Cave Nebula
NGC 3626
천체 데이터
- 카탈로그 지정명
- C9
- 유형
- EmissionNebula
- 별자리
- Cepheus
- 등급
- 7.7
- 적경
- 22h 57m 42.0s
- 적위
- +62° 37' 01.2"
- 거리
- 2,800 광년
- 각크기
- 50
서베이 이미지
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Cave Nebula 소개
설명
The Cave Nebula (Sh2-155) is an emission nebula and dim HII region in Cepheus, about 2,400 light-years away. It lies at the edge of the Cepheus B molecular cloud and contains active star formation.
관측 팁
A challenging visual target requiring dark skies and at least an 8-inch telescope. An OIII or UHC nebula filter is essential. The nebula appears as a faint, irregular glow with a dark intrusion. Best observed in autumn evenings when Cepheus is near the zenith.
역사
Cataloged by Stewart Sharpless in his 1959 catalog of HII regions as Sh2-155. The name "Cave Nebula" comes from the dark lane that appears to cut into the bright emission region.
재미있는 사실
The Cave Nebula sits at the boundary between a hot ionized bubble blown by massive stars and a dense molecular cloud. This interface triggers new star formation.
커뮤니티 사진 (1)
Credit: Hewholooks. License: CC BY-SA 3.0. (Wikimedia Commons)
Skybred Mar 2, 2026