asteroid is an asteroid whose orbit crosses that of Venus. ... The Sun is the star at the centre of our Solar system. ... Atmospheric characteristics Atmospheric pressure trace Potassium 31. ...

External links

• Discovery Circumstances
• Orbital Information
• Photo