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247 Eukrate. Eukrate ( minor planet designation: 247 Eukrate) is a rather large main-belt asteroid. It is dark and probably a primitive carbonaceous body. The asteroid was discovered by Robert Luther on March 14, 1885, in Düsseldorf. It was named after Eucrate, a Nereid in Greek mythology . In 2001, the asteroid was detected by radar from the ...
Outside the top four, the ranking of all the asteroids is uncertain, as there is a great deal of overlap among the estimates. The largest asteroids with an accurately measured mass, because they have been studied by the probe Dawn, are 1 Ceres with a mass of (939.3 ± 0.5) × 10 18 kg, and 4 Vesta at (259.076 ± 0.001) × 10 18 kg.
List of minor planets visited by spacecraft[edit] A total of 18 minor planets ( asteroids, dwarf planets, and Kuiper belt objects) have been visited by space probes. Moons (not directly orbiting the Sun) and planets are not minor planets and thus are not included in the table below. Flyby; first asteroid visited by a spacecraft.
Called 2024 MK, the space rock will make its closest approach to Earth Saturday morning, passing by at about three-quarters the distance from Earth to the moon. A 7,579-foot (2,310-meter) asteroid ...
Apollo asteroid, Venus-crosser asteroid, Mars-crosser asteroid. Near-Earth asteroids in Main Asteroid Belt. 2201 Oljato. 2.172. Apollo asteroid, Venus-crosser asteroid, Mars-crosser asteroid. 4486 Mithra. 2.204.
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 (a > 1 AU) but perihelion distances less than the Earth's aphelion distance (q < 1.017 AU). [1] [2]
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A minor planet is " lost " when today's observers cannot find it, because its location is too uncertain to target observations. This happens if the orbital elements of a minor planet are not known accurately enough, typically because the observation arc for the object is too short, or too few observations were made before the object became ...