AstroGuard -- hazardous Comet/Asteroid news & information
Description: Asteroids near Earth: animation, details, links.
earth (1561) astronomy (1126) moon (691) comets (70) meteorites (68) asteroids (57) meteors (24) observatories (13) astrodynamics (8) impact risks (1)
If this animated Skychart seems too cluttered to you, try using the check boxes to turn off Stars, or maybe Trails or Constellations. In most Web browsers you can use keyboard command [Ctrl]+ to enlarge the view, [Ctrl]- to shrink it, and [Ctrl]0 to return to default zoom. For a rather different view, try hitting [Sky].
Legend - object IDs
1. Ten lunar distances: One "lunar distance" (LD) is the average distance between Earth and Moon (about 384,400 km., the same as 238,855 miles or 9.59 times around Earth's equator). Ten lunar distances has no special astronomical importance but is a useful giant traveling "bubble" within which to organize this special reporting. The approach of a small Solar-System body becomes more interesting when it comes closer than 2.41 LD, as it encounters our planet's gravitational sphere of influence ( SOI ). Eart
AstroGuard -- hazardous Comet/Asteroid news & information