C7
NGC 2403
천체 데이터
- 카탈로그 지정명
- C7
- 유형
- Galaxy
- 별자리
- Camelopardalis
- 등급
- 8.4
- 적경
- 07h 36m 51.4s
- 적위
- +65° 35' 60.0"
- 거리
- 11,000,000 광년
- 각크기
- 26
서베이 이미지
서베이 이미지 로드 중…
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)
Skybred Mar 2, 2026