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Table 2

Apophis’ physical parameters.

Parameter Value Reference

H: absolute magnitude 19.7 ± 0.4 Delbò et al. (2007)
G: magnitude slope 0.325 Delbò et al. (2007)
p: geometric albedo 0.23 ESA (2013)
Rotation period 30.4 h Behrend (2005)
Spectral type Sq Binzel et al. (2009)
Diameter 325 ± 15 m ESA (2013)

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