这个发射星云在南天星座天坛座另一个巨大的暗分子云的边缘被发现，离我们约4000光年。
The emission nebula is found near the edge of an otherwise dark large molecular cloud in the southern constellation Ara, about 4, 000 light-years away.
天坛(星)座：南半球靠近矩尺座及望远镜座的一个星座。
ARA: a constellation in the Southern Hemisphere near the constellations Norma and Telescopium.
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