variable

The following articles contain useful and interesting information on individual variable stars. Many of the most popular stars in the AAVSO observing program are featured.  From December 1998 until December 2002, the collection of articles comprised the "Variable Star of the Month" series. Since that time, they have all been published as part of the "Variable Star of the Season" (VSOTS) collection. Each article is available in either .html or .pdf format.

                        STARS IN NEED OF OBSERVATIONS
                                      in 
    AAVSO BULLETIN 73:  Predicted Maxima and Minima of Long Period Variables for 2010

The stars listed below need additional observations. Please be aware that many of these 
stars are difficult to observe, and should be observed only by experienced observers. 
Please note that the symbol % after a star name indicates the star has fair to excellent 
CCDV or multicolor photometry but still needs visual observations. Because all of the 

  How to Use Bulletin 73

Introduction to Bulletin 73

Note to Users of 2010 Bulletin

AAVSO Bulletin Stars with 2000.0 Coordinates

Note: Stars are in Bulletin order. Coordinates are ICRS from Simbad.

Designation Name       R.A. 2000.0     Dec. 2000.0
0003-39     V SCL      00 08 37.34     -39 13 05.1
0004+51     SS CAS     00 09 36.5303   +51 34 00.873
0009+28     UW AND     00 14 10.930    +29 01 20.39
0010+46     X AND      00 16 09.57     +47 00 44.8
0010-32     S SCL      00 15 22.2650   -32 02 42.987
0014+44     VX AND     00 19 54.0171   +44 42 33.898
0017+55     T CAS      00 23 14.2716   +55 47 33.206
0017+26     T AND      00 22 23.146    +26 59 45.77

IMPORTANT NOTICE: Bulletin 73 was NOT prepared in the same way as in the past. 
READ THE INTRODUCTION before you use the Bulletin; contact AAVSO Headquarters 
for more precise dates for research.

Predicted MAXIMA of long period variables for February 2011
*0014+44      VX And         7.9-9.6     Feb 13?   
 0049+58      W Cas         <8.8-11.8>   Feb  5    
 0231+33      R Tri         <6.2-11.7>   Feb 17    
*0419+16      VX Tau   %@    9.7-(15.0   Feb 22?   
 0422+09      R Tau    %&   <8.6-14.2>   Feb 18    

IMPORTANT NOTICE: Bulletin 73 was NOT prepared in the same way as in the past. 
READ THE INTRODUCTION before you use the Bulletin; contact AAVSO Headquarters 
for more precise dates for research.

Predicted MAXIMA of long period variables for January 2011
 0017+26      T And         <8.5-13.8>   Jan 14    
*0027+25A     TU And        <8.5-12.5>   Jan 19?   
 0054-75      U Tuc    %@   <8.6-14.1>   Jan 26    
 0110+41A     UZ And       <10.1-14.9>   Jan  8    
 0117+12      U Psc    %&  <11.0-14.4>   Jan  6    

IMPORTANT NOTICE: Bulletin 73 was NOT prepared in the same way as in the past. 
READ THE INTRODUCTION before you use the Bulletin; contact AAVSO Headquarters 
for more precise dates for research.

Predicted MAXIMA of long period variables for December 2010
 0010-32      S Scl    %#   <6.7-12.9>   Dec 24    
*0022+30      YZ And        10.1-15.9    Dec 17?   
 0044-35      X Scl    %@  <10.6-(14.2>  Dec 31    
 0046+33      RR And        <9.1-15.1>   Dec  1    
*0127+46      SX And         8.6-14.6    Dec 12?   

IMPORTANT NOTICE: Bulletin 73 was NOT prepared in the same way as in the past. 
READ THE INTRODUCTION before you use the Bulletin; contact AAVSO Headquarters 
for more precise dates for research.

Predicted MAXIMA of long period variables for November 2010
 0010+46      X And    %#   <9.0-14.8>   Nov 24    
 0024-38A     T Scl     #   <9.2-13.0>   Nov 30    
 0025-46      T Phe    %@   <9.4-14.2>   Nov  5    
 0041+32      RW And        <8.7-14.8>   Nov  5    
 0101-02      Z Cet     &   <8.9-13.5>   Nov 22