|2007 HA was discovered by the LINEAR project at 8am on 16 April 2007, just 26 hours before
passing the Earth at 6.5 Lunar Distances.
Already magnitude +13 at discovery
and moving at 65"/min north, it brightened to 12th magnitude
the same day and reached a speed of 100"/min at closest approach.
It was observed for less than 6 days and was last reported on 21 April
2007 when it had faded to magnitude +18 and had slowed down to a more
sedate speed of 8"/min.
2007 HA takes just 10 months to orbit the Sun and is estimated to be
between 150 - 470 metres in diameter.