Information: - Spacewatch is a project at the University of Arizona led by Robert S. McMillan that specializes in the study of minor planets, including various types of asteroids and comets. It was founded in 1980 by Tom Gehrels and McMillan. - Asteroids are minor planets, especially those of the inner Solar System. The larger ones have also been called planetoids. These terms have historically been applied to any astronomical object orbiting the Sun that did not show the disc of a planet and was not observed to have the characteristics of an active comet. As minor planets in the outer Solar System were discovered and found to have volatile-based surfaces that resemble those of comets, they were often distinguished from asteroids of the asteroid belt. In this article, the term "asteroid" refers to the minor planets of the inner Solar System including those co-orbital with Jupiter. - The Moon is an astronomical body that orbits planet Earth, being Earth's only permanent natural satellite. It is the fifth-largest natural satellite in the Solar System, and the largest among planetary satellites relative to the size of the planet that it orbits (its primary). Following Jupiter's satellite Io, the Moon is second-densest satellite among those whose densities are known. - 65803 Didymos ( 1996 GT ) is an Apollo asteroid discovered on April 11 , 1996 by Joe Montani at Spacewatch at Kitt Peak . It has a moon , whence the appellation '' Didymos '' , meaning '' twin '' . The primary is about 800 m in diameter and the moon 150 m in diameter . The moon is in an orbit about 1.1 km from the primary and with an orbital period of 11.9 hours . Didymos is the most easily reachable asteroid its size from Earth , requiring a delta - v of only 5.1 km / s for a spacecraft to rendezvous , compared to 6.0 km / s to reach the Moon . It is the target of the proposed AIDA spacecraft , an unmanned mission that would test the possibility of changing an asteroid 's orbit via impacting its surface . - The Apollo asteroids are a group of near-Earth asteroids named after 1862 Apollo, discovered by German astronomer Karl Reinmuth in the 1930s. They are Earth crossing asteroids that have an orbital semi-major axis greater than that of the Earth (> 1 AU) but perihelion distances less than the Earth's aphelion distance (q < 1.017 AU). - A planet is an astronomical body orbiting a star or stellar remnant that The term "planet" is ancient, with ties to history, astrology, science, mythology, and religion. Several planets in the Solar System can be seen with the naked eye. These were regarded by many early cultures as divine, or as emissaries of deities. As scientific knowledge advanced, human perception of the planets changed, incorporating a number of disparate objects. In 2006, the International Astronomical Union (IAU) officially adopted a resolution defining planets within the Solar System. This definition is controversial because it excludes many objects of planetary mass based on where or what they orbit. Although eight of the planetary bodies discovered before 1950 remain "planets" under the modern definition, some celestial bodies, such as Ceres, Pallas, Juno and Vesta (each an object in the solar asteroid belt), and Pluto (the first trans-Neptunian object discovered), that were once considered planets by the scientific community, are no longer viewed as such. What is the relationship between '65803 didymos' and 'apollo asteroids'?
Answer:
minor planet group