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Tue, 01 Nov 2016 - Eclipsing Binary predictions : 2016 Nov & Dec

Here are predictions for the most favourably timed eclipses from the UK during November and December:

Times are in UT (same as GMT).

Remember that these times are only approximate. Observed mid eclipse times can sometimes differ from predictions by half an hour or more.

RZ Cassiopeiae

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 eclipses

Nov:   3d   20:40 ,  9d  20:05 ,  15d  19:35 ,  17d  00:10 ,  21d  19:00 ,  22d  23:40 ,  27d  18:25 ,  28d  23:05.

Dec:   3d  17:50 ,   4d  22:30 ,   9d  17:15 ,   10d  21:55 ,  16d  21:20 ,   22d  20:50 ,  28d  20:15 ,  30d  00:55.

U Cephei

Eclipses last for approx 9 hours. The times shown below are for the eclipse mid-point. Eclipses are total, so there is a period of constant brightness around the middle of the eclipse.

Unfortunately, as can be seen below, primary eclipses during November and December will not be occurring at a convenient time of night.

Nov:   5d  03:10 ,   10d  02:50 ,  15d  02:30 ,  20d  02:10 ,  25d  01:50 ,  30d  01:30.

Dec:   5d  01:10 ,  10d  00:50 ,  15d  00:30 ,  20d  00:10 ,  24d  23:50 ,  29d  23:30.

U Coronae Borealis

Eclipses last for approx 12 hours. The times shown below are for the eclipse mid-point.

With Corona Borealis sinking towards the evening twilight and only rcently emerged from the morning twilight, opportunities for seeing U CrB in eclipse will be rather limitd.

Nov    29d  18:20

Dec     3d   05:10 ,  10d   02:55.

beta Lyrae

Both the deeper primary eclipse and less deep secondary eclipse can be followed visually. There is no period of constant brightness between eclipses.

Primary:        Nov  6-7  ,  19-20  ,   Dec  2-3  ,  15-16  ,  28-29.

Secondary:   Nov 12-13  ,  25-26  ,  Dec  8-9  ,  21-22.

beta Persei (Algol)

Eclipses last for approx 10 hours. The times shown below are for the eclipse mid-point. Eclipses are total, so there is a period of constant brightness around the middle of the eclipse.

Nov  9d  00:45 , 11d  21:30 , 14d 18:20

Dec  1d  23:15 , 4d  20:00 , 22d 00:55 , 24d 21:45 , 27d 18:30

 

Added by: Tracie Heywood