Omicron Velorum Cluster
IC 2391
Dados do Objeto
- Designação do Catálogo
- C85
- Tipo
- OpenCluster
- Constelação
- Vela
- Magnitude
- 2.5
- Ascensão Reta
- 08h 40m 16.6s
- Declinação
- -53° 03' 32.4"
- Distância
- 574 anos-luz
- Tamanho Angular
- 50
Imagem de Levantamento
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Sobre Omicron Velorum Cluster
Descrição
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.
Dicas de Observação
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.
História
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.
Curiosidades
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.
Fotos da Comunidade (1)
Credit: YayLol123. License: CC BY-SA 4.0. (Wikimedia Commons)
Skybred Mar 2, 2026