{"id":320,"date":"2007-02-28T22:43:53","date_gmt":"2007-02-28T22:43:53","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2007\/02\/28\/24_comae_bereni\/"},"modified":"2007-02-28T22:43:53","modified_gmt":"2007-02-28T22:43:53","slug":"24_comae_bereni","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2007\/02\/28\/24_comae_bereni\/","title":{"rendered":"24 Comae Berenices (Struve 1657)"},"content":{"rendered":"

<\/a>
Click above image for larger version<\/i><\/p>\n

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

This widely spaced double in Coma Berenices is a real showpiece, particularly when seeing conditions are good. The primary is a deep yellow-orange in color with a rich blue secondary hovering to the west. The steadily shimmering diffraction rings made them look like colorful gemstones resting in their settings. I estimated a position angle of 280 degrees and a separation of 20 – 25 arc seconds. The values listed in the Washington Double Star Catalog from 1830 are 271 degrees and 20.3 arc seconds. I’m including a ‘frozen’ detail image in the sketch to convey what this effect looked like.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\n24 Comae Berenices (STF 1657)<\/b><\/td>\n<\/tr>\n
Classification<\/b><\/td>\nDouble Star<\/td>\n<\/tr>\n
Position (J2000)<\/b><\/td>\nComa Berenices [RA: 12:35:07.7 \/ Dec: +18:22:37]*<\/td>\n<\/tr>\n
Position Angle*<\/b><\/td>\n271\u00c2\u00b0 (1830)<\/td>\n<\/tr>\n
Separation*<\/b><\/td>\n20.3″ (1830)<\/td>\n<\/tr>\n
Magnitudes*<\/b><\/td>\n5.2; 6.7<\/td>\n<\/tr>\n
Spectral Types*<\/b><\/td>\nK0; A3<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\nJAN 26, 2007 – 06:20 AM MST (JAN 26, 2007 – 13:20 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 + 2X Barlow (240X)<\/td>\n<\/tr>\n
Conditions<\/b><\/td>\nClear, calm, 18\u00c2\u00b0 F<\/td>\n<\/tr>\n
Seeing<\/b><\/td>\n6\/10 Pickering<\/td>\n<\/tr>\n
Transparency<\/b><\/td>\nNELM Mag ~5.8<\/td>\n<\/tr>\n
References<\/b><\/td>\nThe Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996); Visual Double Stars in Hipparcos (Dommanget+, 2000)<\/td>\n<\/tr>\n<\/table>\n

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

24 Comae Berenices<\/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":[56,57,89,15],"tags":[],"class_list":["post-320","post","type-post","status-publish","format-standard","hentry","category-double-star","category-sg-double-star","category-sgc-coma-berenices","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":534,"url":"https:\/\/perezmedia.net\/beltofvenus\/2010\/05\/09\/2_comae_berenic\/","url_meta":{"origin":320,"position":0},"title":"2 Comae Berenices (Struve 1596)","author":"jperez1690","date":"May 9, 2010","format":false,"excerpt":"02 COM","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":14,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/08\/01\/double_star_ske\/","url_meta":{"origin":320,"position":1},"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":476,"url":"https:\/\/perezmedia.net\/beltofvenus\/2009\/05\/29\/messier_98_ngc\/","url_meta":{"origin":320,"position":2},"title":"Messier 98 (NGC 4192)","author":"jperez1690","date":"May 29, 2009","format":false,"excerpt":"M098","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":486,"url":"https:\/\/perezmedia.net\/beltofvenus\/2009\/09\/20\/m88_ngc_4501\/","url_meta":{"origin":320,"position":3},"title":"Messier 88 (NGC 4501)","author":"jperez1690","date":"September 20, 2009","format":false,"excerpt":"M088","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":471,"url":"https:\/\/perezmedia.net\/beltofvenus\/2009\/05\/06\/messier_99\/","url_meta":{"origin":320,"position":4},"title":"Messier 99 (NGC 4254)","author":"jperez1690","date":"May 6, 2009","format":false,"excerpt":"M099","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":484,"url":"https:\/\/perezmedia.net\/beltofvenus\/2009\/09\/07\/m85_ngc_4382_an\/","url_meta":{"origin":320,"position":5},"title":"Messier 85 (NGC 4382) and NGC 4394","author":"jperez1690","date":"September 7, 2009","format":false,"excerpt":"M085","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\/320","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=320"}],"version-history":[{"count":0,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/320\/revisions"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}