C21
NGC 4449
천체 데이터
- 카탈로그 지정명
- C21
- 유형
- Galaxy
- 별자리
- Canes Venatici
- 등급
- 9.4
- 적경
- 12h 28m 11.0s
- 적위
- +44° 05' 34.8"
- 거리
- 10,000,000 광년
- 각크기
- 6
서베이 이미지
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C21 소개
설명
NGC 4449 is an irregular dwarf galaxy in Canes Venatici, about 12 million light-years away. It is undergoing a galaxy-wide starburst, producing new stars at a prodigious rate throughout its entire body rather than just in a central region.
관측 팁
Visible as a small, rectangular glow in a 4-inch telescope. Higher magnification reveals a mottled texture from the numerous HII regions. Best observed in spring evenings when Canes Venatici is high.
역사
Discovered by William Herschel on April 27, 1788. It is considered a Magellanic-type irregular galaxy similar in many ways to the Large Magellanic Cloud.
재미있는 사실
NGC 4449 is one of the best-studied starburst dwarf galaxies. It is currently consuming a smaller companion galaxy, making it one of the few cases where dwarf galaxy cannibalism has been directly observed.
커뮤니티 사진 (1)
Credit: NASA, ESA, A. Aloisi (STScI/ESA), and The Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration. License: Public domain. (Wikimedia Commons)
Skybred Mar 2, 2026