Blinking Planetary
NGC 6826
천체 데이터
- 카탈로그 지정명
- C15
- 유형
- PlanetaryNebula
- 별자리
- Cygnus
- 등급
- 8.8
- 적경
- 19h 44m 48.0s
- 적위
- +50° 31' 30.0"
- 거리
- 2,200 광년
- 각크기
- 0.5
서베이 이미지
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Blinking Planetary 소개
설명
The Blinking Planetary (NGC 6826) is a planetary nebula in Cygnus, about 2,200 light-years away. It gets its name from a remarkable visual effect: when you stare directly at it, the bright central star dominates and the nebula seems to vanish, but with averted vision the nebula reappears.
관측 팁
Easy to find in Cygnus. In a 4-inch telescope at medium power, try alternating between direct and averted vision to see the "blinking" effect. The nebula is about 25 arcseconds across with a bright central star. Best in summer and autumn.
역사
Discovered by William Herschel on September 6, 1793. The blinking effect was noted by observers and gives this planetary nebula one of the most descriptive common names in astronomy.
재미있는 사실
Hubble images revealed two red FLIER (Fast Low-Ionization Emission Region) structures on opposite sides of the nebula, jets of material moving at supersonic speeds away from the central star.
커뮤니티 사진 (1)
Credit: Bruce Balick (University of Washington), Jason Alexander (University of Washington), Arsen Hajian (U.S. Naval Observatory), Yervant Terzian (Cornell University), Mario Perinotto (University of Florenc.... License: Public domain. (Wikimedia Commons)
Skybred Mar 2, 2026