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C7

NGC 2403

은하 우수 (73/100)

Barred Spiral

C7 Galaxy Camelopardalis 관측 가능 난이도 5 Expert level - Dark skies recommended
Credit: Image Data - Subaru Telescope (NAOJ), Hubble Legacy Archive; Processing - Robert Gendler. License: CC BY 4.0. (Wikimedia Commons)
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특성

등급 8.4
각크기 19.9′ × 10.1′
위치각 126°
거리 11000000 ly
은하 유형 Barred Spiral (SABc)
Spiral Galaxy [Distance: 11000000 ly]

위치 & 식별자

RA 07h 36m 51.4s
Dec +65° 35' 60.0"
별자리 Camelopardalis
카탈로그 C7

가시성

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서베이 이미지

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C7 소개

설명

NGC 2403 is a bright spiral galaxy in Camelopardalis, about 8 million light-years away. It is a member of the M81 group and resembles a smaller version of M33, with prominent HII regions and well-defined spiral arms.

관측 팁

One of the brightest galaxies outside the Messier catalog, visible in binoculars from dark sites as a faint smudge. A 6-inch telescope shows an elongated glow with a brighter core. Larger scopes reveal hints of spiral structure. Best in winter and spring evenings.

역사

Discovered by William Herschel on November 1, 1788. In 1954, Allan Sandage used Cepheid variable stars in NGC 2403 to refine the extragalactic distance scale.

재미있는 사실

NGC 2403 has produced two observed supernovae: SN 1954J and SN 2004dj. Its giant HII regions rival the Tarantula Nebula in luminosity.

커뮤니티 사진 (1)

Credit: Image Data - Subaru Telescope (NAOJ), Hubble Legacy Archive; Processing - Robert Gendler. License: CC BY 4.0. (Wikimedia Commons)

Credit: Image Data - Subaru Telescope (NAOJ), Hubble Legacy Archive; Processing - Robert Gendler. License: CC BY 4.0. (Wikimedia Commons)

Skybred Mar 2, 2026