I still vote for alien ship.

Clip of article below

Earth has become littered with billions of pieces of space junk, since the former Soviet Union launched Sputnik One 53 years ago. These range in size from minute paint flecks to hefty satellites.

However, a spokesman from Nasa said: ‘The object’s orbit reaches the orbit of Venus at its closest point to the Sun and nearly out to the orbit of Mars at its furthest point.

‘It crosses the Earth’s orbit at a very steep angle and this means it is unlikely to be a rocket stage.’

The space agency spokesman added that the trajectory would not fit with any recent rocket launch.

‘It seems more likely that this is a near-Earth asteroid about 10-15 metres across,’ he concluded.

The rock has now been labeled 2010 AL30. There are two million such objects streaking around near-Earth space, with one passing near our world about once a week.

Read more: http://www.dailymail.co.uk/sciencetech/article-1242914/What-Earth-Mystery-object-whizzes-past-planet.html?ITO=1490#ixzz0cWQaIfGQ