{"id":85,"date":"2005-01-17T22:25:20","date_gmt":"2005-01-17T22:25:20","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2005\/01\/17\/doublemultiple_5\/"},"modified":"2005-01-17T22:25:20","modified_gmt":"2005-01-17T22:25:20","slug":"doublemultiple_5","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2005\/01\/17\/doublemultiple_5\/","title":{"rendered":"Theta 1 Orionis (Struve 748) – The Trapezium"},"content":{"rendered":"


\nOctober 18, 2006: To help provide a consistent style for my double star sketches, the above sketch is a digital update to the original sketch.<\/i><\/p>\n

<\/p>\n

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

Even in poor seeing, the trapezium is spectacular. The A-D stars were simple to spot, with the C star being the brightest. I stared long enough that occasional moments of better seeing gave me a peek at the E star; but the F star wasn’t there at all.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\nDouble\/Multiple Star: Theta 1 Orion \/ 41-Ori [ALDS23]<\/td>\n<\/tr>\n
Classification<\/b><\/td>\nMultiple Star<\/td>\n<\/tr>\n
Position<\/b><\/td>\nOrion [RA: 05:35.3 \/ Dec: -05:23]*<\/td>\n<\/tr>\n
Separation*<\/b><\/td>\n8.8″,13″,21.5″<\/td>\n<\/tr>\n
Magnitudes*<\/b><\/td>\n6.7, 7.9, 5.1, 6.7<\/td>\n<\/tr>\n
Position Angle*<\/b><\/td>\n31\u00ef\u00bf\u00bd, 132\u00ef\u00bf\u00bd, 96\u00ef\u00bf\u00bd<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\n01\/17\/05 – 10:25 PM<\/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, cool (39\u00ef\u00bf\u00bdF), 1st quarter Moon<\/p>\n
Seeing<\/b><\/td>\n3\/10<\/td>\n<\/tr>\n
Transparency<\/b><\/td>\nMag 5.2<\/td>\n<\/tr>\n<\/table>\n

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

Theta 1 Orionis<\/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":[56,19,57,41,42,52,15],"tags":[],"class_list":["post-85","post","type-post","status-publish","format-standard","hentry","category-double-star","category-sg-deep-sky","category-sg-double-star","category-sg-emission-nebula","category-sg-nebula","category-sgc-orion","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":86,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/01\/17\/doublemultiple_6\/","url_meta":{"origin":85,"position":0},"title":"Theta 2 Orionis (Struve 16)","author":"jperez1690","date":"January 17, 2005","format":false,"excerpt":"Theta 2 Orionis","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":547,"url":"https:\/\/perezmedia.net\/beltofvenus\/2010\/10\/03\/destinations_al\/","url_meta":{"origin":85,"position":1},"title":"Destinations Along the Winter Milky Way","author":"jperez1690","date":"October 3, 2010","format":false,"excerpt":"Photograph of Winter Milky Way over Sunset Crater with sketches of deep sky objects in the area. Move mouse over sketch above to see where each deep sky object resides. Click image for larger version. Click here for larger version without call-out lines. . . . . . Other Print\u2026","rel":"","context":"In "Astro Photography"","block_context":{"text":"Astro Photography","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/astro-photography\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":295,"url":"https:\/\/perezmedia.net\/beltofvenus\/2010\/01\/22\/m42_the_orion_n\/","url_meta":{"origin":85,"position":2},"title":"Messier 42 and Messier 43 (The Orion Nebula)","author":"jperez1690","date":"January 22, 2010","format":false,"excerpt":"M042","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":81,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/01\/16\/doublemultiple_1\/","url_meta":{"origin":85,"position":3},"title":"Delta Orionis (Struve 14)","author":"jperez1690","date":"January 16, 2005","format":false,"excerpt":"Delta Orionis","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":87,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/01\/17\/doublemultiple_7\/","url_meta":{"origin":85,"position":4},"title":"Iota Orionis (Struve 752)","author":"jperez1690","date":"January 17, 2005","format":false,"excerpt":"Iota Orionis","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":80,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/01\/16\/doublemultiple\/","url_meta":{"origin":85,"position":5},"title":"Lambda Orionis (Struve 738)","author":"jperez1690","date":"January 16, 2005","format":false,"excerpt":"Lambda Orionis","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\/85","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=85"}],"version-history":[{"count":0,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/85\/revisions"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=85"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=85"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=85"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}