aavso.org · 3,822
The American Association of Variable Star Observers (AAVSO) is a non-profit organization dedicated to the study of variable stars. Founded in 1911, the AAVSO coordinates a global network of amateur and professional astronomers who observe, analyze, and report on changes in the brightness of stars. Variable stars exhibit fluctuations in luminosity over time, providing valuable data for astronomers studying stellar evolution, binary systems, and other astrophysical phenomena. The AAVSO's database contains millions of observations collected over the past century, making it a valuable resource for researchers worldwide. In addition to its observational work, the AAVSO offers educational programs, tutorials, and resources for astronomers of all levels. Whether you're a seasoned observer or just starting out, the AAVSO welcomes stargazers of all backgrounds to join in the excitement of variable star research.
aavso.org · years statistic
1997
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| 3 | 1 |
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| 7 | 1 |
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| 10 | 1 |
| 11 | 0 |
| 12 | 1 |
1998
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| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
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| 12 | 2 |
1999
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| 2 | 2 |
| 3 | 0 |
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| 5 | 0 |
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2000
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| 5 | 3 |
| 6 | 4 |
| 7 | 0 |
| 8 | 1 |
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| 10 | 3 |
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| 12 | 1 |
2001
| 1 | 0 |
| 2 | 2 |
| 3 | 7 |
| 4 | 3 |
| 5 | 6 |
| 6 | 1 |
| 7 | 1 |
| 8 | 0 |
| 9 | 1 |
| 10 | 0 |
| 11 | 1 |
| 12 | 0 |
2002
| 1 | 2 |
| 2 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | 3 |
| 6 | 0 |
| 7 | 2 |
| 8 | 1 |
| 9 | 3 |
| 10 | 0 |
| 11 | 4 |
| 12 | 0 |
2003
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| 2 | 4 |
| 3 | 3 |
| 4 | 3 |
| 5 | 1 |
| 6 | 4 |
| 7 | 2 |
| 8 | 0 |
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| 12 | 4 |
2004
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| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 0 |
| 6 | 9 |
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| 9 | 7 |
| 10 | 2 |
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| 12 | 3 |
2005
| 1 | 3 |
| 2 | 5 |
| 3 | 1 |
| 4 | 2 |
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| 7 | 6 |
| 8 | 2 |
| 9 | 2 |
| 10 | 2 |
| 11 | 8 |
| 12 | 17 |
2006
| 1 | 248 |
| 2 | 9 |
| 3 | 1 |
| 4 | 10 |
| 5 | 2 |
| 6 | 6 |
| 7 | 7 |
| 8 | 6 |
| 9 | 3 |
| 10 | 3 |
| 11 | 0 |
| 12 | 6 |
2007
| 1 | 6 |
| 2 | 3 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 1 |
| 8 | 0 |
| 9 | 1 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
2008
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 2 |
| 6 | 1 |
| 7 | 23 |
| 8 | 21 |
| 9 | 18 |
| 10 | 8 |
| 11 | 3 |
| 12 | 4 |
2009
| 1 | 2 |
| 2 | 3 |
| 3 | 0 |
| 4 | 12 |
| 5 | 11 |
| 6 | 8 |
| 7 | 10 |
| 8 | 4 |
| 9 | 1 |
| 10 | 2 |
| 11 | 0 |
| 12 | 0 |
2010
| 1 | 4 |
| 2 | 9 |
| 3 | 12 |
| 4 | 1 |
| 5 | 0 |
| 6 | 3 |
| 7 | 0 |
| 8 | 1 |
| 9 | 2 |
| 10 | 3 |
| 11 | 3 |
| 12 | 6 |
2011
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 5 |
| 5 | 2 |
| 6 | 2 |
| 7 | 8 |
| 8 | 8 |
| 9 | 4 |
| 10 | 4 |
| 11 | 1 |
| 12 | 2 |
2012
| 1 | 8 |
| 2 | 3 |
| 3 | 1 |
| 4 | 4 |
| 5 | 4 |
| 6 | 3 |
| 7 | 1 |
| 8 | 2 |
| 9 | 5 |
| 10 | 0 |
| 11 | 0 |
| 12 | 4 |
2013
| 1 | 4 |
| 2 | 0 |
| 3 | 3 |
| 4 | 5 |
| 5 | 4 |
| 6 | 1 |
| 7 | 1 |
| 8 | 2 |
| 9 | 4 |
| 10 | 5 |
| 11 | 1 |
| 12 | 4 |
2014
| 1 | 3 |
| 2 | 3 |
| 3 | 4 |
| 4 | 4 |
| 5 | 4 |
| 6 | 5 |
| 7 | 4 |
| 8 | 6 |
| 9 | 4 |
| 10 | 7 |
| 11 | 3 |
| 12 | 5 |
2015
| 1 | 14 |
| 2 | 10 |
| 3 | 9 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 6 |
| 8 | 11 |
| 9 | 12 |
| 10 | 9 |
| 11 | 10 |
| 12 | 4 |
2016
| 1 | 14 |
| 2 | 9 |
| 3 | 11 |
| 4 | 9 |
| 5 | 11 |
| 6 | 22 |
| 7 | 7 |
| 8 | 8 |
| 9 | 13 |
| 10 | 13 |
| 11 | 4 |
| 12 | 11 |
2017
| 1 | 16 |
| 2 | 4 |
| 3 | 12 |
| 4 | 4 |
| 5 | 13 |
| 6 | 20 |
| 7 | 4 |
| 8 | 10 |
| 9 | 5 |
| 10 | 7 |
| 11 | 6 |
| 12 | 4 |
2018
| 1 | 6 |
| 2 | 7 |
| 3 | 3 |
| 4 | 6 |
| 5 | 5 |
| 6 | 7 |
| 7 | 6 |
| 8 | 11 |
| 9 | 7 |
| 10 | 5 |
| 11 | 17 |
| 12 | 12 |
2019
| 1 | 10 |
| 2 | 17 |
| 3 | 14 |
| 4 | 8 |
| 5 | 8 |
| 6 | 10 |
| 7 | 8 |
| 8 | 9 |
| 9 | 11 |
| 10 | 12 |
| 11 | 4 |
| 12 | 15 |
2020
| 1 | 5 |
| 2 | 31 |
| 3 | 18 |
| 4 | 19 |
| 5 | 31 |
| 6 | 29 |
| 7 | 18 |
| 8 | 30 |
| 9 | 17 |
| 10 | 21 |
| 11 | 19 |
| 12 | 16 |
2021
| 1 | 17 |
| 2 | 26 |
| 3 | 21 |
| 4 | 30 |
| 5 | 36 |
| 6 | 105 |
| 7 | 11 |
| 8 | 15 |
| 9 | 13 |
| 10 | 17 |
| 11 | 22 |
| 12 | 19 |
2022
| 1 | 33 |
| 2 | 17 |
| 3 | 22 |
| 4 | 25 |
| 5 | 76 |
| 6 | 74 |
| 7 | 37 |
| 8 | 70 |
| 9 | 72 |
| 10 | 79 |
| 11 | 71 |
| 12 | 77 |
2023
| 1 | 74 |
| 2 | 27 |
| 3 | 121 |
| 4 | 67 |
| 5 | 95 |
| 6 | 74 |
| 7 | 63 |
| 8 | 48 |
| 9 | 14 |
| 10 | 42 |
| 11 | 73 |
| 12 | 89 |
2024
| 1 | 146 |
| 2 | 121 |
| 3 | 78 |
| 4 | 58 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
