C30
NGC 7331
Dados do Objeto
- Designação do Catálogo
- C30
- Tipo
- Galaxy
- Constelação
- Pegasus
- Magnitude
- 9.5
- Ascensão Reta
- 22h 37m 04.1s
- Declinação
- +34° 25' 01.2"
- Distância
- 49,000,000 anos-luz
- Tamanho Angular
- 11
Imagem de Levantamento
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Sobre C30
Descrição
NGC 7331 is a bright spiral galaxy in Pegasus, about 40 million light-years away. Often called the Milky Way's twin, it is a large, inclined spiral with a prominent bulge and well-defined dust lanes. It appears to lead a small group of background galaxies known as the Deer Lick Group.
Dicas de Observação
One of the brighter non-Messier galaxies, visible in a 4-inch telescope as an elongated glow with a bright core. An 8-inch scope shows the disk and hints of dust lanes. The four smaller background galaxies require 10 inches or more. Best in autumn.
História
Discovered by William Herschel on September 5, 1784. The group of background galaxies (NGC 7335, 7336, 7337, 7340) was once thought to be physically associated but lies 10 times more distant.
Curiosidades
NGC 7331 rotates in the opposite direction from what its spiral arm winding would suggest, a phenomenon called "backwards spinning" that remains unexplained.
Fotos da Comunidade (1)
Credit: Ngc1535. License: CC BY 3.0. (Wikimedia Commons)
Skybred Mar 2, 2026