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C21

NGC 4449

은하 우수 (61/100)

Irregular

C21 Galaxy Canes Venatici 관측 가능 난이도 3 Medium telescope (6-8") - Dark skies recommended
Credit: NASA, ESA, A. Aloisi (STScI/ESA), and The Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration. License: Public domain. (Wikimedia Commons)
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특성

등급 9.4
각크기 4.7′ × 2.7′
위치각 51°
거리 10000000 ly
은하 유형 Irregular (IB)
Irregular Galaxy [Distance: 10000000 ly]

위치 & 식별자

RA 12h 28m 11.0s
Dec +44° 05' 34.8"
별자리 Canes Venatici
카탈로그 C21

가시성

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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)

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