View Full Version : News Flash: Asteroid Flying Past Earth Today Has Mini-Moon!

2015-Jan-26, 11:40 PM
Wonderful news! Asteroid 2004 BL86, which passed closest to Earth today at a distance of 750,000 miles (1.2 million km), has a companion moon. Scientists working with NASA’s 230-foot-wide (70-meter) Deep Space Network antenna at Goldstone, California, have released the first radar images of the asteroid which show the tiny object in orbit about the […]

More... (http://www.universetoday.com/118505/news-flash-asteroid-flying-past-earth-today-has-mini-moon/)

2015-Jan-28, 12:16 AM
I'm surprised at how round BL86 is. At 340 metres diameter, gravity's not going to have a lot to do with its shape.
So something else is acting, or it's a total rubble pile?