It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
In astronomy, a lunar distance (LD) is a measurement of the distance from the Earth to the Moon. The average distance from Earth to the Moon is 384,403 kilometers (238,857 miles). The actual distance varies over the course of the orbit of the moon.
What makes 2009 BD unusual is that its orbit is very nearly the same as that of Earth. It is what we’d call a co-orbital asteroid. Literally, the term co-orbital means same orbit. Really, it isn’t the same orbit. 2009 BD has almost the same orbit, but it is close enough that its orbit is still called co-orbital. 2009 BD’s orbit is just a tiny shade larger than Earth’s,
An object of this size, if it had hit Earth, would likely have created an explosion similar in sized to that from an atomic bomb (depending upon composition and speed at impact). Earth gets hit by this sized body every now and then. That it is out there and that it is passing near Earth are not unusual. It is one of a large number of such bodies in the Solar System.