Astrophysics (index)about

Asteroid

(minor planet without comet characteristics)

The term Asteroid is used for Minor Planets in the Asteroid Belt, out to Jupiter's orbit. It is sometimes used more generally: it is often used to include minor planets closer to the Sun, such as those that are Near-Earth Objects, and sometimes used to include Centaurs, i.e., minor planets further out.

The first discovered asteroids were Ceres and Pallas in 1801, with the 15th discovered in 1851, and were termed asteroids which means star-like since they appeared as points (but moved like Planets). Now 100,000 have been identified, many by computer, and the estimated population is millions.

A diameter of 10 meters is often (but not always) used as the threshold between asteroid and Meteoroid. Ceres, the largest in the asteroid belt, is near 1,000 km in diameter, the next largest with less than 600 km. Asteroids are generally classified by type of orbit and by spectrum.


(minor planets,solar system,object type)
http://en.wikipedia.org/wiki/Asteroid

Referenced by:
Asteroid Belt
Asteroid Family
Axisymmetric
101955 Bennu
Binary Minor Planet (BMP)
Chondrite
Circumstellar Disk
Corotation Resonance (CR)
Catalina Sky Survey (CSS)
Galileo
Kilometer Size Barrier
Kirkwood Gap
Kozai Mechanism
Kuiper Belt (K Belt)
Lagrangian Point
Late Heavy Bombardment (LHB)
LINEAR
LONEOS
Mass Extinction
Mass Spectrometer
Maxwell-Boltzmann Distribution
Meteoroid
Minor Planet
Moon Formation
Minor Planet Center (MPC)
Near-Earth Object (NEO)
Nearby Supernova Factory (NSNF)
Occultation Observations
Orbital Resonance
OSIRIS-REx
Planetary Embryo
Planetesimal
Planetoid
Protoplanet
Psyche
Palomar Transient Factory (PTF)
Regolith
Solar System
SPACEWATCH
SSSB
Titius-Bode Law
Wide-Field Infrared Survey Explorer (WISE)
Yarkovsky Effect
Yarkovsky-O'Keefe-Radzievskii-Paddack Effect

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