Making ASAS-SN light curves public is primarily funded by grant GBMF5490
Using in Publications

When using ASAS-SN light curves in publications cite: Shappee et al. (2014) and either: (i) The ASAS-SN Catalog of Variable Stars I: Jayasinghe et al. (2018a) or (ii) The ASAS-SN Catalog of Variable Stars II: Jayasinghe et al. (2018b) , (iii) The ASAS-SN Catalog of Variable Stars III: Jayasinghe et al. (2019b) , (iv) The ASAS-SN Catalog of Variable Stars V: Jayasinghe et al. (2020) , or (v) The ASAS-SN Catalog of Variable Stars IX: Jayasinghe et al. (2021).

Welcome to the ASAS-SN Variable Star Atlas


Variable stars are useful astrophysical tools that have been used to study various aspects of stellar evolution and Galactic structure. They also allow astronomers to probe distances to nearby star clusters and galaxies. Stars can exhibit variability due to a variety of reasons. Stellar variability can largely be categorized into variability caused by intrinsic and extrinsic factors. Intrinsic variables encompass stars that vary in brightness due to changes in the physical properties of the stars themselves. For example, pulsating stars like RR Lyrae and Cepheids are intrinsic variables. Conversely, extrinsic variables are stars that exhibit variability due to external properties, such as eclipsing binaries.

To help understand the different types of variable stars, we have constructed a variability tree diagram. This distinction between intrinsic and extrinsic variables is the first node on the variability tree. While seemingly broad, this categorization can be quite insightful to understand stellar variability. From this, the tree narrows down the variability type even further. Upon selecting an end node of our classification tree, you will be brought to a page dedicated to that specific variable type. Here, you will have access to a short description of the variability class, notable light curve features, and a selection of exemplary light curves.

Browse by Type


Visualization Catalog


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Color-Magnitude Plot

Interactive plot to compare color-magniture of different types of Variable Stars.

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Period-Luminosity Plot

Interactive plot to compare period-luminosity of different types of Variable Stars.

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Variable Stars Map

Interactive star map to view different types of Variable Stars and their positions.

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