{"id":434,"date":"2008-10-05T21:22:57","date_gmt":"2008-10-05T21:22:57","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2008\/10\/05\/iota_bootis_str\/"},"modified":"2008-10-05T21:22:57","modified_gmt":"2008-10-05T21:22:57","slug":"iota_bootis_str","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2008\/10\/05\/iota_bootis_str\/","title":{"rendered":"Iota Bootis (Struve 26)"},"content":{"rendered":"

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

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

I think Boötes is my favorite constellation for doubles. Iota Boötis is not one of the showstoppers, but it’s still an enjoyable color tester. At low power, I saw the primary as yellow with a dull blue secondary. At high power, the colors swapped places on me from time to time. The primary is an A class star and the secondary is a K star. So the blue secondary is another nice little visual mystery. Other observers have perceived some interesting colors.<\/p>\n

Jeff Burton<\/a> noted Yellow\/Blue<\/p>\n

Observers at the 33 Doubles Observing Project<\/a> noted–
\nTim Leese: Off-White\/Pale Yellow
\nCor Berrevoets: Greenish-White\/White
\nMary Flanagan: Greenish-Yellow\/Intense Blue
\nJim Jones: Yellow primary<\/p>\n

Jeff Verona<\/a> saw Yellowish-White\/Blue\n<\/p>\n

I measured PA and separation at 32° and 38″. The Washington Double Star measurements from 1820 listed 33° and 38.5″. I was not looking for, nor did I notice the 12.6 magnitude C star.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\nIota Bootis (STF 26)<\/td>\n<\/tr>\n
Classification<\/b><\/td>\nMultiple Star<\/td>\n<\/tr>\n
Position (J2000)<\/b><\/td>\nBootes [RA: 14:16:09.9 \/ Dec: +51:22:02]*<\/td>\n<\/tr>\n
Position Angle*<\/b><\/td>\n\nA-B: 32° [2008.3 my measurement]; 33° [1820 WDS]
\nA-C: 197° [1911 WDS]<\/td>\n<\/tr>\n
Separation*<\/b><\/td>\n\nA-B: 38″ [2008.3 my measurement]; 38.5″ [1820 WDS]
\nA-C: 85.9″ [1911 WDS]<\/td>\n<\/tr>\n
Magnitudes*<\/b><\/td>\nA: 4.75; B: 8.23; C: 12.6<\/td>\n<\/tr>\n
Spectral Types*<\/b><\/td>\nA: A7IV; B: K0V<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\nAPR 10, 2008 – 11:30 PM MST (APR 11, 2008 – 06:30 UT)<\/td>\n<\/tr>\n
Observing Loc.<\/b><\/td>\nFlagstaff, Arizona, USA – Home<\/td>\n<\/tr>\n
Instrument<\/b><\/td>\nOrion Skyview Pro 6LT (150 mm dia.\/1200 mm F\/L)<\/td>\n<\/tr>\n
Eyepieces\/Mag.<\/b><\/td>\n10 mm Sirius Pl\u00f6ssl + 2X Barlow (240X)
12 mm Meade Astrometric EP + 2X Barlow (200X)<\/td>\n<\/tr>\n
Conditions<\/b><\/td>\nClear, cold<\/td>\n<\/tr>\n
Seeing<\/b><\/td>\n6\/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); Catalogue of Stellar Spectral Classifications (Skiff, 2007)<\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Iota Bootis<\/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":[56,57,93,15],"tags":[],"class_list":["post-434","post","type-post","status-publish","format-standard","hentry","category-double-star","category-sg-double-star","category-sgc-botes","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":290,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/09\/25\/kappa_bootis_st\/","url_meta":{"origin":434,"position":0},"title":"Kappa Boötis (Struve 1821)","author":"jperez1690","date":"September 25, 2006","format":false,"excerpt":"Kappa 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":278,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/09\/03\/xi_bootis_struv\/","url_meta":{"origin":434,"position":1},"title":"Xi Bootis (Struve 1888)","author":"jperez1690","date":"September 3, 2006","format":false,"excerpt":"Xi 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":277,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/09\/03\/pi_bootis_struv\/","url_meta":{"origin":434,"position":2},"title":"Pi Boötis (Struve 1864)","author":"jperez1690","date":"September 3, 2006","format":false,"excerpt":"Pi 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":279,"url":"https:\/\/perezmedia.net\/beltofvenus\/2012\/06\/11\/epsilon_bootis\/","url_meta":{"origin":434,"position":3},"title":"Epsilon Bootis (Izar \/ Struve 1877)","author":"jperez1690","date":"June 11, 2012","format":false,"excerpt":"Epsilon Bootis","rel":"","context":"In "Double Star"","block_context":{"text":"Double Star","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/double-star\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/perezmedia.net\/beltofvenus\/wp-content\/uploads\/2012\/06\/img2012052901_EpsilonBOO_md-e1703478663654.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":14,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/08\/01\/double_star_ske\/","url_meta":{"origin":434,"position":4},"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":276,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/09\/03\/zeta_bootis_str\/","url_meta":{"origin":434,"position":5},"title":"Zeta Boötis (Struve 1865)","author":"jperez1690","date":"September 3, 2006","format":false,"excerpt":"Zeta 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\/434","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=434"}],"version-history":[{"count":0,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/434\/revisions"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=434"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=434"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}