Compositional properties of planet-crossing asteroids from astronomical surveys

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Table 1

Mean and standard deviation of the color difference between SDSS and the other samples.

Sample	ɡ-r		ɡ-i		r-i		i-z

	Difference	n	Difference	n	Difference	n	Difference	n
`SDSS`-`SMSS`	0.033 ± 0.106	54283	0.056 ± 0.112	52546	0.013 ± 0.074	59242	0.016 ± 0.091	35 252
`SDSS`-Gaia	0.007 ± 0.076	27158	−0.002 ± 0.079	27 043	−0.010 ± 0.052	28 455	−0.051 ± 0.064	24768
`SDSS`-`Classy`	0.005 ± 0.066	1807	0.029 ± 0.078	1796	0.024 ± 0.033	1843	0.008 ± 0.054	1734

Notes. The number of asteroids in each of the samples is also reported. We limit the SDSS sample to asteroids with uncertainties below 0.1 mag.

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