{"id":572,"date":"2011-07-28T00:24:30","date_gmt":"2011-07-28T00:24:30","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2011\/07\/28\/tau_and_83_leon\/"},"modified":"2011-07-28T00:24:30","modified_gmt":"2011-07-28T00:24:30","slug":"tau_and_83_leon","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2011\/07\/28\/tau_and_83_leon\/","title":{"rendered":"Tau and 83 Leonis (Struve-A 19 \/ Struve )"},"content":{"rendered":"
\"Sketch<\/a><\/p>\n

Sketch of Tau and 83 Leonis \/ Struve-A 19 and Struve 1540<\/p>\n

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

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

This striking double double consists of widely spaced, colorful Tau Leonis<\/a> (orange-yellow and blue) and 83 Leonis<\/a> (yellow and red-orange).<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\n\nTau Leonis (84 LEO \/ Struve-A 19 \/ STFA 19)
\n83 Leonis (Struve 1540 \/ STF 1540 \/ ADS 8162)\n<\/td>\n<\/tr>\n
Classification<\/b><\/td>\n\nDouble Star\n<\/td>\n<\/tr>\n
Position (J2000)*<\/b><\/td>\n\nLeo:
\nTau LEO: [RA: 11 27 56.2 \/ Dec: +02 51 22.6]
\n83 LEO: [RA: 11 26 45.3 \/ Dec: +03 00 47.2]\n<\/td>\n<\/tr>\n
Position Angle<\/b><\/td>\n\nTau LEO:
\nAB: 185° [My Measurement 2009.9]
\nAB: 181° [WDS 2004]*
\n83 LEO:
\nAB: 150° [My Measurement 2009.9]
\nAB: 150° [WDS 2008]*
\n<\/tr>\n<\/td>\n
Separation<\/b><\/td>\n\nTau LEO:
\nAB: 90″ [My Measurement 2009.9]
\nAB: 88.9″ [WDS 2004]*
\n83 LEO:
\nAB: 29″ [My Measurement 2009.9]
\nAB: 28.2″ [WDS 2008]*\n<\/td>\n<\/tr>\n
Magnitudes*<\/b><\/td>\n\nTau LEO: A: 5.1; B: 7.1
\n83 LEO: A: 6.6; B: 7.5\n<\/td>\n<\/tr>\n
Spectral Types*<\/b><\/td>\n\nTau LEO: A: G8II-III; B: G5
\n83 LEO: A: G7V; B: K4V\n<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\n\nNOV 27, 2009 – 5:05-5:15 AM MST (NOV 27, 2009 – 12:05-12:15 UT)\n<\/td>\n<\/tr>\n
Observing Loc.<\/b><\/td>\n\nFlagstaff, AZ – Home\n<\/td>\n<\/tr>\n
Instrument<\/b><\/td>\n\nOrion SkyQuest XT8 Dobsonian (203 mm dia.\/1200 mm F\/L)\n<\/td>\n<\/tr>\n
Eyepieces\/Mag.<\/b><\/td>\n\nPentax XW10 + 2X Barlow (240X)
Meade Astrometric EP + 2X Barlow (200X)<\/td>\n<\/tr>\n
Conditions<\/b><\/td>\n\nClear, cold, hazy\n<\/td>\n<\/tr>\n
Seeing<\/b><\/td>\n\n3-4\/10 Pickering\n<\/td>\n<\/tr>\n
Transparency<\/b><\/td>\n\nMag 5.5 NELM\n<\/td>\n<\/tr>\n
*References<\/b><\/td>\n\nThe Washington Visual Double Star Catalog (Mason+ 2001-2009); Catalogue of Stellar Spectral Classifications (Skiff, 2009); SIMBAD; Double Stars for Small Telescopes<\/i> – Sissy Haas\n<\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Tau LEO \/ 83 LEO<\/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":[56,57,53],"tags":[],"class_list":["post-572","post","type-post","status-publish","format-standard","hentry","category-double-star","category-sg-double-star","category-sgc-leo"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":570,"url":"https:\/\/perezmedia.net\/beltofvenus\/2011\/07\/27\/83_leonis_struv\/","url_meta":{"origin":572,"position":0},"title":"83 Leonis (Struve 1540)","author":"jperez1690","date":"July 27, 2011","format":false,"excerpt":"83 LEO","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":571,"url":"https:\/\/perezmedia.net\/beltofvenus\/2011\/07\/27\/tau_leonis_stru\/","url_meta":{"origin":572,"position":1},"title":"Tau Leonis (Struve-A 19)","author":"jperez1690","date":"July 27, 2011","format":false,"excerpt":"Tau LEO","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":573,"url":"https:\/\/perezmedia.net\/beltofvenus\/2011\/07\/28\/88_leonis_struv\/","url_meta":{"origin":572,"position":2},"title":"88 Leonis (Struve 1547)","author":"jperez1690","date":"July 28, 2011","format":false,"excerpt":"88 LEO","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":579,"url":"https:\/\/perezmedia.net\/beltofvenus\/2011\/07\/30\/iota_leonis_str\/","url_meta":{"origin":572,"position":3},"title":"Iota Leonis (Struve 1536)","author":"jperez1690","date":"July 30, 2011","format":false,"excerpt":"Iota LEO","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":535,"url":"https:\/\/perezmedia.net\/beltofvenus\/2010\/05\/09\/49_leonis_struv\/","url_meta":{"origin":572,"position":4},"title":"49 Leonis (Struve 1450 \/ TX LEO)","author":"jperez1690","date":"May 9, 2010","format":false,"excerpt":"49 LEO","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":528,"url":"https:\/\/perezmedia.net\/beltofvenus\/2010\/02\/28\/90_leonis_struv\/","url_meta":{"origin":572,"position":5},"title":"90 Leonis (Struve 1552)","author":"jperez1690","date":"February 28, 2010","format":false,"excerpt":"90 Leonis","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\/572","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=572"}],"version-history":[{"count":0,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/572\/revisions"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=572"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=572"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=572"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}