Table 2: Heliocentric distances and galactic coordinates of three representative young open clusters.
Region d l b

(pc) (deg) (deg)

Upper Scorpius 145 350 +20

$\sigma$ Orionis 385 207 -17

Pleiades 130 167 -24

**Table 2:** Heliocentric distances and galactic coordinates of three representative young open clusters.
Region	d	l	b
	(pc)	(deg)	(deg)
Upper Scorpius	145	350	+20
$\sigma$ Orionis	385	207	-17
Pleiades	130	167	-24

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