Collinder 135 and UBC 7: A physical pair of open clusters

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Table 1.

Main cluster parameters evaluated for the most reliable members.

Cluster	N	Mass, M_⊙	N_c	l, deg	b, deg	ϖ, mas	μ_l, mas yr⁻¹	μ_b, mas yr⁻¹	N_{V_r}	V_r, km s⁻¹
Cr 135	244	126	91	248.98 ± 0.06	−11.10 ± 0.05	3.31 ± 0.02	−9.92 ± 0.05	−6.47 ±0.06	30	17.4 ± 1.3
UBC 7	184	87	80	248.62 ± 0.04	−13.37 ± 0.05	3.56 ± 0.02	−10.25 ± 0.05	−5.98 ± 0.05	24	16.7 ± 1.5

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