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mira variable

Alert Notice 589: R Aqr coverage needed for HST and Chandra observations

August 4, 2017: Dr. Margarita Karovska (Harvard-Smithsonian Center for Astrophysics) has requested "visual, photometric, and spectroscopic observations of the symbiotic variable R Aqr in preparation for and in support of Chandra and HST observations currently scheduled for October 2017."

Alert Notice 535: R Aqr observing campaign

Ongoing visual, photometric, and spectroscopic observations of R Aqr about once every 10 days are requested, both to detect and observe the next eclipse and to continue the light curve of this star that has been in the AAVSO observing program for over a century.   Elizabeth O. Waagen, August 2017

Mira Variables with Period Changes

Mira variables are the longest-observed class of stars for which we have long-term quantitative data that allow us to study their behavior over centuries-long periods of time.  Fortunately for us, they're also easy to observe and monitor, having some of the largest amplitudes of all variables, and hundreds of them are bright enough that they're within reach of astronomers with modest telescopes.

AAVSO Bulletin 73 for 2010 - Stars in Need of Observations

                        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 

AAVSO Bulletin 73 for 2010 - How to Use the Bulletin

  How to Use Bulletin 73

IMPORTANT NOTICE:

Bulletin 73 was NOT prepared in the same way as in the past. Please be sure to READ THE INTRODUCTION before you use the Bulletin; contact AAVSO Headquarters if you have questions.

AAVSO Bulletin coordinates

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

AAVSO Bulletin 73 for 2010 Feb11

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    

AAVSO Bulletin 73 for 2010 Jan11

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    

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