{"id":2408,"date":"2017-10-30T14:19:12","date_gmt":"2017-10-30T14:19:12","guid":{"rendered":"http:\/\/www.popastro.com\/main_spa1\/variablestar\/?p=2408"},"modified":"2017-11-23T15:41:31","modified_gmt":"2017-11-23T15:41:31","slug":"eclipsing-binary-predictions-2017-nov-dec","status":"publish","type":"post","link":"https:\/\/www.popastro.com\/variablestar\/2017\/10\/30\/eclipsing-binary-predictions-2017-nov-dec\/","title":{"rendered":"Eclipsing Binary predictions : 2017 Nov-Dec"},"content":{"rendered":"

Here are predictions for eclipses that are reasonably favourable from the UK during November and December:<\/p>\n

Times are in UT (same as GMT)<\/p>\n

RZ Cassiopeiae<\/strong><\/u><\/p>\n

Eclipses last 4.8h, with most of the brightness changes taking place during the middle 3 hours. The times shown below are for the mid-point of the primary eclipses. Eclipses are not quite total, so there is no spell of constant brightness at mid eclipse.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
Nov\u00a0 1<\/td>\n0.6h<\/td>\n<\/tr>\n
Nov\u00a0 5<\/td>\n19.3h<\/td>\n<\/tr>\n
Nov\u00a0 7<\/td>\n0.0h<\/td>\n<\/tr>\n
Nov 11<\/td>\n18.7h<\/td>\n<\/tr>\n
Nov 12<\/td>\n23.4h<\/td>\n<\/tr>\n
Nov 17<\/td>\n18.2h<\/td>\n<\/tr>\n
Nov 18<\/td>\n22.9h<\/td>\n<\/tr>\n
Nov 23<\/td>\n17.6h<\/td>\n<\/tr>\n
Nov 24<\/td>\n22.3h<\/td>\n<\/tr>\n
Nov 30<\/td>\n21.7h<\/td>\n<\/tr>\n
Dec\u00a0 2<\/td>\n2.4h<\/td>\n<\/tr>\n
Dec\u00a0 6<\/td>\n21.1h<\/td>\n<\/tr>\n
Dec\u00a0 8<\/td>\n1.8h<\/td>\n<\/tr>\n
Dec 12<\/td>\n20.6h<\/td>\n<\/tr>\n
Dec 14<\/td>\n1.2h<\/td>\n<\/tr>\n
Dec 18<\/td>\n20.0h<\/td>\n<\/tr>\n
Dec 20<\/td>\n0.7h<\/td>\n<\/tr>\n
Dec 24<\/td>\n19.4h<\/td>\n<\/tr>\n
Dec 26<\/td>\n0.1h<\/td>\n<\/tr>\n
Dec 30<\/td>\n18.9h<\/td>\n<\/tr>\n
Dec 31<\/td>\n23.6h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

U Cephei<\/strong><\/u><\/p>\n

Eclipses of U Cephei, though still occurring well into the night, gradually become better placed for observers in the UK.\u00a0 By mid-December, mid eclipse is occurring near midnight and so the fade into eclipse will be observable from mid evening onwards.<\/p>\n

Eclipses last for approx 9 hours. The times shown below are for the primary eclipse mid-point. Eclipses are total, so there is a period of constant brightness around the middle of the eclipse.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
Nov\u00a0 4<\/td>\n3.0h<\/td>\n<\/tr>\n
Nov\u00a0 9<\/td>\n2.7h<\/td>\n<\/tr>\n
Nov 14<\/td>\n2.3h<\/td>\n<\/tr>\n
Nov 19<\/td>\n2.0h<\/td>\n<\/tr>\n
Nov 24<\/td>\n1.7h<\/td>\n<\/tr>\n
Nov 29<\/td>\n1.3h<\/td>\n<\/tr>\n
Dec\u00a0 4<\/td>\n1.0h<\/td>\n<\/tr>\n
Dec\u00a0 9<\/td>\n0.7h<\/td>\n<\/tr>\n
Dec 14<\/td>\n0.3h<\/td>\n<\/tr>\n
Dec 19<\/td>\n0.0h<\/td>\n<\/tr>\n
Dec 23<\/td>\n23.7h<\/td>\n<\/tr>\n
Dec 28<\/td>\n23.3h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

U Coronae Borealis<\/strong><\/u><\/p>\n

Corona Borealis is now only briefly visible at the start of the evening.\u00a0 It is, however, becoming increasingly visible in the pre-dawn sky.\u00a0 Both intervals of observability are, of course, far too short for the whole eclipse to be observable in one session, but parts of the fade\/brightening will still be observable..<\/p>\n

Eclipses last for approx 12 hours. The times shown below are for the primary eclipse mid-point.\u00a0 Eclipses are not total, so there is no spell of constant brightness around the middle of the eclipse.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
Nov 16<\/td>\n21.4h<\/td>\n<\/tr>\n
Nov 23<\/td>\n19.1h<\/td>\n<\/tr>\n
Nov 30<\/td>\n16.8h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
Nov 27<\/td>\n5.9h<\/td>\n<\/tr>\n
Dec\u00a0 4<\/td>\n3.6h<\/td>\n<\/tr>\n
Dec 11<\/td>\n1.4h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
Dec 28<\/td>\n7.6h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Beta Lyrae<\/strong><\/u><\/p>\n

Beta Lyrae is best placed for observation in the evening sky for most of this period, but by the end of the year is better placed in the pre-dawn sky.<\/p>\n

Both the deeper primary eclipse and the less deep secondary eclipse can be followed visually.\u00a0 There is no period of constant brightness between eclipses.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
Nov\u00a0 3-4<\/td>\nprimary<\/td>\n<\/tr>\n
Nov 10-11<\/td>\nsecondary<\/td>\n<\/tr>\n
Nov 16-17<\/td>\nprimary<\/td>\n<\/tr>\n
Nov 23-24<\/td>\nsecondary<\/td>\n<\/tr>\n
Nov 29-30<\/td>\nprimary<\/td>\n<\/tr>\n
Dec 6-7<\/td>\nsecondary<\/td>\n<\/tr>\n
Dec 12-13<\/td>\nprimary<\/td>\n<\/tr>\n
Dec 18-19<\/td>\nsecondary<\/td>\n<\/tr>\n
Dec 25-26<\/td>\nprimary<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Beta Persei (Algol)<\/strong><\/u><\/p>\n

Algol is well placed for observation for most of the night.<\/p>\n

Eclipses last for approx 10 hours. The times shown below are for the primary eclipse mid-point. Eclipses are only partial, so there is no period of constant brightness around the middle of the eclipse.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Date<\/td>\nMid-Eclipse (UT)<\/td>\n<\/tr>\n
Nov\u00a0 8<\/td>\n4.3h<\/td>\n<\/tr>\n
Nov 11<\/td>\n1.1h<\/td>\n<\/tr>\n
Nov 13<\/td>\n21.9h<\/td>\n<\/tr>\n
Nov 16<\/td>\n18.8h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
Dec\u00a0 1<\/td>\n2.8h<\/td>\n<\/tr>\n
Dec\u00a0 3<\/td>\n23.7h<\/td>\n<\/tr>\n
Dec\u00a0 6<\/td>\n20.5h<\/td>\n<\/tr>\n
Dec\u00a0 9<\/td>\n17.3h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
Dec 24<\/td>\n1.4h<\/td>\n<\/tr>\n
Dec 26<\/td>\n22.2h<\/td>\n<\/tr>\n
Dec 29<\/td>\n19.0h<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Here are predictions for eclipses that are reasonably favourable from the UK during November and December:<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-2408","post","type-post","status-publish","format-standard","hentry","category-variable-stars"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t