{"id":85,"date":"2016-01-13T23:23:35","date_gmt":"2016-01-13T23:23:35","guid":{"rendered":"http:\/\/www.astronotas.org\/messier\/?p=85"},"modified":"2019-11-28T20:21:12","modified_gmt":"2019-11-29T00:21:12","slug":"m2","status":"publish","type":"post","link":"https:\/\/www.astronotas.org\/messier\/m2\/","title":{"rendered":"Messier 2"},"content":{"rendered":"\n
\"M2\"<\/a><\/figure>\n\n\n\n

Objeto: M2<\/strong><\/p>\n\n\n\n

Constelaci\u00f3n: Aquarius
Fecha: 1994.06.12 | Hora: 3:05 UT
Lugar: Hacienda La Esperanza, Manat\u00ed, PR.<\/p>\n\n\n\n

Tipo de objeto: C\u00famulo globular, clase II
Nombre: NGC 7089
Magnitud: 6.5 | Tama\u00f1o: 13′
A.R. 21h33.5m | Dec. \u20130\u00b049′
\u00c9poca: 2000.0<\/p>\n\n\n\n

Instrumento: Meade MTS-SN 6
Ocular: 8.8 mm UWA | Aumento: 87x
Campo aparente: 84\u00b0 | Campo actual: 57′
Otros:<\/p>\n\n\n\n

Carta en Uranometr\u00eda 2000.0: 255<\/p>\n\n\n\n

\"M2\"
DSS2 @ Wikisky.org<\/figcaption><\/figure>\n\n\n\n

Descripci\u00f3n<\/h3>\n\n\n\n

Espa\u00f1ol:<\/strong> M2 se puede clasificar como un buen objeto, de considerable tama\u00f1o. Es un c\u00famulo globular muy denso, especialmente hacia el centro, y brillante. Se pod\u00edan resolver estrellas hacia el borde.<\/p>\n\n\n\n

English:<\/strong> M2 can be classified as a nice object, of considerable size. It is a very dense and bright globular cluster, especially towards the center. It was possible to resolve stars near the edges.<\/p>\n\n\n\n

Comentario de Messier en 1771: <\/strong>El 11 de septiembre de 1760, descubr\u00ed en la cabeza del Acuario una bella nebulosa que no contiene ninguna estrella; la examin\u00e9 con un buen telescopio gregoriano de 30 pulgadas de largo focal, que aumentaba ciento cuatro veces; el centro es brillante, y la nebulosidad que lo rodea es redonda; se parece bastante a la bella nebulosa que se encuentra entre la cabeza y el arco del Sagitario: puede tener 4 arcos de minuto de di\u00e1metro; se v\u00eda muy bien en un anteojo ordinario de 2 pies; compar\u00e9 su paso por el meridiano con el de \u03b1 del Acuario que se encontraba sobre el mismo paralelo; su ascensi\u00f3n recta fue concluida de 320\u00b0 17\u2032,  y su declinaci\u00f3n de 1\u00b0 47\u2032 meridional. La noche del 26 al  27 de julio de 1764, volv\u00ed a ver esta nebulosa por segunda ocasi\u00f3n; se ve\u00eda igual, teniendo las mismas apariencias. Esta nebulosa se encuentra ubicada en la misma carta del c\u00e9lebre cometa de Halley, que observ\u00e9 a su regreso en 1759b<\/sup>. [Nota al margen en el original: b<\/sup> Ibid. a\u00f1o 1760, p\u00e1gina 464.<\/em>]<\/p>\n\n\n\n

Desde el descubrimiento de esta nebulosa en 1760, habiendo tenido curiosidad de buscar entre todo lo que se ha sido publicado sobre los cometas; encontr\u00e9 en los vol\u00famenes de la Academia del a\u00f1o 1746, una Memoria de M. Maraldi, sobre el cometa visto ese a\u00f1o en Lausanne por M. de Cheseaux: M. Maraldi cuenta en esa Memoria el descubrimiento de esta misma nebulosa, que \u00e9l divis\u00f3 por primera vez el 11 de septiembre, mientras observaba este cometa. He aqu\u00ed lo que dice: \u00abel 11 de septiembre de 1746, observ\u00e9 una nebulosa cuya ascensi\u00f3n recta es de 320\u00b0 17\u2032 19\u2033, y su declinaci\u00f3n de 1\u00b0 55\u2032 38\u2033 hacia el sur, aproximadamente en el mismo paralelo donde deb\u00eda estar el cometa: esta nebulosa es [p. 437] redonda, bien acabada y m\u00e1s clara en el centro, ocupa alrededor de 4 o 5 minutos de grado, y no est\u00e1 rodeada de ninguna estrella, lo mismo a una distancia bastante grande; no se ve\u00eda ninguna en toda la apertura del anteojo, lo que me pareci\u00f3 muy singular; pues la mayor\u00eda de las estrellas que se llaman nebulosas est\u00e1n rodeadas de un gran n\u00famero de estrellas; lo que ha hecho juzgar que la blancura que se descubre es el efecto de la luz de un c\u00famulo de estrellas demasiado peque\u00f1as para ser percibidas por los m\u00e1s grandes anteojos: confund\u00ed de primera intenci\u00f3n esta nebulosa con el cometa.\u00bb<\/p>\n\n\n\n

\"M2\"<\/a>
Hunter Wilson [origen<\/a>]<\/figcaption><\/figure>\n\n\n\n

Comentario de Messier en 1784:<\/strong> Nebulosa sin estrella en la cabeza del Acuario, el centro es brillante y la luz que le rodea es redonda; se parece a la bella nebulosa que se encuentra entre la cabeza y el arco del Sagitario, se ve muy bien con un anteojo de dos pies, localizada sobre el paralelo de \u03b1 del Acuario. M. Messier ha reportado esta nebulosa en la carta de la ruta del cometa observado en 1759. Mem. Acad. a\u00f1o 1760, p\u00e1gina 464.<\/em> M. Maraldi vio esta nebulosa en 1746, mientras observaba el cometa que apareci\u00f3 este a\u00f1o.<\/p>\n\n\n\n

Mapa para localizar a M2<\/strong><\/p>\n\n\n\n

\"Mapa<\/a>
Haga click par agrandar.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

Objeto: M2 Constelaci\u00f3n: AquariusFecha: 1994.06.12 | Hora: 3:05 UTLugar: Hacienda La Esperanza, Manat\u00ed, PR. 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