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Table 2.

General parameters of NGC 6284.

Parameter Estimated value
Centre of gravity αJ2000 = 17h 04m 28.6s
δJ2000 = −24°  45′ 53.31″
Age t = 13.3 ± 0.4 Gyr
Metallicity [Fe/H] = −1.36 ± 0.01
Distance modulus (m − M)0 = 15.61 ± 0.04
Reddening E(B − V) = 0.32 ± 0.01
Central relaxation time log(trc/yr) = 6.72
Half-mass relaxation time log(trh/yr) = 9.06

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