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AAVSO Bulletin 75 - Stars with Double Maxima

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In AAVSO Bulletin 75 there are two stars that exhibit double maxima:  R Cen and R Nor. These stars therefore have primary and secondary maxima and minima. They are not included in the main Bulletin table. Their predicted dates of maximum and minimum for January 2012 through February 2013 are presented here in list form (JD and Gregorian calendar dates) and in approximation of the main Bulletin table format.

The star V Boo had for several years exhibited essentially double maxima and was included on this page in 2011. V Boo is no longer exhibiting this behavior, but for continuity's sake is included on this page for 2012.

In the information below, 'I' indicates a primary extremum and 'II' a secondary. For example, MAX(I) in the list and MAX(9-I) both mean a primary maximum, in this case on the 9th of the month in which the date appears. Dates are for 2012 except where indicated 2013.

V BOO   P = 260
2456052 MAY 4 MAX
2456178 SEP 7 min  
2456312 JAN 19, 2013 MAX


R CEN   P = 509
2455935  JAN 8 min(II)
2456099  JUN 20 MAX(I)
2456239  NOV 7 min(I)
2456341  FEB 17, 2013 MAX(II)


R NOR   P =  507.5
2455992  MAR 5 min(II)
2456146  AUG 6 MAX(I)
2456210  OCT 9 min(I)
2456290  DEC 28 MAX(II)

	In the table below, the following fields are given:
Name: name of variable star
Links:
 L - to the AAVSO Light Curve Generator
 X - to the International Variable Star Index (VSX)
 T - to the AAVSO table of published maxima/minima of long period variables
R.A. and Declination: coordinates in J2000.0
Period: in days
Range: average visual magnitude range based on data in the AAVSO International Database
N: number of observations in the AAVSO International Database received during calendar year 2011
JAN-DEC-FEB: January-December 2012, January-February 2013

The number in a given month indicates the date of extremum; MAX indicates Maximum and 
min indicates minimum.  The colors indicate (as chosen by the user) the intervals when 
the star will be brighter than visual magnitude 11.0 or fainter than magnitude 13.5.

Bulletin 75 Maxima and Minima for V Boo, R Cen, and R Nor January 2012-February 2013
NAME  
L X T R.A.            
DECLINATION PERIOD RANGE N JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC JAN FEB
V BOO L X T 14 29 45.27
+38 51 40.6 260 <7.0-11.3> 715
rising
rising rising
rising MAX(4) 
fading
fading
fading min(7)
rising
rising rising MAX(19)
fading
R CEN L X T 14 16 34.32
-59 54 49.3 509 <5.8-11.1> 216
min(8-II)
rising rising
rising rising MAX(20-I) fading fading
fading
fading min(7-I) rising rising MAX(17-II)
R NOR L X T 15 35 57.35
-49 30 28.7 507.5 <7.2-13.2> 77
fading
fading min(5-II) rising rising rising rising
MAX(6-I) fading min(9-I) rising MAX(28-II) fading fading
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