{"id":305,"date":"2006-12-02T22:18:26","date_gmt":"2006-12-02T22:18:26","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2006\/12\/02\/54_leonis_struv\/"},"modified":"2006-12-02T22:18:26","modified_gmt":"2006-12-02T22:18:26","slug":"54_leonis_struv","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2006\/12\/02\/54_leonis_struv\/","title":{"rendered":"54 Leonis (Struve 1487)"},"content":{"rendered":"

<\/p>\n

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

54 Leonis showed a beautiful color combination to my eye. The primary appeared as a pale blue-green next to a deep blue secondary. Once again, I’m seeing a greenish contrast effect on a primary instead of the secondary. What can I say? I’m still trying to figure it out. The stars appeared to be separated by about 4 first-diffraction-ring radii, or 5 arcseconds for my scope. The 1987 WDS value is actually 6.5 arcseconds. My PA estimate was 110 degrees, which lines up nicely with the 1987 WDS value of…are you ready…110 degrees. Ka-bam. Every once in a while, I guess. <\/p>\n

Just wait ’til I get an astrometric eyepiece involved in this \ud83d\ude09<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\n54 Leonis (STF 1487)<\/td>\n<\/tr>\n
Classification<\/b><\/td>\nDouble Star<\/td>\n<\/tr>\n
Position (J2000)<\/b><\/td>\n[RA: 10:55:36.7 \/ Dec: +24:44:58]*<\/td>\n<\/tr>\n
Position Angle*<\/b><\/td>\n103\u00c2\u00b0 (1830)
110\u00c2\u00b0 (1987)<\/td>\n<\/tr>\n
Separation*<\/b><\/td>\n6.2″ (1830)
6.5″ (1987)<\/td>\n<\/tr>\n
Magnitudes*<\/b><\/td>\nA = 4.5; B = 6.3<\/td>\n<\/tr>\n
Spectral Types*<\/b><\/td>\nA = A1V; B = A2Vn<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\nOCT 22, 2006 – 04:35 AM MST (OCT 22, 2006 – 11:35 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>\nClear, calm<\/p>\n
Seeing<\/b><\/td>\n5\/10<\/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) via VizieR<\/a><\/td>\n<\/tr>\n<\/table>\n

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

54 Leonis<\/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":[56,57,53,15],"tags":[],"class_list":["post-305","post","type-post","status-publish","format-standard","hentry","category-double-star","category-sg-double-star","category-sgc-leo","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":304,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/12\/02\/gamma_leonis_al\/","url_meta":{"origin":305,"position":0},"title":"Gamma Leonis (Algieba \/ Struve 1424)","author":"jperez1690","date":"December 2, 2006","format":false,"excerpt":"Gamma 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":[]},{"id":570,"url":"https:\/\/perezmedia.net\/beltofvenus\/2011\/07\/27\/83_leonis_struv\/","url_meta":{"origin":305,"position":1},"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":573,"url":"https:\/\/perezmedia.net\/beltofvenus\/2011\/07\/28\/88_leonis_struv\/","url_meta":{"origin":305,"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":571,"url":"https:\/\/perezmedia.net\/beltofvenus\/2011\/07\/27\/tau_leonis_stru\/","url_meta":{"origin":305,"position":3},"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":528,"url":"https:\/\/perezmedia.net\/beltofvenus\/2010\/02\/28\/90_leonis_struv\/","url_meta":{"origin":305,"position":4},"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":[]},{"id":572,"url":"https:\/\/perezmedia.net\/beltofvenus\/2011\/07\/28\/tau_and_83_leon\/","url_meta":{"origin":305,"position":5},"title":"Tau and 83 Leonis (Struve-A 19 \/ Struve )","author":"jperez1690","date":"July 28, 2011","format":false,"excerpt":"Tau LEO \/ 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":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/305","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=305"}],"version-history":[{"count":0,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/305\/revisions"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=305"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=305"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}