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C56

NGC 246

행성상 성운 우수 (69/100)
C56 PlanetaryNebula Cetus 관측 가능 난이도 4 Large telescope (10"+) - Benefits from OIII filter
Credit: Unknown. License: Public domain. (Wikimedia Commons)
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특성

등급 10.9
각크기 4.1′
거리 1600 ly
Planetary Nebula [Distance: 1600 ly]

위치 & 식별자

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

가시성

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C56 소개

설명

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.

관측 팁

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.

역사

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.

재미있는 사실

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.

커뮤니티 사진 (1)

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

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

Skybred Mar 2, 2026