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Grupo De Galaxias NGC 1023 - Ngcs: 891, 925, 1023 Y 1058

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Grupo De Galaxias NGC 1023 - Ngcs: 891, 925, 1023 Y 1058 Grupo de galaxias NGC 1023 - NGCs: 891, 925, 1023 y 1058 Posición. Justo por debajo de La Vía Láctea y en una zona, de nos 10º x 10º, que ocupa parte de las constelaciones de Andrómeda, Perseo y el Triángulo encontramos este grupo físico de galaxias. Época. Las constelaciones, antes mencionadas, son típicas de las noches otoñales en el hemisferio norte, y la zona donde se encuentra el grupo de NGC 1023 alcanza su mayor altura sobre el horizonte en el mes de octubre alrededor de las 00:00 h y en el mes de diciembre alrededor de las 22:00h. Objetos. El Grupo de NGC 1023 es un cúmulo de galaxias de tipo tardío que se hallan a unos 10Mpac. Miembros principales del cúmulo: NGC 925 (domina un subgrupo con UGC 1865 y UGC 1924), NGC 1023 (es la principal de todo el cúmulo y lidera otro subgrupo con NGC 891, NGC 949, NGC 1003, NGC 1058, UGC 2014, UGC 2034 y UGC 2259), NGC 746 e IC 239. NGC 891 Es uno de los mejores ejemplos de galaxia espiral vista de canto. Su parecido a la Vía Láctea es extraordinario, entre otros parámetros en tamaño, luminosidad y estructura barrada; por lo que es objeto de muchos estudios. NGC 925 Galaxia espiral en la que estudios en su estructura y formación estelar muestran asimetrías más comunes de las galaxias irregulares, pensándose que ha podido tener un encuentro con otra galaxia en el pasado. NGC 1023 Es una galaxia lenticular con forma de disco y una protuberancia central muy brillante, pero sin brazos espirales en el disco. La galaxia está rodeada por un halo tenue. Tiene una compañera, casi imperceptible, en su lado oriental. NGC 1058 Tenue galaxia espiral vista de cara. Se encuentra algo más cerca que las demás galaxias de la propuesta, por lo que resulta fácil adivinar su pequeño tamaño real comparándolo con el de las demás. Carta de localización NGC 891 Galaxia Espiral Mag.: 10 B. superf.: 13,7 Tamaño: 13,5’ x 2,5’ Distancia: 32 millones al. Constelación: Andromeda Coordenadas: AR 02h 23m 31.3s DE +42º 24' 52" Clase morfológica: SA(s)b? edge-on Gx espiral (sin anillo interior) de importante bulbo y brazos ceñidos? vista de canto Clase luminosidad: II Estructura espiral ordena y definida Descripción NGC: ! B, vL, vmE 22° Objeto notable, brillante, muy grande, muy alargado sobre un ángulo de posición de 22º Nota: Miembro del grupo NGC 1023. Evidente línea oscura ecuatorial Apuntes Observador Telescopio Buscador Filtro Male Altura obj. Fecha Lugar (1)Identificación (2)Brillo (3)Tamaño (4)Forma (5)Rasgo notab. (6)Campo (7)Mejor visión Ejemplos: (1) Buscador, 40x, 80x,… (2) Muy brillante, brillante, tenue,… (3) arc / m, en relación al ocular… (4) Redonda, elíptica, irregular,… (5) Forma o detalle llamativo, color,… (6) Riqueza estelar, estrella muy brillante, otro objeto,… (7) 40x, 80x, 120x, mejor imagen. Carta NGC 925 Galaxia Espiral Mag.: 9,7 B. superf.: 14 Tamaño: 10,5’ x 5,9’ Distancia: 30 millones al. Constelación: Triangulum Coordenadas: AR 02h 28m 10.5s DE +33º 38' 48" Clase morfológica: SAB(s)d Gx espiral con barra definida pero débil (sin anillo interior) y de brazos muy sueltos Clase luminosidad: IV Estructura espiral poco marcada y algo caótica Descripción NGC: cF, cL, E, vgbM, 2 st 13 np Considerablemente tenue, considerablemente grande, alargada, muy de repente más brillante hacia el medio y con dos estrellas de magnitud 13 en su borde norte. Nota: Miembro del grupo NGC 1023. Espiral basta Apuntes Observador Telescopio Buscador Filtro Male Altura obj. Fecha Lugar (1)Identificación (2)Brillo (3)Tamaño (4)Forma (5)Rasgo notab. (6)Campo (7)Mejor visión Ejemplos: (1) Buscador, 40x, 80x,… (2) Muy brillante, brillante, tenue,… (3) arc / m, en relación al ocular… (4) Redonda, elíptica, irregular,… (5) Forma o detalle llamativo, color,… (6) Riqueza estelar, estrella muy brillante, otro objeto,… (7) 40x, 80x, 120x, mejor imagen. Carta NGC 1023 Galaxia Lenticular Mag.: 9,5 B. superf.: 12,9 Tamaño: 8,7’ x 3,0’ Distancia: 34 millones al. Constelación: Perseus Coordenadas: AR 02h 41m 19.0s DE +39º 07’ 37” Clase morfológica: SB0^-(rs) Gx lenticular barrada con características próximas a espiral (indicios de anillo interior) Descripción NGC: vB, vL, cmE, vvmbM Muy brillante, muy grande, muy alargada, muchísimo más brillante hacia el medio Nota: La más brillante del Grupo NGC 1023. Débil Gx E en su punta este. Apuntes Observador Telescopio Buscador Filtro Male Altura obj. Fecha Lugar (1)Identificación (2)Brillo (3)Tamaño (4)Forma (5)Rasgo notab. (6)Campo (7)Mejor visión Ejemplos: (1) Buscador, 40x, 80x,… (2) Muy brillante, brillante, tenue,… (3) arc / m, en relación al ocular… (4) Redonda, elíptica, irregular,… (5) Forma o detalle llamativo, color,… (6) Riqueza estelar, estrella muy brillante, otro objeto,… (7) 40x, 80x, 120x, mejor imagen. Carta NGC 1058 Galaxia Espiral Mag.: 11,4 B. superf.: 13,5 Tamaño: 3,0’ x 2,8’ Distancia: 29,5 millones al. Constelación: Perseus Coordenadas: AR 02h 44m 24.5s DE +37º 23' 35" Clase morfológica: SA(rs)c Gx espiral (con indicios de disco interior) de bulbo modesto y brazos bastante sueltos Clase Luminosidad: III Estructura espiral poco marcada y poco definida Descripción NGC: pF, cL, R, glbM Bastante tenue, considerablemente grande, redonda, gradualmente poco más brillante hacia el medio. Nota: Miembro del Grupo NGC 1023. Cuerpo principal desigual. Patrón de brazo multiple. Apuntes Observador Telescopio Buscador Filtro Male Altura obj. Fecha Lugar (1)Identificación (2)Brillo (3)Tamaño (4)Forma (5)Rasgo notab. (6)Campo (7)Mejor visión Ejemplos: (1) Buscador, 40x, 80x,… (2) Muy brillante, brillante, tenue,… (3) arc / m, en relación al ocular… (4) Redonda, elíptica, irregular,… (5) Forma o detalle llamativo, color,… (6) Riqueza estelar, estrella muy brillante, otro objeto,… (7) 40x, 80x, 120x, mejor imagen. Carta Fuentes: clasificación y distancia de galaxias en http://ned.ipac.caltech.edu/, otros datos de objetos en http://www.ngcicproject.org/, fotografías en http://archive.stsci.edu/, .
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