IC 10 is an irregular galaxy in the constellation Cassiopeia. It was discovered by Lewis Swift in 1887. Nicholas U. Mayall was the first to suggest that the object is extragalactic in 1935. Edwin Hubble suspected it might belong to the Local Group of galaxies, but its status remained uncertain for decades.

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  • IC 10 is an irregular galaxy in the constellation Cassiopeia. It was discovered by Lewis Swift in 1887. Nicholas U. Mayall was the first to suggest that the object is extragalactic in 1935. Edwin Hubble suspected it might belong to the Local Group of galaxies, but its status remained uncertain for decades. The radial velocity of IC 10 was measured in 1962, and it was found to be receding from the Milky Way at approximately 350 km/s, strengthening the evidence for its membership in the Local Group. Its membership in the group was finally confirmed in 1996 by direct measurements of its distance based on observations of Cepheids. Despite its closeness, the galaxy is rather difficult to study because it lies near the plane of the Milky Way and is therefore heavily obscured by interstellar matter. The apparent distance between IC 10 and the Andromeda Galaxy is about the same as the apparent distance between the Andromeda Galaxy and the Triangulum Galaxy, which suggests that IC 10 may belong to the M31 subgroup. IC 10 is the only known starburst galaxy in the Local Group of galaxies. It has many more Wolf-Rayet stars per square kiloparsec (5.1 stars/kpc²) than the Large Magellanic Cloud (2.0 stars/kpc²) or the Small Magellanic Cloud (0.9 stars/kpc²). Although the galaxy has a luminosity similar to the SMC, it is considerably smaller. Its higher metallicity compared to the SMC suggests that star formation activity has continued for a longer time period. The evolutionary status of the Wolf-Rayet stars suggests that they all formed in a relatively short timespan. The ratio between the two types of Wolf-Rayet stars (WC stars and WN stars) in IC 10 is very different from the ratio in other galaxies in the Local Group, which may be somehow due to the starburst nature of the galaxy. Currently the galaxy produces stars at the rate of 0.04–0.08 solar masses per year, which means that the gas supply in the galaxy can last for only a few billion years longer. Observations of IC 10 in the far-infrared show that the dust in this mild starburst galaxy is deficient in small grains. It is hypothesized that any small grains that formerly existed were destroyed by strong ultraviolet radiation in the areas around the hot luminous stars that were formed in the galaxy's recent burst of star formation. The galaxy has a huge envelope of hydrogen gas, with an apparent size measuring 68′ × 80′, which is far larger than the apparent size of the galaxy in visible light (5.5′ × 7.0′). IC 10 is also unusual in the respect that the visible part of the galaxy seems to rotate in a different direction than the outer envelope. It has a H II nucleus.
  • IC 10 ist eine irreguläre Zwerggalaxie im Sternbild Kassiopeia. Die Galaxie ist Teil der lokalen Gruppe, der auch unsere Heimatgalaxie, die Milchstraße, angehört. Das „IC“ im Namen steht für den Index-Katalog, einen Ende des 19. /Anfang des 20. Jahrhunderts veröffentlichten astronomischen Katalogs von galaktischen Nebeln, Sternhaufen und Galaxien. IC 10 ist eine sehr junge Galaxie mit hochaktiver Sternentstehung, und die der Erde nächste Starburstgalaxie.
  • La galaxia IC 10 es una de las tantas pertenecientes al Grupo local y se encuentra en la constelación de Casiopea (constelación). Es una galaxia que se halla a una distancia aproximada de 3 millones de años luz. Por sus características y dimensiones se asemeja a la denominada Pequeña Nube de Magallanes, y por su distancia a Andrómeda -que es la misma que la existente a Triángulo- quizás forme parte del "subgrupo M31".
  • IC 10 est une galaxie irrégulière naine située dans la constellation de Cassiopée. Située à environ 2,1 millions d’années-lumière de notre Voie lactée, elle fut découverte par l’astronome Lewis Swift en 1889, mais identifiée comme étant une galaxie en 1935 par Nicholas Mayall. Ce n’est qu’en 1996 que son appartenance au Groupe local fut établie par l’observation de ses céphéides. IC 10 est un membre du Groupe local de galaxies, mais elle semble isolée des autres, en particulier des trois principales galaxies spirales (la Voie lactée, M31 et M33). IC 10 est également une galaxie dite « starburst », la plus proche de la nôtre : elle subit en ce moment une formation élevée d’étoiles. Elle possède en son sein la source de rayons X IC 10 X-1, en réalité une binaire X à forte masse, abritant le plus gros trou noir stellaire connu à ce jour (fin 2007).
  • IC 10 è una Galassia nana visibile nella costellazione di Cassiopea. Si presenta nel bel mezzo della Via Lattea boreale, e la sua visuale viene in parte disturbata. Classificata inizialmente come un oggetto appartenente alla nostra Galassia, intorno agli anni 1930 si è avanzata l'ipotesi che si trattasse di un oggetto extragalattico. Edwin Hubble suggerì che poteva trattarsi di un oggetto appena al di fuori del Gruppo Locale, ma la questione venne risolta solo nel 1996, quando, a seguito della scoperta di variabili Cefeidi al suo interno, se ne stabilì l'esatta distanza. IC 10 si trova alla stessa distanza della Galassia del Triangolo rispetto alla Galassia di Andromeda: questo può suggerire che si tratta di una galassia appartenente al sottogruppo di quest'ultima. Si tratta dell'unica galassia dello starburst all'interno del Gruppo Locale; ha una notevole densità di stelle del tipo Wolf-Rayet, se paragonata alle Nubi di Magellano (a questo proposito si può dire che le sue dimensioni sono inferiori a quelle della Piccola Nube di Magellano, sebbene la sua magnitudine assoluta sia paragonabile a quella di quest'ultima). Il livello elevato dell'ossigeno nella galassia, confrontato con quello della Piccola Nube, suggerisce che l'attività di formazione stellare è continuato per un periodo di tempo più lungo, e continua tuttora a ritmo discreto, dato che ogni anno si formano al suo interno oltre 50.000 stelle. L'idrogeno ionizzato (regioni H II) sono molto estese, in particolare verso il centro.
  • IC 10 - galaktyka nieregularna w konstelacji Kasjopei, odległa o 2 200 000 lat świetlnych od Układu Słonecznego. Jej średnica wynosi 6000 lat świetlnych. Galaktyka ta należy do Lokalnej Grupy Galaktyk.
  • IC 10 é uma pequena galáxia irregular na direção da constelação de Cassiopeia. Possui uma declinação de +59° 18′ 14″ e uma ascensão reta de 00 hora, 20 minutos e 17.3 segundos. IC 10 é uma das galáxia do Grupo Local. A galáxia IC 10 foi descoberta por Lewis Swift, em 1889.
  • IC 10 är en galax i stjärnbilden Cassiopeia. Galaxen ligger ungefär 2 miljoner ljusår från vintergatan och är den enda kända starburstgalaxen i den lokala galaxhopen.
  • IC 10 — галактика типу IBm у сузір'ї Кассіопея. Цей об'єкт міститься в оригінальній редакції індексного каталогу.
  • IC 10是一个不规则星系，同时也是一个矮星系和星暴星系。它位于仙后座。它是1889年Lewis Swift发现的。IC 10距离地球所在的银河大约270万光年。它也是已知离地球最近的一个星暴星系。它是本星系群的成员之一。
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  • 10.4 ± 0.2
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  • Irregular Galaxy IC 10.
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  • 6′.8 × 5′.9
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  • dIrr IV/BCD
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  • -348 ± 1 km/ s
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rdfs:comment
  • IC 10 is an irregular galaxy in the constellation Cassiopeia. It was discovered by Lewis Swift in 1887. Nicholas U. Mayall was the first to suggest that the object is extragalactic in 1935. Edwin Hubble suspected it might belong to the Local Group of galaxies, but its status remained uncertain for decades.
  • IC 10 ist eine irreguläre Zwerggalaxie im Sternbild Kassiopeia. Die Galaxie ist Teil der lokalen Gruppe, der auch unsere Heimatgalaxie, die Milchstraße, angehört. Das „IC“ im Namen steht für den Index-Katalog, einen Ende des 19. /Anfang des 20. Jahrhunderts veröffentlichten astronomischen Katalogs von galaktischen Nebeln, Sternhaufen und Galaxien. IC 10 ist eine sehr junge Galaxie mit hochaktiver Sternentstehung, und die der Erde nächste Starburstgalaxie.
  • La galaxia IC 10 es una de las tantas pertenecientes al Grupo local y se encuentra en la constelación de Casiopea (constelación). Es una galaxia que se halla a una distancia aproximada de 3 millones de años luz. Por sus características y dimensiones se asemeja a la denominada Pequeña Nube de Magallanes, y por su distancia a Andrómeda -que es la misma que la existente a Triángulo- quizás forme parte del "subgrupo M31".
  • IC 10 est une galaxie irrégulière naine située dans la constellation de Cassiopée. Située à environ 2,1 millions d’années-lumière de notre Voie lactée, elle fut découverte par l’astronome Lewis Swift en 1889, mais identifiée comme étant une galaxie en 1935 par Nicholas Mayall. Ce n’est qu’en 1996 que son appartenance au Groupe local fut établie par l’observation de ses céphéides.
  • IC 10 è una Galassia nana visibile nella costellazione di Cassiopea. Si presenta nel bel mezzo della Via Lattea boreale, e la sua visuale viene in parte disturbata. Classificata inizialmente come un oggetto appartenente alla nostra Galassia, intorno agli anni 1930 si è avanzata l'ipotesi che si trattasse di un oggetto extragalattico.
  • IC 10 - galaktyka nieregularna w konstelacji Kasjopei, odległa o 2 200 000 lat świetlnych od Układu Słonecznego. Jej średnica wynosi 6000 lat świetlnych. Galaktyka ta należy do Lokalnej Grupy Galaktyk.
  • IC 10 é uma pequena galáxia irregular na direção da constelação de Cassiopeia. Possui uma declinação de +59° 18′ 14″ e uma ascensão reta de 00 hora, 20 minutos e 17.3 segundos. IC 10 é uma das galáxia do Grupo Local. A galáxia IC 10 foi descoberta por Lewis Swift, em 1889.
  • IC 10 är en galax i stjärnbilden Cassiopeia. Galaxen ligger ungefär 2 miljoner ljusår från vintergatan och är den enda kända starburstgalaxen i den lokala galaxhopen.
  • IC 10 — галактика типу IBm у сузір'ї Кассіопея. Цей об'єкт міститься в оригінальній редакції індексного каталогу.
  • IC 10是一个不规则星系，同时也是一个矮星系和星暴星系。它位于仙后座。它是1889年Lewis Swift发现的。IC 10距离地球所在的银河大约270万光年。它也是已知离地球最近的一个星暴星系。它是本星系群的成员之一。
rdfs:label
  • IC 10
  • IC 10
  • Galaxia IC 10
  • IC 10
  • IC 10
  • IC 10
  • IC 10
  • IC 10
  • IC 10
  • IC 10
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