{"id":505,"date":"2009-11-14T15:25:00","date_gmt":"2009-11-14T15:25:00","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2009\/11\/14\/beta_monoceroti\/"},"modified":"2009-11-14T15:25:00","modified_gmt":"2009-11-14T15:25:00","slug":"beta_monoceroti","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2009\/11\/14\/beta_monoceroti\/","title":{"rendered":"Beta Monocerotis (Struve 919)"},"content":{"rendered":"<div class=\"imageblock\"><a href=\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2008\/img2008113003_BetaMONlg.jpg\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2008\/img2008113003_BetaMON.jpg\" alt=\"Sketch of Beta Monocerotis (Struve 919\/STF 919)\"><\/a><\/p>\n<p class=\"caption\">Sketch of Beta Monocerotis (Struve 919)<\/p>\n<p><i>Click image to view larger version.<\/i><\/p>\n<\/div>\n<p><b>Observation Notes:<\/b><\/p>\n<p>Beta Monocerotis is a great multiple star. At low power, it appears to be a double star, but bumping up the magnification shows the eastern component to be a close double itself. Despite all three components being B class stars, I could not shake the impression of the primary appearing pale yellow. So, in my ongoing (and futile) effort to establish that I&#8217;m not a madman, I present other observes, some of whom have noted the yellow color too:<\/p>\n<ul>\n<li>M. Bracewell: <a href=\"http:\/\/wgg.com\/scope\/dbl.html#031\" target=\"_blank\" rel=\"noopener\">All Yellow<\/a><\/li>\n<li>Nigel Puttick: <a href=\"http:\/\/weather.mfc-cs.com\/Space\/lists\/AIV1-7.htm\" target=\"_blank\" rel=\"noopener\">All Yellow-White<\/a><\/li>\n<li><a href=\"http:\/\/www.carbonar.es\/s33\/Monoceros-Lepus\/Struve-919.html\" target=\"_blank\" rel=\"noopener\">33 Doubles Observing Project<\/a><br \/>\nTIm Leese: White\/Pale-White\/Pale-White<br \/>\nWilliam Schart: All Yellow<br \/>\nPatrick Thompson: All White<br \/>\nEddy O&#8217;Connor: White\/Greenish-White\/Greenish-White<br \/>\nLuis Balanzino: All White-Bluish<\/li>\n<li><a href=\"http:\/\/www.cloudynights.com\/ubbarchive\/showflat.php\/Cat\/1,2,3,4,5,6,7,8,9,10\/Number\/1343809\/page\/25\/view\/collapsed\/sb\/6\/o\/all\/fpart\/1\" target=\"_blank\" rel=\"noopener\">Cloudy Nights<\/a><br \/>\nVedran Vrhovac: All Cream-Yellow<br \/>\nRich N.: All Bluish-White<br \/>\nRich (RLTYS): Bluish-White(hint yellow), Bluish, White<br \/>\nMark K.: All Ice-Blue<\/li>\n<\/ul>\n<table class=\"objectdata\">\n<tr>\n<td><b>Subject<\/b><\/td>\n<td class=\"subject\">Beta Monocerotis (STF 919)<\/td>\n<\/tr>\n<tr>\n<td><b>Classification<\/b><\/td>\n<td>Multiple Star<\/td>\n<\/tr>\n<tr>\n<td><b>Position (J2000)*<\/b><\/td>\n<td>Monoceros [RA: 06:28:49.5 \/ Dec: -07:02:03.5]<\/td>\n<\/tr>\n<tr>\n<td><b>Position Angle<\/b><\/td>\n<td>AB: 133&deg; [My Measurement 2008.9]<br \/>AB: 132&deg; [WDS 1831]*<br \/>AC: 126&deg; [My Measurement 2008.9]<br \/>AC: 125&deg; [WDS 1831]*<\/td>\n<\/tr>\n<tr>\n<td><b>Separation<\/b><\/td>\n<td>AB: 8.6&#8243; [My Measurement 2008.9]<br \/>AB: 7.2&#8243; [WDS 1831]*<br \/>AC: 12&#8243; [My Measurement 2008.9]<br \/>AC: 9.9&#8243; [WDS 1831]*<br \/>BC: 2.6&#8243; [My Measurement 2008.9]<br \/>BC: 2.5&#8243; [WDS 1831]*<\/td>\n<\/tr>\n<tr>\n<td><b>Magnitudes*<\/b><\/td>\n<td>A: 4.7; B: 5.2; C: 6.1<\/td>\n<\/tr>\n<tr>\n<td><b>Spectral Types*<\/b><\/td>\n<td>A: B2V; B: B3V; C: B2V<\/td>\n<\/tr>\n<tr>\n<td><b>Date\/Time<\/b><\/td>\n<td>DEC 1, 2008 &#8211; 12:45 AM (DEC 1, 2008 &#8211; 07:45 UT)<\/td>\n<\/tr>\n<tr>\n<td><b>Observing Loc.<\/b><\/td>\n<td>Flagstaff, AZ &#8211; Home<\/td>\n<\/tr>\n<tr>\n<td><b>Instrument<\/b><\/td>\n<td>Orion SkyQuest XT8 Dobsonian (203 mm dia.\/1200 mm F\/L)<\/td>\n<\/tr>\n<tr>\n<td><b>Eyepieces\/Mag.<\/b><\/td>\n<td>Pentax XW10 + 2X Barlow (240X)<br \/>Meade Astrometric EP + 2X Barlow (200X)<\/td>\n<\/tr>\n<tr>\n<td><b>Conditions<\/b><\/td>\n<td>Clear, cool, slight breeze<\/td>\n<\/tr>\n<tr>\n<td><b>Seeing<\/b><\/td>\n<td>5\/10 Pickering<\/td>\n<\/tr>\n<tr>\n<td><b>Transparency<\/b><\/td>\n<td>Mag 6.0 NELM<\/td>\n<\/tr>\n<tr>\n<td><b>*References<\/b><\/td>\n<td>The 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":"<p>Beta Monocerotis<\/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":[16,56,57,88,15],"tags":[],"class_list":["post-505","post","type-post","status-publish","format-standard","hentry","category-deep-sky","category-double-star","category-sg-double-star","category-sgc-monoceros","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":286,"url":"https:\/\/perezmedia.net\/beltofvenus\/2012\/06\/09\/beta_cygni_stru\/","url_meta":{"origin":505,"position":0},"title":"Albireo (Beta Cygni \/ Struve-A 43)","author":"jperez1690","date":"June 9, 2012","format":false,"excerpt":"Beta Cygni","rel":"","context":"In &quot;Double Star&quot;","block_context":{"text":"Double Star","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/double-star\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":84,"url":"https:\/\/perezmedia.net\/beltofvenus\/2009\/10\/07\/doublemultiple_4\/","url_meta":{"origin":505,"position":1},"title":"Rigel (Beta Orionis \/ Struve 668)","author":"jperez1690","date":"October 7, 2009","format":false,"excerpt":"Rigel","rel":"","context":"In &quot;Double Star&quot;","block_context":{"text":"Double Star","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/double-star\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":14,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/08\/01\/double_star_ske\/","url_meta":{"origin":505,"position":2},"title":"Double Star Sketches","author":"jperez1690","date":"August 1, 2004","format":false,"excerpt":"Double Star Sketches","rel":"","context":"In &quot;General&quot;","block_context":{"text":"General","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/general\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":285,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/09\/04\/beta_lyrae_stru\/","url_meta":{"origin":505,"position":3},"title":"Beta Lyrae (Struve 39 and Burnham 293)","author":"jperez1690","date":"September 4, 2006","format":false,"excerpt":"Beta Lyrae","rel":"","context":"In &quot;Double Star&quot;","block_context":{"text":"Double Star","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/double-star\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":173,"url":"https:\/\/perezmedia.net\/beltofvenus\/2008\/05\/12\/beta_capricorni\/","url_meta":{"origin":505,"position":4},"title":"Beta Capricorni (Struve 52)","author":"jperez1690","date":"May 12, 2008","format":false,"excerpt":"Beta Capricorni","rel":"","context":"In &quot;Double Star&quot;","block_context":{"text":"Double Star","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/double-star\/"},"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":505,"position":5},"title":"Xi Scorpii (Struve 1998) and Struve 1999","author":"jperez1690","date":"December 5, 2009","format":false,"excerpt":"Xi Scorpii","rel":"","context":"In &quot;Deep Sky&quot;","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\/505","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=505"}],"version-history":[{"count":0,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/505\/revisions"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=505"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=505"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=505"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}