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Table 1

Coordinates of the stars and clusters shown in Fig. 2.

Name (l, b) [deg]

λ Ori 195, –12.0
25 Ori 201, –18.3
ϵ Ori 205.2 –17.2
σ Ori 206.8, –17.3
NGC 1980 209.5, –19.6
NGC 1981 208, –19.0
NGC 1977 208.4, –19.1

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