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Table 3

Typical magnitude difference (Δm) and angular separation (Θ) between components of multiple SSO systems.

Population Δm Θ f
(mag) (′′) (%)

NEA and MC 15 ± 5
MBA (D< 10 km) 15 ± 5
MBA (D> 100 km) 3 ± 2
KBO 6 ± 4

Notes. NEA and MCs share similar characteristics, and so do large MBAs and Trojans. We split MBAs into two categories according to the diameter D of the main component. Estimates on the binary frequency in each populations are based on the reviews by Noll et al. (2008) and Margot et al. (2015). We only consider high-inclination KBOs here because the binary fraction in the cold belt is closer to 30% (Fraser et al. 2017).

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