{"id":48,"date":"2004-10-14T22:40:00","date_gmt":"2004-10-14T22:40:00","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2004\/10\/14\/m39\/"},"modified":"2021-11-27T19:17:52","modified_gmt":"2021-11-27T19:17:52","slug":"m39","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2004\/10\/14\/m39\/","title":{"rendered":"Messier 39"},"content":{"rendered":"

<\/p>\n

Observation Notes:<\/b><\/p>\n

A bright, large, open cluster with a couple dozen bright stars and many more dimmer ones. It filled the 1.4 degree field of view. The main area fits in about a half degree area. All stars appear to be white. I saw quite a lot of double stars evident throughout the cluster.<\/p>\n

Factoids:<\/b><\/p>\n

M39 is a 230 to 300 million year old cluster that resides about 800 light years away. Within its 7 light year diameter, there are about 30 proven members, with from 50 to 100 stars suspected to be members. It is moving toward us at 28 km\/sec.<\/p>\n

While Charles Messier catalogued M39 in 1764, there is some contention that Le Gentil discovered it in 1750, and that Aristotle noted it as a cometary object in 325 BC.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\nM39\/NGC 7092<\/td>\n<\/tr>\n
Classification<\/b><\/td>\nOpen Cluster<\/td>\n<\/tr>\n
Position<\/b><\/td>\nCygnus [RA: 21:32.2 \/ Dec: +48:26]*<\/td>\n<\/tr>\n
Size*<\/b><\/td>\n32′<\/td>\n<\/tr>\n
Brightness*<\/b><\/td>\n4.6<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\n10\/14\/04 – 10:40 PM<\/td>\n<\/tr>\n
Observing Loc.<\/b><\/td>\nFlagstaff, AZ – Home<\/td>\n<\/tr>\n
Instrument<\/b><\/td>\nOrion SVP 6LT Reflector (150 mm dia.\/1200 mm F\/L)<\/td>\n<\/tr>\n
Eyepieces\/Mag.<\/b><\/td>\n32 mm (37X)<\/td>\n<\/tr>\n
Seeing<\/b><\/td>\n3\/10<\/td>\n<\/tr>\n
Transparency<\/b><\/td>\nMag 5.8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

* Based on published data.<\/p>\n","protected":false},"excerpt":{"rendered":"

M039<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[16,18,24,19,21,25,22,37,15],"tags":[],"class_list":["post-48","post","type-post","status-publish","format-standard","hentry","category-deep-sky","category-messier","category-open-cluster","category-sg-deep-sky","category-sg-messier","category-sg-open-cluster","category-sg-star-cluster","category-sgc-cygnus","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":79,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/01\/16\/m67\/","url_meta":{"origin":48,"position":0},"title":"Messier 67","author":"jperez1690","date":"January 16, 2005","format":false,"excerpt":"M067","rel":"","context":"In "Deep Sky"","block_context":{"text":"Deep Sky","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/deep-sky\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":47,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/10\/14\/m2\/","url_meta":{"origin":48,"position":1},"title":"Messier 2","author":"jperez1690","date":"October 14, 2004","format":false,"excerpt":"M002","rel":"","context":"In "Deep Sky"","block_context":{"text":"Deep Sky","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/deep-sky\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":104,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/02\/04\/m47_and_ngc_242\/","url_meta":{"origin":48,"position":2},"title":"Messier 47 and NGC 2423","author":"jperez1690","date":"February 4, 2005","format":false,"excerpt":"M047","rel":"","context":"In "Deep Sky"","block_context":{"text":"Deep Sky","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/deep-sky\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":115,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/03\/11\/m48\/","url_meta":{"origin":48,"position":3},"title":"Messier 48","author":"jperez1690","date":"March 11, 2005","format":false,"excerpt":"M048","rel":"","context":"In "Deep Sky"","block_context":{"text":"Deep Sky","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/deep-sky\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":108,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/02\/12\/m103\/","url_meta":{"origin":48,"position":4},"title":"Messier 103","author":"jperez1690","date":"February 12, 2005","format":false,"excerpt":"M103","rel":"","context":"In "Deep Sky"","block_context":{"text":"Deep Sky","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/deep-sky\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":49,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/10\/15\/m80\/","url_meta":{"origin":48,"position":5},"title":"Messier 80","author":"jperez1690","date":"October 15, 2004","format":false,"excerpt":"M080","rel":"","context":"In "Deep Sky"","block_context":{"text":"Deep Sky","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/deep-sky\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/48","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/comments?post=48"}],"version-history":[{"count":1,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/48\/revisions"}],"predecessor-version":[{"id":684,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/48\/revisions\/684"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=48"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=48"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=48"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}