Table 2: The fundamental parameters of M4.
Parameter Value Ref.
($\alpha$, $\delta$) $_{\rm J2000.0}$ $(16^{\rm h}23^{\rm m}35.5^{\rm s}, -26^{\circ}31' 31'')$ 1
($\ell$, b) $_{\rm J2000.0}$ ( $350\hbox{$.\!\!^\circ$ }97$, $15\hbox{$.\!\!^\circ$ }97$) 1
distance 1.7 kpc 2
core radius $r_{\rm c}$ 0.53 pc 3
half mass radius $r_{\rm h}$ 2.3 pc 3
tidal radius 21 pc 3
$\rm [Fe/H]$ -1.07 4
Present-day Total Mass 63 000 $M_\odot$ 5
Age 12 Gyr 6
Radial velocity 70.29 km s-1 7
1 Djorgovski & Meylan (1993); 2 Peterson et al. (1995); 3 Trager et al. (1993); 4 Marino et al. (2008); 5 Richer et al. (2004); 6 Hansen et al. (2004); 7 this work.


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