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.
|
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 |