{"id":91,"date":"2016-01-14T23:02:51","date_gmt":"2016-01-14T23:02:51","guid":{"rendered":"http:\/\/www.astronotas.org\/messier\/?p=91"},"modified":"2023-12-09T11:46:30","modified_gmt":"2023-12-09T15:46:30","slug":"m7","status":"publish","type":"post","link":"https:\/\/www.astronotas.org\/messier\/m7\/","title":{"rendered":"Messier 7"},"content":{"rendered":"\n
\"M7\"<\/a><\/figure>\n\n\n\n

Objeto: M7<\/strong><\/p>\n\n\n\n

Constelaci\u00f3n: Scorpius
Fecha: 1991.08.06 | Hora: n\/a UT
Lugar: Sumidero, Aguas Buenas, PR<\/p>\n\n\n\n

Tipo de objeto: C\u00famulo abierto, clase E
Nombre: C\u00famulo de Ptolomeo, NGC 6475
Magnitud: 3.3 | Tama\u00f1o: 80′
A.R. 17h53.9m | Dec. \u201334\u00b049′
\u00c9poca: 2000.0<\/p>\n\n\n\n

Instrumento: Meade MTS-SN 6
Ocular: 25 mm MA | Aumento: 30x
Campo aparente: 40\u00b0 | Campo actual: 1\u00b020′
Otros:<\/p>\n\n\n\n

Carta en Uranometr\u00eda 2000.0: 377<\/p>\n\n\n\n

\"M6<\/a>
M6 (arriba) y M7 (abajo). John Mirtle [origen<\/a>]<\/figcaption><\/figure>\n\n\n\n

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

Espa\u00f1ol:<\/strong> M7 est\u00e1 localizado, en t\u00e9rminos pr\u00e1cticos, al final de la cola del Escorpi\u00f3n y es visible a simple vista con much\u00edsima facilidad. Con una magnitud de 3.3, es m\u00e1s brillante que muchas de las estrellas que podemos ver a simple vista. De hecho, al menos tres de sus componentes est\u00e1n en el l\u00edmite de visibilidad (5.60 a 5.96 de magnitud). Binoculares 7×35 son suficientes para resaltar la imagen de este c\u00famulo. Con el telescopio, a 30x, es, simplemente, fant\u00e1stico: el campo de visi\u00f3n se llena de estrellas, muchas de ellas brillantes. Mayores magnificaciones impiden, por lo general, que se pueda apreciar el c\u00famulo en toda su extensi\u00f3n (dentro de un mismo campo de visi\u00f3n).<\/p>\n\n\n\n

English: <\/strong>Practically, M7 is at the end of the Scorpion’s tail, and is visible to the naked eye with ease. At magnitude 3.3, it is brighter than many other stars in the night sky. Actually, at least three of its members are in the threshold of naked-eye visibility (5.60 to 5.96 magnitude). A pair of 7x35mm binoculars are enough to improve this cluster’s image. With the telescope at 30x it looks simply stunning: the whole field of view becomes crowded with stars, many of them pretty bright. More power usually impairs the view since you can’t see all of the cluster at a single glance (in the same field of view).<\/p>\n\n\n\n

\"M7\"<\/a>
N.A.Sharp, REU program\/NOAO\/AURA\/NSF. [origen<\/a>] <\/figcaption><\/figure>\n\n\n\n

Comentario de Messier en 1771:<\/strong> Determin\u00e9 la misma noche la posici\u00f3n de otro c\u00famulo de estrellas que es m\u00e1s considerable y de una m\u00e1s grande extensi\u00f3n: su di\u00e1metro pudo ocupar 30 minutos de grado. Este c\u00famulo de estrellas tambi\u00e9n es visible a simple vista como una nebulosidad considerable: pero cuando se examina con un anteojo, la nebulosidad desapareci\u00f3, y solo se percibi\u00f3 un c\u00famulo de peque\u00f1as estrellas, entre las cuales hay algunas que tienen m\u00e1s luz: este c\u00famulo est\u00e1 poco alejado del precedente: est\u00e1 entre el arco del Sagitario y la cola del Escorpi\u00f3n. Observ\u00e9 en el Meridiano el paso del centro de este c\u00famulo, y lo compar\u00e9 con la estrella \u03b5 del Sagitario para determinar su posici\u00f3n: su ascensi\u00f3n recta fue de 264\u00b0 30′ 24″, y su declinaci\u00f3n de 34\u00b0 40′ 34″ meridional.<\/p>\n\n\n\n

Comentario de Messier en 1784: <\/strong>C\u00famulo de estrellas m\u00e1s considerable que el anterior; este c\u00famulo aparece a simple vista como una nebulosidad, est\u00e1 poco alejado del anterior, localizado entre el arco del Sagitario y la cola del Escorpi\u00f3n.<\/p>\n\n\n\n

Mapa para localizar a M7<\/strong><\/p>\n\n\n\n

\"Mapa<\/a>
Haga click para agrandar.<\/figcaption><\/figure>\n\n\n\n
\"M7\"<\/a>
ESO [origen<\/a>] <\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

Objeto: M7 Constelaci\u00f3n: ScorpiusFecha: 1991.08.06 | Hora: n\/a UTLugar: Sumidero, Aguas Buenas, PR Tipo de objeto: C\u00famulo abierto, clase ENombre: C\u00famulo de Ptolomeo, NGC 6475Magnitud: 3.3 | Tama\u00f1o: 80′A.R. 17h53.9m | Dec. \u201334\u00b049′\u00c9poca: 2000.0 Instrumento: Meade MTS-SN 6Ocular: 25 mm… Continue Reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[19],"tags":[464,22,95,23,16],"class_list":["post-91","post","type-post","status-publish","format-standard","hentry","category-cumulos-abiertos","tag-cumulo-de-ptolomeo","tag-m7","tag-messier-7","tag-ngc-6475","tag-scorpius"],"yoast_head":"\nMessier 7 - 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