Fireworks Galaxy
NGC 6946
Object Data
- Catalog Designation
- C12
- Type
- Galaxy
- Constellation
- Cepheus
- Magnitude
- 8.9
- Right Ascension
- 20h 34m 52.3s
- Declination
- +60° 09' 14.4"
- Distance
- 18,000,000 light-years
- Angular Size
- 11
Survey Image
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About Fireworks Galaxy
Description
The Fireworks Galaxy (NGC 6946) is a face-on spiral galaxy straddling the border of Cepheus and Cygnus, about 25 million light-years away. It is notable for its prolific supernova production.
Observing Tips
Visible as a round, diffuse glow in a 4-inch telescope. Larger scopes reveal a brighter nucleus with faint spiral arm hints. Low surface brightness means dark skies are important. Best in summer and autumn evenings.
History
Discovered by William Herschel on September 9, 1798. Ten supernovae have been observed in this galaxy since 1917, more than in any other known galaxy.
Fun Facts
With 10 observed supernovae (1917A, 1939C, 1948B, 1968D, 1969P, 1980K, 2002hh, 2004et, 2008S, 2017eaw), NGC 6946 has earned its "Fireworks" nickname. The average galaxy produces only 1-2 supernovae per century.
Community Photos (1)
Credit: Andreigusan. License: CC0. (Wikimedia Commons)
Skybred Mar 2, 2026