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Table 3

Main geometrical and physical parameters of MB.

Parameter Value

Semi-major axis (′)  ~9
Semi-minor axis (′)  ~4.5
Semi-major axis (pc)  ~13
ΔVMB (km s-1)  ~6
Vexp (km s-1)  ~5
Vsyst (km s-1)  −51
Mtot (104M) 3.4  ±  1.3
Ekin (1048 erg)  ~9
P (10 4M km s-1)  ~1.7

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