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Janet Mattei

AAVSO Maxima and Minima for Long Period Variables: Data Access

These data are formally published for the years 1900 to 2008.  For a description of this data set, please click here.

Note: A separate page exists for the data including unpublished times of maxima.  Go here for the current data set including the most recent data (through February of the current year).

Stars with maxima and minima data are as follows:

AAVSO Maxima and Minima of Long Period Variables, 1900-2008

Elizabeth O. Waagen, Janet A. Mattei, and Matthew R. Templeton

Click here for data access


Long-term observations of long period variable stars are essential to the determination of period, change in period, change in behavior resulting from mass loss and/or evolution, mode of pulsation (fundamental or overtone), internal structure, and phase at specific times for these stars.

The 93rd Annual Meeting of the AAVSO - Archive

The 93rd Annual Meeting of the AAVSO

A Day in Honor of Janet Akyüz Mattei (1943-2004)
Brandeis University
Waltham, Massachusetts
October 29-30, 2004


Schedule and video coming soon.

Janet A. Mattei's 30th Anniversary

The American Association of Variable Star Observers


wishes to honor

Janet Akyüz Mattei


on this, the thirtieth anniversary of her Directorship of the Association.

The AAVSO's Invariable Star

From Sky & Telescope, December 2003. Copyright 2003 by Sky Publishing Corp. Reproduced with permission of the publisher. Star Trails - By David H. Levy

An Observing Tale

by Janet A. Mattei, AAVSO Director 1973-2004, published in Eyepiece Views, September 2002.

How have you made your "friendship" with variable stars? Has it been through your observing? Or through your reading? Or through your training?

AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484