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Frequently used numbers

1 milli-arcsecond = 4.848e-9 rad

1 pc = 2.02e9 AE = 3.09e16 m

1 M_Sun = 1.99e30 kg

1 M_Jupiter = 6.0e24 kg

1 Jy = 1e-26 W/(m^2 Hz) = 1e-23 erg/(s cm^2 Hz)

1 L_sun = 3.8e26 W

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