Aladin Lite

A lightweight sky atlas running in the browser

Aladin lite is a lightweight version of the Aladin Sky Atlas, running in the browser and geared towards simple visualization of a sky region.

It allows one to visualize image surveys (JPEG multi-resolution HEALPix all-sky surveys) and superimpose tabular (VOTable) and footprints (STC-S) data.

Aladin lite is powered by the HTML5 canvas technology, currently supported by any modern browser

Aladin lite is easily embeddable on any web page and can also be controlled through a Javacript API.

It is dedicated to replace the Aladin Java applet technology in the medium term.

The panel on the right hand is not a regular image. It is actually Aladin Lite running as an embedded widget. You might try to zoom in and out using your mouse wheel, or pan the view to move around.

Aladin Lite comes with a full-featured API allowing one to customize its interface, control the view, change the image survey to display, create catalogues and overlay layers, develop powerful interactions between a web page and Aladin Lite.

The Aladin Lite API is described on a dedicated page.

Developers might also be interested in this tutorial, which shows step by step how to create an interactive sky map with Aladin Lite.

To give you an overview of how Aladin Lite can be used, have a look at the list of examples.

Aladin Lite has been integrated in the main CDS services:

  • On the SIMBAD page for an individual object, it provides an interactive preview image (see example for Messier 1).
  • The VizieR results page features a start Aladin Lite button to visualize the positions of listed sources (see example)

Outside CDS, Aladin Lite is used in several projects:

If your project is using Aladin Lite, we would be happy to have it listed here. Drop us a line!

Aladin Lite source code is available under GPL3 licence (Download Aladin Lite source code).

ipyaladin is a Jupyter notebook widget, developed at CDS, and allowing for easy embedding and control of Aladin Lite from an IPython notebook.


Ladislav Heller (ladislav.heller at has integrated Aladin Lite in an Android application using the Xamarin framework.
His development is available in his github repository:


If you have integrated Aladin Lite in an iPhone application, please let us know.

This page features some experimental, original usages of Aladin Lite.

  • Region editor

    The region editor is an Aladin Lite extension allowing users to plot polygons over the current sky view, and retrieve the coordinations of the vertices.
    It has been designed to be used as an interface for searches by region or for cutout services.
    This development has been funded by the SSC XXM-Newton.

    Documentation, installation instructions can be found on this page.

  • Tour navigator library

    The tour navigator is an Aladin Lite extension that allows to implement easily virtual tours of objects of interest. It has been designed to be used as interface for navigating through the sky from object to object. Allowing users to learn about each object they visit in the tour. The tour navigator plugin has been developed and designed at CEFCA (Centro de Estudios de Física del Cosmos de Aragón) by Tamara Civera. Documentation, source code and installation instructions can be found on this page.

January 2017

new method allowing direct query to SkyBot

September 2016

support of HiPS catalog (new format)

June 2016

fix astrometry offset by subdividing HEALPix cells too distorted

new method A.MOCFromJSON to create a MOC from the JSON serialization

March 2016

added raField and decField options when creating catalogue

December 2015

added cubehelix color map

added option in A.catalogFromURL to bypass proxy

access to Simbad and VizieR data (catalogFromVizieR and catalogFromSimbad) are now done directly, without the proxy

Novembre 2015

new methods getShareURL and getEmbedCode

October 2015

new methods for easy retrieval of Simbad, NED and VizieR data

new options for Catalog.onClick: 'showTable' or 'showPopup'

December 2014

added displayLabel option for a catalog overlay

added lineWidth option for A.graphicOverlay objects

October 2014

New shapes available for catalogue sources

Various bug fixes

April 2014

New API methods: getSize, getFov, world2pix, pix2world, getFovCorners

November 2013

New features: progressive catalogues, color maps, fullScreen option at startup, PNG export

New API methods: setFOVRange, listeners on objectClicked, objectHovered

Bug fix: support for Firefox < 4

July 2013

Added zoom control to the UI

Added method to trigger object selection

May 2013

First public beta release

Aladin Lite is developed and maintained by Thomas Boch.

Send your feedback, comments, feature requests and bug reports to this email address.

→ Thanks for acknowledging Aladin Sky Atlas

© Université de Strasbourg/CNRS

    • Contact