{"id":339,"date":"2007-07-14T16:52:36","date_gmt":"2007-07-14T16:52:36","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2007\/07\/14\/4_centauri_hers\/"},"modified":"2007-07-14T16:52:36","modified_gmt":"2007-07-14T16:52:36","slug":"4_centauri_hers","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2007\/07\/14\/4_centauri_hers\/","title":{"rendered":"4 Centauri (Herschel 51)"},"content":{"rendered":"

<\/p>\n

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

After a blustery evening attempting to observe at Cinder Hills Overlook (Sunset Crater National Monument), I gave 4 Centauri a try. At low power, this double appeared to have a cream colored primary and a blue-gray secondary. At 240X however, the color of the primary appeared to be an aqua color instead. I checked with Eric Graff, who was observing with me through the relentless gusts, and he noticed the same high power vs low power color effect on this double through his scope (a 6″ f\/6 Parks Astrolight). PA appeared to be 190\u00c2\u00b0 with a separation of 20 arcseconds. WDS values are 185\u00c2\u00b0 and 14.9 arcseconds. Spectral types are B5V \/ A3V, so the high power view was the most accurate for color estimation. <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\n4 Centauri (H 51)<\/b><\/td>\n<\/tr>\n
Classification<\/b><\/td>\nDouble Star<\/td>\n<\/tr>\n
Position (J2000)<\/b><\/td>\nCentaurus [RA: 13:53:12.5 \/ Dec: -31:55:39]*<\/td>\n<\/tr>\n
Position Angle*<\/b><\/td>\n185\u00c2\u00b0<\/td>\n<\/tr>\n
Separation*<\/b><\/td>\n14.9″<\/td>\n<\/tr>\n
Magnitudes*<\/b><\/td>\n4.78 \/ 8.45<\/td>\n<\/tr>\n
Spectral Types*<\/b><\/td>\nB5V \/ A3V<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\nMAY 11, 2007 – 09:45 PM MST (MAY 12, 2007 – 04:45 UT)<\/td>\n<\/tr>\n
Observing Loc.<\/b><\/td>\nCinder Hills Overlook, Sunset Crater National Monument, AZ<\/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, gusty winds<\/td>\n<\/tr>\n
Seeing<\/b><\/td>\n3\/10 Pickering<\/td>\n<\/tr>\n
Transparency<\/b><\/td>\nNELM Mag ~6.8<\/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":"

04 Centauri<\/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":[56,57,99,15],"tags":[],"class_list":["post-339","post","type-post","status-publish","format-standard","hentry","category-double-star","category-sg-double-star","category-sgc-centaurus","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":317,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/02\/05\/3_centauri\/","url_meta":{"origin":339,"position":0},"title":"3 Centauri","author":"jperez1690","date":"February 5, 2007","format":false,"excerpt":"03 Centauri","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":410,"url":"https:\/\/perezmedia.net\/beltofvenus\/2008\/06\/22\/omega_centauri\/","url_meta":{"origin":339,"position":1},"title":"NGC 5139 – Omega Centauri","author":"jperez1690","date":"June 22, 2008","format":false,"excerpt":"NGC 5139 - Omega Centauri","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":14,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/08\/01\/double_star_ske\/","url_meta":{"origin":339,"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":337,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/07\/13\/zeta_coronae_bo\/","url_meta":{"origin":339,"position":3},"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":338,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/07\/14\/sigma_coronae_b\/","url_meta":{"origin":339,"position":4},"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":335,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/07\/01\/delta_bootis_st\/","url_meta":{"origin":339,"position":5},"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":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/339","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=339"}],"version-history":[{"count":0,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/339\/revisions"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=339"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=339"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=339"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}