{"id":107,"date":"2016-01-18T02:29:48","date_gmt":"2016-01-18T02:29:48","guid":{"rendered":"http:\/\/www.astronotas.org\/messier\/?p=107"},"modified":"2023-12-09T14:40:10","modified_gmt":"2023-12-09T18:40:10","slug":"m18","status":"publish","type":"post","link":"https:\/\/www.astronotas.org\/messier\/m18\/","title":{"rendered":"Messier 18"},"content":{"rendered":"\n
\"M18\"<\/a><\/figure>\n\n\n\n

Objeto: M18<\/strong><\/p>\n\n\n\n

Constelaci\u00f3n: Sagittarius
Fecha: 1994.08.04 | Hora: 4:18 UT
Lugar: Jauca, Santa Isabel, PR<\/p>\n\n\n\n

Tipo de objeto: C\u00famulo abierto, clase D
Nombre: NGC 6613
Magnitud: 6.9 | Tama\u00f1o: 9′
A.R. 18h19.9m | Dec. \u201317\u00b008′
\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: 339<\/p>\n\n\n\n

\"M18\"<\/a>
DSS2 @ Wikisky.org<\/figcaption><\/figure>\n\n\n\n

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

Espa\u00f1ol:<\/strong> Comparado con otros objetos en la vecindad, M18 resulta poco impresionante. Es visible dentro del mismo campo de visi\u00f3n de M17 (que se localiza a 1\u00b0 hacia el norte) en el ocular de menor aumento (30x). El color de sus estrellas es blanco.<\/p>\n\n\n\n

English:<\/strong> Compared to other objects in the vicinity, M18 is unimpressive. It is visible within the same field of view of M17 (which is located 1\u00b0 to the north) in low magnification eyepiece (30x). The color of its stars is white.<\/p>\n\n\n\n

Cometarios de Messier en 1771:<\/strong> La misma noche, descubr\u00ed un poco debajo de la nebulosa reportada aqu\u00ed arriba, un c\u00famulo de peque\u00f1as estrellas, rodeadas de una ligera nebulosidad; su extensi\u00f3n puede tener 5 minutos de grado: sus apariencias son menos sensibles con un anteojo ordinario de 3 pies y medio que aquella de los dos precedentes: con un teleanteojo, este c\u00famulo de estrellas parece de la forma de una nebulosa; pero empleando un buen instrumento, como hice, se ven muchas estrellas peque\u00f1as; de acuerdo a mis observaciones determin\u00e9 su posici\u00f3n: su ascensi\u00f3n recta es de 271\u00b0 34′ 3″ y su declinaci\u00f3n de 17\u00b0 13′ 14″ meridional.<\/p>\n\n\n\n

\"M18\"<\/a>
Hillary Mathis, REU program\/NOAO\/AURA\/NSF [origen<\/a>] <\/figcaption><\/figure>\n\n\n\n

Comentarios de Messier en 1783:<\/strong> C\u00famulo de peque\u00f1as estrellas, un poco debajo de la nebulosa aqu\u00ed arriba, n.\u00ba 17, rodeada de una ligera nebulosidad, este c\u00famulo menos aparente que el precedente, n.\u00ba 16: con un anteojo ordinario de tres pies y medio, este c\u00famulo aparenta la forma de una nebulosa; pero con un buen anteojo lo que se ve son solo estrellas.<\/p>\n\n\n\n

Mapa para localizar a M18<\/strong><\/p>\n\n\n\n

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

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