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mira variable

Alert Notice 665: R Aqr observations needed urgently

Note: R Aqr is out of its seasonal gap and is increasingly observable. Continued coverage is requested as described below until further notice. - Elizabeth O. Waagen, May 3, 2019

April 19, 2019:  Dr. Lee Anne Willson (Iowa State University) is urgently requesting observations of the symbiotic Mira R Aqr, particularly from our Southern observers.

AAVSO Bulletin 81 for 2018 published

AAVSO Bulletin 81: Predicted Dates of Maxima and Minima of Long Period Variables for 2018 has been published. This annual publication covers the period January 2018 - February 2019 and gives predicted extrema dates for 381 Long Period Variables in the AAVSO's Legacy LPV program.


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

Note: This campaign has been extended through the 2018 observing season.

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, March 2019

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
    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


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


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