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AAVSO Bulletin 76 - Stars with Double Maxima

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In AAVSO Bulletin 76 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 2013 through February 2014 are presented here in list form (JD and Gregorian calendar dates) and in approximation of the main Bulletin table format.

V Boo did not demonstrate double maxima behavior in 2011 but went back to it in 2012. Thus, it is included on this page for 2013.

In the information below, 'I' indicates a primary extremum and 'II' a secondary. For example, MAX(I) in the list and MAX(31-I) both mean a primary maximum, in this case on the 31st of the month in which the date appears. Dates are for 2013 except where indicated 2014.

V BOO   P = 260
2456343 FEB 19 min(I)
2456408 APR 25 MAX(II) 
2456489 JUL 15 min(II)
2456536 AUG 31 MAX(I)
2456603 NOV 6 min(I)
2456668 JAN 10, 2014 MAX(II)
 

R CEN   P = 462 (revised from 2012)
2456325 FEB 1 MAX(II)
2456423 MAY 10 min(II)
2456530 AUG 25 MAX(I)
2456682 JAN 24, 2014 min(I)


R NOR   P =  507.5
2456500 JUL 26 min(II)
2456623 NOV 26 MAX(I)
2456712 FEB 23, 2014 min(I)

 

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 2012
JAN-DEC-FEB: January-December 2013, January-February 2014

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 76 Maxima and Minima for V Boo, R Cen, and R Nor January 2013-February 2014
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(19-I) rising
MAX(25-II) fading
fading
min(15-II)
MAX(31-I) fading
fading
min(6-I) rising MAX(10-II)
fading
R CEN L X T 14 16 34.32
-59 54 49.3 462 <5.8-11.1> 216
rising MAX(1-II) fading fading min(10-II) risiing rising MAX(25-I)
fading
fading fading fading min(24-II) rising
R NOR L X T 15 35 57.35
-49 30 28.7 507.5 <7.2-13.2> 77
fading
fading fading fading fading fading min(26-II)
rising rising rising MAX(26-I) fading fading min(23-I)
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