{"id":337,"date":"2007-07-13T00:56:28","date_gmt":"2007-07-13T00:56:28","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2007\/07\/13\/zeta_coronae_bo\/"},"modified":"2007-07-13T00:56:28","modified_gmt":"2007-07-13T00:56:28","slug":"zeta_coronae_bo","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2007\/07\/13\/zeta_coronae_bo\/","title":{"rendered":"Zeta Coronae Borealis (Struve 1965)"},"content":{"rendered":"

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

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

This bright double in Corona Borealis provided me with a huge challenge when it came to determining the color of the primary star. At first it appeared cyan, then white, then lime green, before settling at what seemed like pale yellow. Seeing was not that bad, but the color wouldn’t cooperate. It is a B6V star, so it should appear blue. The secondary did appear as a firm blue, which is appropriate for a B7V star. I estimated PA at 304\u00c2\u00b0 and the actual value is 301\u00c2\u00b0. The stars were separated by the radius of 5 diffraction rings, which works out to 6.2 arcseconds for my telescope. The WDS catalog value is 6 arcseconds.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\nZeta Coronae Borealis (STF 1965)<\/b><\/td>\n<\/tr>\n
Classification<\/b><\/td>\nDouble Star<\/td>\n<\/tr>\n
Position (J2000)<\/b><\/td>\nCorona Borealis [RA: 15:39:22.2 \/ Dec: +36:38:12]*<\/td>\n<\/tr>\n
Position Angle*<\/b><\/td>\n301\u00c2\u00b0 (1822)<\/td>\n<\/tr>\n
Separation*<\/b><\/td>\n6″ (1822)<\/td>\n<\/tr>\n
Magnitudes*<\/b><\/td>\n5.1 \/ 6.0<\/td>\n<\/tr>\n
Spectral Types*<\/b><\/td>\nB6V \/ B7V<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\nAPR 29, 2007 – 01:00 AM MST (APR 29, 2007 – 08:00 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); Stellar Spectra Classified in Morgan-Keenan System (Jaschek+ 1964); Brian Workman’s Double Star Calculator<\/td>\n<\/tr>\n<\/table>\n

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

Zeta 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-337","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":338,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/07\/14\/sigma_coronae_b\/","url_meta":{"origin":337,"position":0},"title":"Sigma Coronae Borealis (Struve 2032)","author":"jperez1690","date":"July 14, 2007","format":false,"excerpt":"Sigma 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":337,"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":246,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/04\/21\/comet_73pschwas_2\/","url_meta":{"origin":337,"position":2},"title":"73P\/Schwassmann-Wachmann 3-B and -C – April 21, 2006","author":"jperez1690","date":"April 21, 2006","format":false,"excerpt":"73P\/Schwassmann-Wachmann 3 20060421","rel":"","context":"In "Comet"","block_context":{"text":"Comet","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/comet\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":335,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/07\/01\/delta_bootis_st\/","url_meta":{"origin":337,"position":3},"title":"Delta Boötis (Struve 27)","author":"jperez1690","date":"July 1, 2007","format":false,"excerpt":"Delta BOO","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":325,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/04\/25\/tau1_hydrae_hj\/","url_meta":{"origin":337,"position":4},"title":"Tau-1 Hydrae (HJ 1167)","author":"jperez1690","date":"April 25, 2007","format":false,"excerpt":"Tau1 Hydrae","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":337,"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\/337","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=337"}],"version-history":[{"count":0,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/337\/revisions"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=337"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=337"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}