{"id":512,"date":"2009-12-08T22:31:58","date_gmt":"2009-12-08T22:31:58","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2009\/12\/08\/alpha_herculis\/"},"modified":"2009-12-08T22:31:58","modified_gmt":"2009-12-08T22:31:58","slug":"alpha_herculis","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2009\/12\/08\/alpha_herculis\/","title":{"rendered":"Alpha Herculis (Rasalgethi \/ Struve 2140)"},"content":{"rendered":"
\"Sketch<\/a><\/p>\n

Sketch of Alpha Herculis (Rasalgethi\/Struve 2140)<\/p>\n

Click image to view larger version.<\/i><\/p>\n<\/div>\n

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

Rasalgethi is a fantastic, colorful double. The bright primary shone a yellowish orange with–get ready for it–a sage green secondary. The diffraction pattern was captivating in better than normal seeing.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\nAlpha Herculis (Rasalgethi \/ STF 2140 \/ ADS 10418)<\/td>\n<\/tr>\n
Classification<\/b><\/td>\nDouble Star<\/td>\n<\/tr>\n
Position (J2000)*<\/b><\/td>\nHercules [RA: 17 14 38.9 \/ Dec: +14 23 25.2]<\/td>\n<\/tr>\n
Position Angle<\/b><\/td>\n111° [My Measurement 2009.3]
105° [WDS 2007]*<\/td>\n<\/tr>\n
Separation<\/b><\/td>\n6″ [My Measurement 2009.3]
4.8″ [WDS 2007]*<\/td>\n<\/tr>\n
Magnitudes*<\/b><\/td>\nA: 3.5; B: 5.4<\/td>\n<\/tr>\n
Spectral Types*<\/b><\/td>\nA: M5Iab; B: F2V<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\nAPR 5, 2009 – 3:45 AM (APR 5, 2008 – 10:45 UT)<\/td>\n<\/tr>\n
Observing Loc.<\/b><\/td>\nFlagstaff, AZ – Home<\/td>\n<\/tr>\n
Instrument<\/b><\/td>\nOrion SkyQuest XT8 Dobsonian (203 mm dia.\/1200 mm F\/L)<\/td>\n<\/tr>\n
Eyepieces\/Mag.<\/b><\/td>\nPentax XW10 + 2X Barlow (240X)
Meade Astrometric EP + 2X Barlow (200X)<\/td>\n<\/tr>\n
Conditions<\/b><\/td>\nClear, light breeze<\/td>\n<\/tr>\n
Seeing<\/b><\/td>\n7\/10 Pickering<\/td>\n<\/tr>\n
Transparency<\/b><\/td>\nMag 5.5 NELM<\/td>\n<\/tr>\n
*References<\/b><\/td>\nThe Washington Visual Double Star Catalog (Mason+ 2001-2009); Catalogue of Stellar Spectral Classifications (Skiff, 2009); SIMBAD<\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Alpha Herculis<\/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":[16,56,57,72,15],"tags":[],"class_list":["post-512","post","type-post","status-publish","format-standard","hentry","category-deep-sky","category-double-star","category-sg-double-star","category-sgc-hercules","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":508,"url":"https:\/\/perezmedia.net\/beltofvenus\/2009\/12\/02\/struve_2194\/","url_meta":{"origin":512,"position":0},"title":"Struve 2194","author":"jperez1690","date":"December 2, 2009","format":false,"excerpt":"Struve 2194","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":510,"url":"https:\/\/perezmedia.net\/beltofvenus\/2009\/12\/05\/xi_scorpius_str\/","url_meta":{"origin":512,"position":1},"title":"Xi Scorpii (Struve 1998) and Struve 1999","author":"jperez1690","date":"December 5, 2009","format":false,"excerpt":"Xi Scorpii","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":507,"url":"https:\/\/perezmedia.net\/beltofvenus\/2009\/12\/01\/struve_1369\/","url_meta":{"origin":512,"position":2},"title":"Struve 1369","author":"jperez1690","date":"December 1, 2009","format":false,"excerpt":"Struve 1369","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":511,"url":"https:\/\/perezmedia.net\/beltofvenus\/2009\/12\/06\/95_herculis_str\/","url_meta":{"origin":512,"position":3},"title":"95 Herculis (Struve 2264)","author":"jperez1690","date":"December 6, 2009","format":false,"excerpt":"95 Herculis","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":509,"url":"https:\/\/perezmedia.net\/beltofvenus\/2009\/12\/03\/struve_2259\/","url_meta":{"origin":512,"position":4},"title":"Struve 2259","author":"jperez1690","date":"December 3, 2009","format":false,"excerpt":"Struve 2259","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":506,"url":"https:\/\/perezmedia.net\/beltofvenus\/2009\/11\/30\/struve_1374\/","url_meta":{"origin":512,"position":5},"title":"Struve 1374","author":"jperez1690","date":"November 30, 2009","format":false,"excerpt":"Struve 1374","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":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/512","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=512"}],"version-history":[{"count":0,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/512\/revisions"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=512"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=512"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=512"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}