{"id":333,"date":"2007-06-15T23:36:46","date_gmt":"2007-06-15T23:36:46","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2007\/06\/15\/mu_crucis_dun_1\/"},"modified":"2007-06-15T23:36:46","modified_gmt":"2007-06-15T23:36:46","slug":"mu_crucis_dun_1","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2007\/06\/15\/mu_crucis_dun_1\/","title":{"rendered":"Mu Crucis (DUN 126)"},"content":{"rendered":"

<\/p>\n

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

While enjoying the view<\/a> from the summit of Haleakala on Maui, I was able to make a binocular observation of the wide double, Mu Crucis. This wide double was a nice binocular target and was only difficult to split when the wind was shaking my lightweight tripod. The primary was bright blue and the secondary appeared to be an elusive orange color. This must have been a contrast effect, since the secondary is a B5 star. This is as far south as I’ll be getting on a double star for a good long while: -57\u00c2\u00b0 declination is 2 degrees below the horizon in Flagstaff, and about ten degrees below a useful altitude from here.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\nMu Crucis (DUN 126)<\/b><\/td>\n<\/tr>\n
Classification<\/b><\/td>\nDouble Star<\/td>\n<\/tr>\n
Position (J2000)<\/b><\/td>\nCrux [RA: 12:54:35.5 \/ Dec: -57:10:40]*<\/td>\n<\/tr>\n
Position Angle*<\/b><\/td>\n17\u00c2\u00b0 (1826)<\/td>\n<\/tr>\n
Separation*<\/b><\/td>\n34.9″ (1826)<\/td>\n<\/tr>\n
Magnitudes*<\/b><\/td>\nA: 4.03 \/ B: 5.17<\/td>\n<\/tr>\n
Spectral Types*<\/b><\/td>\nB3 \/ B5<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\nJUN 3, 2007 – 9:30 AM HADT (JUN 4, 2007 – 10:30 UT)<\/td>\n<\/tr>\n
Observing Loc.<\/b><\/td>\nHaleakala Summit, Maui, HI (10,000 ft.)<\/td>\n<\/tr>\n
Instrument<\/b><\/td>\nOberwerk 15 x 70 Binoculars<\/td>\n<\/tr>\n
Eyepieces\/Mag.<\/b><\/td>\n15X<\/td>\n<\/tr>\n
Conditions<\/b><\/td>\nClear, cool, Breezy<\/td>\n<\/tr>\n
Seeing<\/b><\/td>\n–<\/td>\n<\/tr>\n
Transparency<\/b><\/td>\nNELM Mag ~6.5<\/td>\n<\/tr>\n
References<\/b><\/td>\nThe Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996); Catalogue of Stellar Spectral Classifications (Skiff, 2005)<\/td>\n<\/tr>\n<\/table>\n

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

Mu Crucis<\/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":[56,57,106,15],"tags":[],"class_list":["post-333","post","type-post","status-publish","format-standard","hentry","category-double-star","category-sg-double-star","category-sgc-crux","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":332,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/06\/12\/crux\/","url_meta":{"origin":333,"position":0},"title":"Crux","author":"jperez1690","date":"June 12, 2007","format":false,"excerpt":"Crux","rel":"","context":"In "Constellation"","block_context":{"text":"Constellation","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/constellation\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":430,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/08\/01\/binocular_sketc\/","url_meta":{"origin":333,"position":1},"title":"Binocular Sketches","author":"jperez1690","date":"August 1, 2004","format":false,"excerpt":"Binocular Sketches","rel":"","context":"In "Gallery"","block_context":{"text":"Gallery","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/gallery\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":14,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/08\/01\/double_star_ske\/","url_meta":{"origin":333,"position":2},"title":"Double Star Sketches","author":"jperez1690","date":"August 1, 2004","format":false,"excerpt":"Double Star Sketches","rel":"","context":"In "General"","block_context":{"text":"General","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/general\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":64,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/12\/06\/astro_and_lunar\/","url_meta":{"origin":333,"position":3},"title":"Observation Record Forms and Templates","author":"jperez1690","date":"December 6, 2004","format":false,"excerpt":"Observation Record Sheets","rel":"","context":"In "Tools and Techniques"","block_context":{"text":"Tools and Techniques","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/tools-and-techniques\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":328,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/04\/30\/gamma_velorum_d\/","url_meta":{"origin":333,"position":4},"title":"Gamma Velorum (Dunlop 65)","author":"jperez1690","date":"April 30, 2007","format":false,"excerpt":"Gamma Velorum","rel":"","context":"In "Double Star"","block_context":{"text":"Double Star","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/double-star\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":336,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/07\/12\/mu_bootis\/","url_meta":{"origin":333,"position":5},"title":"Mu Bootis (Struve 28 \/ 1938)","author":"jperez1690","date":"July 12, 2007","format":false,"excerpt":"Mu Bootis","rel":"","context":"In "Double Star"","block_context":{"text":"Double Star","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/double-star\/"},"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\/333","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=333"}],"version-history":[{"count":0,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/333\/revisions"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=333"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}