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Fireworks Galaxy

NGC 6946

Galaxy Excellent (72/100)

Barred Spiral

C12 Galaxy Cepheus Visible Level 4 Large telescope (10"+) - Dark skies recommended
Credit: Andreigusan. License: CC0. (Wikimedia Commons)
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Properties

Magnitude 8.9
Angular Size 11.4′ × 10.8′
Position Angle 52°
Distance 18000000 ly
Galaxy Type Barred Spiral (SABc)
Spiral Galaxy [Distance: 18000000 ly]

Position & Identifiers

RA 20h 34m 52.3s
Dec +60° 09' 14.4"
Constellation Cepheus
Catalog C12

Visibility

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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)

Credit: Andreigusan. License: CC0. (Wikimedia Commons)

Skybred Mar 2, 2026