'Cometa do século' fica visível em todo o Brasil; saiba como observar fenômeno

Apelidado de "Cometa do Século", o cometa C/2023 A3 (Tsuchinschan-ATLAS) atinge seu “periélio” nesta sexta (27), ficando visível no Brasil. Entenda a seguir o que significa e como observá-lo.

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Na astronomia, o periélio é o momento em que um corpo, seja planeta, asteroide ou cometa, está no ponto mais próximo do Sol.

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O cometa deve continuar visível até meados de outubro, com variações em seu brilho. Durante esse período, ele estará mais alto no céu, mas com uma luminosidade reduzida.

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Embora já esteja visível a olho nu, pode ser um desafio, pois está muito próximo do Sol, o que ofusca sua luminosidade.

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Para uma observação eficaz, os astrônomos recomendam o uso de binóculos ou telescópios, especialmente em áreas livres de poluição luminosa e com o horizonte leste desobstruído.

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Até 7 de outubro deve aparecer no leste, antes do nascer do sol. Entre 7 e 11 de outubro, devido à proximidade do Sol, será difícil de visualizar. A partir de 12 de outubro será visível no oeste perto do horizonte logo após o pôr do sol.

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Além disso, aplicativos como Star Walk 2 ou Sky Tonight são úteis, ajudando a localizar o cometa no céu.

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O apelido de “Cometa do Século” vem da expectativa de que atinja uma magnitude de brilho semelhante ao do cometa Hale-Bopp.

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O cometa é composto de poeira e gelo, e há incertezas sobre sua trajetória e estrutura, com a possibilidade de fragmentação devido à proximidade com o Sol.

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Ele já foi registrado em várias partes do Brasil, como montanhas de Nova Lima, em Minas Gerais.

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