Subclasses of near Earth asteroids
Ardenne type asteroid, one of the subclasses of NEAs, is named after the first discovered member "Ardenne" asteroid (Aten). Their semi principal axes are all less than 1 astronomical unit, within the Earth orbit.
- Chinese name
- Aten asteroid
- Shortest half main shaft
- Earth objects 2004 JG6（
Of all the member celestial bodies, the one with the shortest semi major axis is the inner earth celestial bodies 2004 JG6 (0.635 AU)。 And the other celestial bodies (66391) 1999 KW4, its semi spindle is 0.642 AU Perihelion Up to 0.200 AU at Mercury Within the track. Although the semi principal axis of the former is relatively short, the perihelion can only reach within the orbit of Venus, not beyond the orbit of Mercury like the latter. The Ardennes, who pose the greatest threat to the earth, were discovered in 2004 Asteroid 99942 , the celestial body has a chance to collide in 2036 earth , causing disaster. 
