论文信息 - Solar System Small Bodies

Solar System Small Bodies

Number of minor planets having well-determined orbits, cataloged by permanent designations (numbers) as of 1998, January 1: 8125. Number of known minor planets having less well-determined orbits, cataloged by provisional designations: > 25, 000. Most are located in the Main-belt, between Mars and Jupiter. Semimajor axis, range 2.06 to 3.28 AU, mean a = 2.68. Mean orbital eccentricity: e = 0.142. Mean orbital inclination: i = 7.92 deg. Mean orbital period: 4.40 yr. Number of main-belt asteroids larger than 100 km in diameter: 188, 50 km: 475. Estimated population of main-belt asteroids larger than diameter D (in km):

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