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C56

NGC 246

Nebulosa Planetária Excelente (69/100)
C56 PlanetaryNebula Cetus Visível Nível 4 Large telescope (10"+) - Benefits from OIII filter
Credit: Unknown. License: Public domain. (Wikimedia Commons)
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Propriedades

Magnitude 10.9
Tamanho Angular 4.1′
Distância 1600 ly
Planetary Nebula [Distance: 1600 ly]

Posição e Identificadores

RA 00h 47m 44.9s
Dec -11° 52' 44.4"
Constelação Cetus
Catálogo C56

Visibilidade

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Imagem de Levantamento

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Sobre C56

Descrição

NGC 246 is a planetary nebula in Cetus, about 1,600 light-years away. Known as the Skull Nebula, it has a large, ghostly shell about 4 arcminutes across with a distinctly mottled, uneven surface that gives it a skull-like appearance.

Dicas de Observação

A large but faint planetary nebula. An 8-inch telescope with an OIII filter shows the round, uneven glow. The 12th-magnitude central star is a hot white dwarf in a binary system. Best in autumn evenings.

História

Discovered by William Herschel on November 27, 1785. The central star is actually a close binary system, which may influence the nebula's complex internal structure.

Curiosidades

NGC 246 is one of the nearest planetary nebulae to Earth and one of the largest in angular size. Its central star is one of the hottest white dwarfs known, at about 150,000 K.

Fotos da Comunidade (1)

Credit: Unknown. License: Public domain. (Wikimedia Commons)

Credit: Unknown. License: Public domain. (Wikimedia Commons)

Skybred Mar 2, 2026