(308242) 2005 GO21 is a large near-Earth asteroid and potentially hazardous object. It has a well determined orbit with an observation arc of 7 years and an uncertainty parameter of 0. It was discovered on 1 April 2005 by the Siding Spring Survey at an apparent magnitude of 18.1 using the 0.5-metre (20 in) Uppsala Southern Schmidt Telescope.Based on an absolute magnitude of 16.4 the asteroid has an estimated diameter of 1.6 km (within a factor of two).
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apoapsis (km)
1.51019e+11
orbital period (μ)
2.05124e+07
periapsis (km)
7.43741e+10
absolute magnitude
16.4
discovery date
2005-04-01
discoverer
Siding Spring Survey, Uppsala Southern Schmidt Telescope
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