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AAVSO Bulletin 77 - Stars with Double Maxima

In AAVSO Bulletin 77 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 2014 through February 2015 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 2014.

In the information below, 'I' indicates a primary extremum and 'II' a secondary. For example, MAX(I) in the list and MAX(25-I) in the table both mean a primary maximum, in this case on the 25th of the month in which the date appears. Dates are for 2014 except where indicated 2015.

V BOO   P = 260
2456748 MAR 31 min(II)
2456803 MAY 25 MAX(I) 
2456876 AUG 6 min(I)
2456949 OCT 18 MAX(II)
2457008 DEC 16 min(II)
2457063 FEB 9, 2015 MAX(I)
 

R CEN   P = 510 (revised from 2013)
2456730 MAR 13 min(I)
2456835 JUN 26 MAX(II)
2456965 NOV 3  min(II)


R NOR   P =  507.5
2456712 FEB 23 min(I)
2456792 MAY 14 MAX(II)
2457000 DEC 8 min(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 2013
JAN-DEC-FEB: January-December 2014, January-February 2015

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 77 Maxima and Minima for V Boo, R Cen, and R Nor January 2014-February 2015
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> 543
fading
fading min(31-II)
rising MAX(25-I)
fading
fading
min(6-i) rising
MAX(18-II)
fading min(16-II) rising
MAX(9-I)
R CEN L X T 14 16 34.32
-59 54 49.3 510 <5.8-11.1> 250
fading fading min(13-I) rising rising MAX(26-II) fading fading
fading
fading min(3-II) rising rising rising
R NOR L X T 15 35 57.35
-49 30 28.7 507.5 <7.2-13.2> 60
fading
min(23-I) rising rising MAX(14-II) fading fading
fading fading fading fading min(8-II) rising rising
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