{"id":164,"date":"2005-08-27T00:10:00","date_gmt":"2005-08-27T00:10:00","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2005\/08\/27\/m30\/"},"modified":"2021-11-27T23:02:59","modified_gmt":"2021-11-27T23:02:59","slug":"m30","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2005\/08\/27\/m30\/","title":{"rendered":"Messier 30"},"content":{"rendered":"

<\/p>\n

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

This was a rewarding cluster to observe. It was a pleasant sight at 38X, 120X, and 240X. At 120 and 240 X, it began to resolve into stars along the edges. Several were constantly visible, with many more forming a granular splat just east of a bright 8.6 mag star (SAO 190531). A couple seeming appendages sprayed off the north and northwest sides, consisting of at least 4 stars for the northwest streamer and at least 2 stars for the northern one. The core verged on stellar, but not quite. If I had sketched at 240X, I could have done a better job plotting star positions across the surface, but there wasn’t time for a second sketch (rising moon). It was circular overall, but seemed to have a flat edge to the core region along the south side. I estimated it’s visual extent at 3′.<\/p>\n

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

M30 lies about 26,000 light years away and is about 90 light years across. Its core is very small, measuring about 7″ across, for a diameter of 0.9 light years. It is approaching us at 181.9 km\/sec.<\/p>\n

It was first discovered by Charles Messier in 1764. William Herschel first resolved it into stars in 1784. The 2 streamers of stars that jumped out at me during the observation were also noted by Herschel: “Towards the north, are two rows of bright stars 4 or 5 in a line.”<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\nM30 (NGC 7099)<\/td>\n<\/tr>\n
Classification<\/b><\/td>\nGlobular Cluster (Class V)<\/td>\n<\/tr>\n
Position*<\/b><\/td>\nCapricornus [RA: 21:40:24 \/ Dec: -23:11:00]<\/td>\n<\/tr>\n
Size*<\/b><\/td>\n12,0′<\/td>\n<\/tr>\n
Brightness*<\/b><\/td>\n7.2<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\nAugust 27, 2005 – 12:10 AM
\n(August 28, 2005 – 07:10 UT)<\/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>\n10 mm (120X)<\/td>\n<\/tr>\n
Conditions<\/b><\/td>\nClear, calm, 64\u00ef\u00bf\u00bd F<\/td>\n<\/tr>\n
Seeing<\/b><\/td>\n~4\/10<\/td>\n<\/tr>\n
Transparency<\/b><\/td>\nMag 5.2 NELM<\/td>\n<\/tr>\n
Sources<\/b><\/td>\nSEDS<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

M030<\/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":[16,17,18,19,20,21,22,82,15],"tags":[],"class_list":["post-164","post","type-post","status-publish","format-standard","hentry","category-deep-sky","category-globular-cluster","category-messier","category-sg-deep-sky","category-sg-globular-cluster","category-sg-messier","category-sg-star-cluster","category-sgc-capricornus","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":41,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/10\/09\/m15\/","url_meta":{"origin":164,"position":0},"title":"Messier 15","author":"jperez1690","date":"October 9, 2004","format":false,"excerpt":"M015","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":102,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/02\/04\/m79\/","url_meta":{"origin":164,"position":1},"title":"Messier 79","author":"jperez1690","date":"February 4, 2005","format":false,"excerpt":"M079","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":418,"url":"https:\/\/perezmedia.net\/beltofvenus\/2008\/07\/13\/m3\/","url_meta":{"origin":164,"position":2},"title":"Messier 3","author":"jperez1690","date":"July 13, 2008","format":false,"excerpt":"M003","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":194,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/10\/02\/m19\/","url_meta":{"origin":164,"position":3},"title":"Messier 19","author":"jperez1690","date":"October 2, 2005","format":false,"excerpt":"M019","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":253,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/05\/24\/m13_hercules_gl\/","url_meta":{"origin":164,"position":4},"title":"Messier 13 – Hercules Globular Cluster","author":"jperez1690","date":"May 24, 2006","format":false,"excerpt":"M013","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":164,"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\/164","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=164"}],"version-history":[{"count":1,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/164\/revisions"}],"predecessor-version":[{"id":742,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/164\/revisions\/742"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=164"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=164"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=164"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}