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Omicron Velorum Cluster

IC 2391

산개성단 최고의 관측 대상 (95/100)
C85 OpenCluster Vela 관측 가능 난이도 1 Naked eye / Binoculars - Wide field preferred
Credit: YayLol123. License: CC BY-SA 4.0. (Wikimedia Commons)
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특성

등급 2.5
각크기 29.1′
거리 574 ly
Open Cluster [Distance: 574 ly]

위치 & 식별자

RA 08h 40m 16.6s
Dec -53° 03' 32.4"
별자리 Vela
카탈로그 C85

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Omicron Velorum Cluster 소개

설명

The Omicron Velorum Cluster (IC 2391) is a bright, nearby open cluster in Vela, about 574 light-years away. At magnitude 2.5, it is easily visible to the naked eye and contains about 30 stars spanning 50 arcminutes, centered on the bright star Omicron Velorum.

관측 팁

A fine naked-eye and binocular cluster. Too spread out for most telescopes — binoculars at 7-10x give the best view. The cluster is dominated by Omicron Velorum (mag 3.6). Best from southern latitudes in late winter and spring.

역사

Known since antiquity as a naked-eye grouping. First cataloged by Nicolas Louis de Lacaille in 1751. It was one of the clusters used to determine the age of nearby stellar associations.

재미있는 사실

At only 50 million years old, IC 2391 is a young cluster whose stars are still settling down. Several of its stars show strong X-ray emission characteristic of magnetically active young stars.

커뮤니티 사진 (1)

Credit: YayLol123. License: CC BY-SA 4.0. (Wikimedia Commons)

Credit: YayLol123. License: CC BY-SA 4.0. (Wikimedia Commons)

Skybred Mar 2, 2026