Answer: First quadruple asteroid
Notes: Astronomers have recently discovered a third moon orbiting the main-belt asteroid (130) Elektra, making it the first ‘Quadruple Asteroid’ ever found. (130) Elektra is a large main-belt asteroid, first discovered in 1873 by Litchfield Observatory astronomers. It has an effective diameter of 199 km. The discovery of first quadruple asteroid system will help in understanding the mechanisms of the formation of these satellites.
