{"id":99,"date":"2016-01-17T16:33:27","date_gmt":"2016-01-17T16:33:27","guid":{"rendered":"http:\/\/www.astronotas.org\/messier\/?p=99"},"modified":"2019-11-29T08:56:41","modified_gmt":"2019-11-29T12:56:41","slug":"m12","status":"publish","type":"post","link":"https:\/\/www.astronotas.org\/messier\/m12\/","title":{"rendered":"Messier 12"},"content":{"rendered":"\n
\"M12\"<\/a><\/figure>\n\n\n\n

Objeto: M12<\/strong><\/p>\n\n\n\n

Constelaci\u00f3n: Ophiuchus
Fecha: 1994.05.08 | Hora: 3:19 UT
Lugar: Jauca, Santa Isabel, PR<\/p>\n\n\n\n

Tipo de objeto: C\u00famulo globular, clase IX
Nombre: NGC 6218
Magnitud: 6.8 | Tama\u00f1o: 10′
R.A. 16h47.2m | Dec. \u20131\u00b057′
\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: 246<\/p>\n\n\n\n

\"M12\"<\/a>
DSS2 @ Wikisky.org<\/figcaption><\/figure>\n\n\n\n

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

Espa\u00f1ol:<\/strong> M12 es un excelente c\u00famulo globular en la constelaci\u00f3n de Ofiuco. Muchas de sus estrellas pueden resolverse (muchas m\u00e1s de las que se pueden resolver en M4, en el Escorpi\u00f3n). Por otro lado, no resulta tan denso como otros globulares, pero su tama\u00f1o es considerable, al igual que su brillantez.<\/p>\n\n\n\n

English: <\/strong>M12 is a great globular cluster in Ophiuchus. Many of its stars can be resolved (many more than M4, in the Scorpion). On the other hand, it is not as dense as other globular clusters, but its size is considerable, as is its brightness.<\/p>\n\n\n\n

\"M12\"<\/a>
Hunter Wilson [origen<\/a>] <\/figcaption><\/figure>\n\n\n\n

Cometarios de Messier en 1771:<\/strong> La misma noche del 30 al 31, descubr\u00ed una nebulosa en la Serpiente, entre el brazo y el lado izquierdo de Ofiuco, siguiendo las cartas de Flamsteed: esta nebulosa no contiene ninguna estrella; es redonda, su di\u00e1metro puede tener 3 minutos de grado, su luz es d\u00e9bil; se ve muy bien con un anteojo ordinario de 3 pies. Determin\u00e9 su posici\u00f3n, compar\u00e1ndola con la estrella \u03b4 de Ofiuco; su ascensi\u00f3n recta fue concluida de 248\u00b0<\/span> 43′ 10″, y su declinaci\u00f3n de 1\u00b0 30′ 28″ meridional. La marqu\u00e9 en la carta de la ruta aparente del cometa que observ\u00e9 el \u00faltimo a\u00f1o. Cerca de esta nebulosa y debajo de ella, hay una estrella de la novena magnitud.<\/p>\n\n\n\n

Comentarios de Messier en 1783:<\/strong> Nebulosa descubierta en la Serpiente, entre el brazo y el lado izquierdo de Ofiuco: esta nebulosa no contiene ninguna estrella, es redonda y su luz d\u00e9bil; cerca de esta nebulosa hay una estrella de novena magnitud. M. Messier la refiere en la segunda carta del cometa observado en 1769. Mem. Acad. a\u00f1o 1775, ilustraci\u00f3n IX.<\/em> Vuelta a ver el 6 de marzo de 1781.<\/p>\n\n\n\n

Mapa para localizar a M12<\/strong><\/p>\n\n\n\n

\"Mapa<\/a>
Haga click para agrandar.<\/figcaption><\/figure>\n\n\n\n
\"M12\"<\/a>
ESO [origen<\/a>] <\/figcaption><\/figure>\n\n\n\n
\"M12\"<\/a>
ESA\/Hubble & NASA [origen<\/a>]<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

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