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AAVSO BULLETIN 74 -Stars with Double Maxima

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In Bulletin 74 there are three stars that exhibit double maxima: V Boo, 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 2011 through February 2012 are presented here in list form (JD and Gregorian calendar dates) and in approximation of the main Bulletin table format.

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 2011 except where indicated 2012.

V BOO   P = 260
2455621  FEB 28 min(II)
2455661  APR 9 MAX(I)   
2455704  MAY 22 min(I)  
2455800  AUG 26 MAX(II)
2455881  NOV 15 min(II)
2455921  DEC 25 MAX(I)
2455964  FEB 6, 2012 min(I)

R CEN   P = 509
2455594  FEB 1 MAX(I)
2455760  JUL 17 min(I)
2455848  OCT 13 MAX(II)
2455959  FEB 1, 2012 min(II)


R NOR   P =  507.5
------- no min(II) in 2011
2455610  FEB 17 MAX(I)
2455718  JUN 5 min(I)
2455803  AUG 29 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 2010
JAN-DEC-FEB: January-December 2011, January-February 2012

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 74 Maxima and Minima for V Boo, R Cen, and R Nor January 2011-February 2012
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
fading 
min(28-II) rising
MAX(9-I) min(22-I) rising
rising
MAX(26-II) fading
fading
min(15-II) MAX(25-I) fading
min(6-I)
R CEN L X T 14 16 34.32
-59 54 49.3 509 <5.8-11.1> 216
rising
MAX(1-I) fading
fading fading fading min(17-1) rising
rising
MAX(13-II) fading fading fading min(1-II)
R NOR L X T 15 35 57.35
-49 30 28.7 507.5 <7.2-13.2> 77
rising
MAX(17-I) fading fading fading min(5-I) rising
MAX(29-II) fading fading fading fading fading fading
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