{"id":109,"date":"2005-02-13T00:45:00","date_gmt":"2005-02-13T00:45:00","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2005\/02\/13\/m81_bodes_galax\/"},"modified":"2021-11-27T19:55:27","modified_gmt":"2021-11-27T19:55:27","slug":"m81_bodes_galax","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2005\/02\/13\/m81_bodes_galax\/","title":{"rendered":"Messier 81 and Messier 82 – Bode’s Galaxy and The Cigar Galaxy"},"content":{"rendered":"

<\/p>\n

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

These 2 galaxies are impressive. They were an amazing treat that fit into the same view together–big and bright.<\/p>\n

M81 was the larger, brighter, and wider of the two galaxies, elongated north to south. It had a strongly condensed nucleus. It seemed to have a sharper edge on the west side, and had a hint of detached brightening suggesting an arm on the northwest side. There were two stars involved in the glow of the galaxy on the south side, as well as two dimmer stars in the area I think I’m seeing an arm. I would estimate its size at 20′ x 10′.<\/p>\n

M82 was slender and aligned east-northeast to west-southwest. The north side seemed to have the sharpest edge. There wasn’t a distinct nucleus, although it did brighten toward the middle axis. It was brightest just east of center. Its size seemed to be about 12′ x 3′. When I checked it at 120X (not sketched), it displayed an irregular mottled appearance.<\/p>\n

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

M81 is the brightest galaxy of the M81 group. A few tens of millions of years ago, M81 had a close interaction with its neighbor M82. M81’s spiral structure was effected, becoming more pronounced, as well as forming a dark linear feature northeast of the nuclear region. It’s distance is estimated at nearly 12 million light years. An unusual aspect of the galaxy is that it appears to have very little dark matter, as it’s rotational velocity drops off in its outer region much more than in most galaxies.<\/p>\n

M82 lies about 150,000 light years north of M81. After its interaction with M81, M82’s core has entered a period of heavy starburst with conspicuous dark lanes. Over 100 young globular clusters have been discovered as likely results of this encounter. The explosive gas flow is a strong source of radio noise, which was discovered by Henbury Brown in 1953. M82 is also the brightest infrared galaxy in the sky. As with its companion, it lies nearly 12 million light years away.<\/p>\n

Both galaxies were discovered by Johann Elert Bode in 1774, rediscovered by Pierre M\u00e9chain in 1779 and cataloged by Charles Messier in 1781.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\nM81 (NGC 3031)
\nM82 (NGC 3034)<\/td>\n<\/tr>\n
Classification<\/b><\/td>\nM81: Spiral Galaxy – Type Sb
\nM82: Irregular Galaxy – Type Ir-II<\/td>\n<\/tr>\n
Position*<\/b><\/td>\nM81: Ursa Major [RA: 09:55.6 \/ Dec: +69:04]
\nM82: Ursa Major [RA: 09:55.8 \/ Dec: +69:41]<\/td>\n<\/tr>\n
Size*<\/b><\/td>\nM81: 21′ x 10′; M82: 9′ x 4′<\/td>\n<\/tr>\n
Brightness*<\/b><\/td>\nM81: 6.9; M82: 8.4<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\nFebruary 13, 2005 – 12:45 AM
\n(February 13, 2005 – 07:45 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>\n32 mm (37X); 10 mm (120X)<\/td>\n<\/tr>\n
Conditions<\/b><\/td>\nClear, 31\u00b0F, breezy<\/td>\n<\/tr>\n
Seeing<\/b><\/td>\n1-2\/10<\/td>\n<\/tr>\n
Transparency (NELM)<\/b><\/td>\nMag 5.8<\/td>\n<\/tr>\n
Sources<\/b><\/td>\nSEDS<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

*Based on published data.<\/p>\n


\nSketch of M81 and M82<\/a>
\nObservation Notes:<\/b>
\nFinder Sketch of M81\/M82<\/a>
\nThese 2 galaxies are impressive. They were an amazing treat that fit into the same view together–big and bright.
\nM81 was the larger, brighter, and wider of the two galaxies, elongated north to south. It had a strongly condensed nucleus. It seemed to have a sharper edge on the west side, and had a hint of detached brightening suggesting an arm on the northwest side. There were two stars involved in the glow of the galaxy on the south side, as well as two dimmer stars in the area I think I’m seeing an arm. I would estimate its size at 20′ x 10′.
\nM82 was slender and aligned east-northeast to west-southwest. The north side seemed to have the sharpest edge. There wasn’t a distinct nucleus, although it did brighten toward the middle axis. It was brightest just east of center. Its size seemed to be about 12′ x 3′. When I checked it at 120X (not sketched), it displayed an irregular mottled appearance.
\nFactoids:<\/b>
\nM81 is the brightest galaxy of the M81 group. A few tens of millions of years ago, M81 had a close interaction with its neighbor M82. M81’s spiral structure was effected, becoming more pronounced, as well as forming a dark linear feature northeast of the nuclear region. It’s distance is estimated at nearly 12 million light years. An unusual aspect of the galaxy is that it appears to have very little dark matter, as it’s rotational velocity drops off in its outer region much more than in most galaxies.
\nM82 lies about 150,000 light years north of M81. After its interaction with M81, M82’s core has entered a period of heavy starburst with conspicuous dark lanes. Over 100 young globular clusters have been discovered as likely results of this encounter. The explosive gas flow is a strong source of radio noise, which was discovered by Henbury Brown in 1953. M82 is also the brightest infrared galaxy in the sky. As with its companion, it lies nearly 12 million light years away.
\nBoth galaxies were discovered by Johann Elert Bode in 1774, rediscovered by Pierre M\u00e9chain in 1779 and cataloged by Charles Messier in 1781.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\nM81 (NGC 3031)
\nM82 (NGC 3034)<\/td>\n<\/tr>\n
Classification<\/b><\/td>\nM81: Spiral Galaxy – Type Sb
\nM82: Irregular Galaxy – Type Ir-II<\/td>\n<\/tr>\n
Position*<\/b><\/td>\nM81: Ursa Major [RA: 09:55.6 \/ Dec: +69:04]
\nM82: Ursa Major [RA: 09:55.8 \/ Dec: +69:41]<\/td>\n<\/tr>\n
Size*<\/b><\/td>\nM81: 21′ x 10′; M82: 9′ x 4′<\/td>\n<\/tr>\n
Brightness*<\/b><\/td>\nM81: 6.9; M82: 8.4<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\nFebruary 13, 2005 – 12:45 AM
\n(February 13, 2005 – 07:45 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>\n32 mm (37X); 10 mm (120X)<\/td>\n<\/tr>\n
Conditions<\/b><\/td>\nClear, 31\u00b0F, breezy<\/td>\n<\/tr>\n
Seeing<\/b><\/td>\n1-2\/10<\/td>\n<\/tr>\n
Transparency (NELM)<\/b><\/td>\nMag 5.8<\/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":"

M081<\/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":[16,28,18,19,29,21,66,15],"tags":[],"class_list":["post-109","post","type-post","status-publish","format-standard","hentry","category-deep-sky","category-galaxy","category-messier","category-sg-deep-sky","category-sg-galaxy","category-sg-messier","category-sgc-ursa-major","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":77,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/01\/15\/m65_and_m66\/","url_meta":{"origin":109,"position":0},"title":"Messier 65 and Messier 66","author":"jperez1690","date":"January 15, 2005","format":false,"excerpt":"M065","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":101,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/02\/04\/m96_m105_and_ng\/","url_meta":{"origin":109,"position":1},"title":"Messier 96, Messier 105 and NGC 3384","author":"jperez1690","date":"February 4, 2005","format":false,"excerpt":"M096","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":42,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/10\/09\/m77\/","url_meta":{"origin":109,"position":2},"title":"Messier 77","author":"jperez1690","date":"October 9, 2004","format":false,"excerpt":"M077","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":38,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/10\/04\/m32_satellite_o\/","url_meta":{"origin":109,"position":3},"title":"Messier 32 – Satellite of the Andromeda Galaxy","author":"jperez1690","date":"October 4, 2004","format":false,"excerpt":"M032","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":135,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/07\/09\/m63_the_sunflow\/","url_meta":{"origin":109,"position":4},"title":"Messier 63 – The Sunflower Galaxy","author":"jperez1690","date":"July 9, 2005","format":false,"excerpt":"M063","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":113,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/03\/10\/m95\/","url_meta":{"origin":109,"position":5},"title":"Messier 95","author":"jperez1690","date":"March 10, 2005","format":false,"excerpt":"M095","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\/109","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=109"}],"version-history":[{"count":1,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/109\/revisions"}],"predecessor-version":[{"id":708,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/109\/revisions\/708"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=109"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}