{"id":338,"date":"2007-07-14T00:53:31","date_gmt":"2007-07-14T00:53:31","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2007\/07\/14\/sigma_coronae_b\/"},"modified":"2007-07-14T00:53:31","modified_gmt":"2007-07-14T00:53:31","slug":"sigma_coronae_b","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2007\/07\/14\/sigma_coronae_b\/","title":{"rendered":"Sigma Coronae Borealis (Struve 2032)"},"content":{"rendered":"

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

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

Sigma Coronae Borealis was a beautiful multiple star. The primary was a rich yellow with a reddish purple secondary right next to it. A third component (the D star) lingered to the east. The two closest stars, A and B, were separated by the radius of 6 diffraction rings. This works out to 7.4 arcseconds. The 2007.3 value from Brian Workman’s double star calculator yields a separation of 7.15 arcseconds. I did not spot the C component, a 13th magnitude star 21 arcseconds to the west.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\nSigma Coronae Borealis (STF 2032)<\/b><\/td>\n<\/tr>\n
Classification<\/b><\/td>\nMultiple Star<\/td>\n<\/tr>\n
Position (J2000)<\/b><\/td>\nCorona Borealis [RA: 16:14:40.6 \/ Dec: +33:51:30]*<\/td>\n<\/tr>\n
Position Angle*<\/b><\/td>\nAB: 237.1\u00c2\u00b0 (2007.3) \/ AC: 234\u00c2\u00b0 (1851) \/ AD: 89\u00c2\u00b0 (1836)<\/td>\n<\/tr>\n
Separation*<\/b><\/td>\nAB: 7.15″ (2007.3) \/ AC: 21.2″ (1851) \/ AD: 43.8″ (1836)<\/td>\n<\/tr>\n
Magnitudes*<\/b><\/td>\nA: 5.8 \/ B: 6.7 \/ C: 13.3 \/ D: 10.8<\/td>\n<\/tr>\n
Spectral Types*<\/b><\/td>\n–<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\nAPR 29, 2007 – 01:50 AM MST (APR 29, 2007 – 08:50 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>\nMostly clear, slightly breezy, nearly full moon<\/td>\n<\/tr>\n
Seeing<\/b><\/td>\n5-6\/10 Pickering<\/td>\n<\/tr>\n
Transparency<\/b><\/td>\nNELM Mag ~5.0<\/td>\n<\/tr>\n
References<\/b><\/td>\nThe Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996); Brian Workman’s Double Star Calculator<\/td>\n<\/tr>\n<\/table>\n

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

Sigma Coronae Borealis<\/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":[56,57,108,15],"tags":[],"class_list":["post-338","post","type-post","status-publish","format-standard","hentry","category-double-star","category-sg-double-star","category-sgc-corona-borealis","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":337,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/07\/13\/zeta_coronae_bo\/","url_meta":{"origin":338,"position":0},"title":"Zeta Coronae Borealis (Struve 1965)","author":"jperez1690","date":"July 13, 2007","format":false,"excerpt":"Zeta Coronae Borealis","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":329,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/05\/17\/40_41_draconis\/","url_meta":{"origin":338,"position":1},"title":"40, 41 Draconis (Struve 2308)","author":"jperez1690","date":"May 17, 2007","format":false,"excerpt":"40, 41 Draconis","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":338,"position":2},"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":[]},{"id":307,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/12\/03\/32_camelopardal\/","url_meta":{"origin":338,"position":3},"title":"32 Camelopardalis (Struve 1694)","author":"jperez1690","date":"December 3, 2006","format":false,"excerpt":"32 Camelopardalis","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":304,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/12\/02\/gamma_leonis_al\/","url_meta":{"origin":338,"position":4},"title":"Gamma Leonis (Algieba \/ Struve 1424)","author":"jperez1690","date":"December 2, 2006","format":false,"excerpt":"Gamma Leonis","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":306,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/12\/03\/xi_ursae_majori\/","url_meta":{"origin":338,"position":5},"title":"Xi Ursae Majoris (Struve 1523)","author":"jperez1690","date":"December 3, 2006","format":false,"excerpt":"Xi Ursae Majoris","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\/338","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=338"}],"version-history":[{"count":0,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/338\/revisions"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=338"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}