{"id":301,"date":"2006-11-28T23:15:45","date_gmt":"2006-11-28T23:15:45","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2006\/11\/28\/zeta_cancri_str\/"},"modified":"2006-11-28T23:15:45","modified_gmt":"2006-11-28T23:15:45","slug":"zeta_cancri_str","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2006\/11\/28\/zeta_cancri_str\/","title":{"rendered":"Zeta Cancri (Struve 1196)"},"content":{"rendered":"

<\/p>\n

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

This was a great triple star. The central diffraction discs of the A and B components appeared to just touch at a position angle of about 68 degrees, which works out to a separation of about .9 arc seconds. These 2 stars were pale yellow in color and seemed so close in magnitude that I couldn’t tell which was the primary (which meant a PA of either 68 or 248 degrees until I researched the correct designation of primary). The third star appeared fainter, paler yellow, and at a position angle of 75 degrees. It was separated from the B star by about 4 diffraction ring radii, which works out to a separation from the A star of about 6 arc seconds. Actual values can be seen in the table below.<\/p>\n

It appears that the A and B stars have a fairly fast orbital period with a PA of 152.7 degrees in 1991, 110.9\u00c2\u00b0 in 1998, and my estimate of 68 degrees in 2006<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Subject<\/b><\/td>\nZeta Cancri (STF 1196)<\/td>\n<\/tr>\n
Classification<\/b><\/td>\nMultiple Star<\/td>\n<\/tr>\n
Position (J2000)<\/b><\/td>\n[RA: 08:12:12.7 \/ Dec: +17:38:52]*<\/td>\n<\/tr>\n
Position Angle*<\/b><\/td>\nAB=152.7\u00c2\u00b0 (1991)
AB=110.9\u00c2\u00b0 (1998)
AC=78\u00c2\u00b0 (1991)<\/td>\n<\/tr>\n
Separation*<\/b><\/td>\nAB=.92″ (1991)
AB=.7″ (1998)
AC=6.17″<\/td>\n<\/tr>\n
Magnitudes*<\/b><\/td>\nA=5.3; B=6.2; C=5.9<\/td>\n<\/tr>\n
Spectral Types*<\/b><\/td>\nA=F8V; B=F9V; C=G5V<\/td>\n<\/tr>\n
Date\/Time<\/b><\/td>\nOCT 22, 2006 – 3:40 AM MST (OCT 22, 2006 – 10:40 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), Tycho Double Star Catalogue (TDSC) (Fabricius+ 2002), Double stars measurements (Alzner 1998), and Spectrophotometric Catalogue of Stars (Kharitonov+, 1988) via VizieR<\/a><\/td>\n<\/tr>\n<\/table>\n

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

Zeta Cancri<\/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":[56,57,55,15],"tags":[],"class_list":["post-301","post","type-post","status-publish","format-standard","hentry","category-double-star","category-sg-double-star","category-sgc-cancer","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":362,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/09\/24\/36_andromedae_s\/","url_meta":{"origin":301,"position":0},"title":"36 Andromedae (Struve 73)","author":"jperez1690","date":"September 24, 2007","format":false,"excerpt":"36 Andromedae","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":401,"url":"https:\/\/perezmedia.net\/beltofvenus\/2008\/04\/13\/gamma_virginis\/","url_meta":{"origin":301,"position":1},"title":"Gamma Virginis (Porrima \/ Struve 1670)","author":"jperez1690","date":"April 13, 2008","format":false,"excerpt":"Gamma Virginis","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":451,"url":"https:\/\/perezmedia.net\/beltofvenus\/2008\/12\/26\/12_lyncis_struv\/","url_meta":{"origin":301,"position":2},"title":"12 Lyncis (Struve 948)","author":"jperez1690","date":"December 26, 2008","format":false,"excerpt":"12 Lyncis","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":366,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/09\/30\/65_piscium_stru\/","url_meta":{"origin":301,"position":3},"title":"65 Piscium (Struve 61)","author":"jperez1690","date":"September 30, 2007","format":false,"excerpt":"65 Piscium","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":320,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/02\/28\/24_comae_bereni\/","url_meta":{"origin":301,"position":4},"title":"24 Comae Berenices (Struve 1657)","author":"jperez1690","date":"February 28, 2007","format":false,"excerpt":"24 Comae Berenices","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":364,"url":"https:\/\/perezmedia.net\/beltofvenus\/2007\/09\/25\/alpha_piscium_s\/","url_meta":{"origin":301,"position":5},"title":"Alpha Piscium (Struve 202)","author":"jperez1690","date":"September 25, 2007","format":false,"excerpt":"Alpha Piscium","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\/301","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=301"}],"version-history":[{"count":0,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/301\/revisions"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=301"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=301"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}