Astronomy. Software. Systems.

24 – 28 October 2021
Cape Town, South Africa and Online


The 31st annual conference on Astronomical Data Analysis Software and Systems. The conference will be held physically in Cape Town at The Westin Hotel and Online, on 24-28 October 2021, and hosted by IDIA, RATT, and SARAO.

This annual conference, held in a different location each year, is a forum for astronomers, computer scientists, software engineers, faculty members and students working in areas related to algorithms, software and systems for the acquisition, reduction, analysis, and dissemination of astronomical data.

The ADASS XXXI program will include invited talks, contributed papers, posters, tutorials, focus demos, and special interest (“Birds of a Feather” or BoF) meetings. These activities aim to stimulate further development of software and systems to meet the data science challenges of astronomy.

This website will contain all the latest available information so please check back here often! For support, you can email us at

Key themes for ADASS XXXI are:

  • Solutions for workflow management and reproducibility
  • Understanding and improving machine learning
  • Modernizing and maintaining telescopes
  • Building accessible and friendly user interfaces
  • FAIR standards for astronomical data
  • Teaching resources for astroinformatics and virtual observatory
  • Image processing for the public and scientists
  • Big data: How to deal with the 5 Vs (volume, velocity, variety, veracity, value)
  • Citizen science in astronomy


  • Registration: 1 Oct (in person), 15 Oct (virtual)
  • Poster abstract submission: 1 Oct
  • Digital materials (videos and/or posters) upload: 17 Oct. See Instructions for authors and Upload instructions.
  • Payment deadline – Early Registration: 1 Oct. NB: If we’re late sending your invoice, don’t worry, we’ll extend your deadline.
  • Payment deadline – Late Registration: 15 Oct
  • Draft proceedings upload: 17 Oct. See Proceedings.

At this time, the Local Organizing Committee is working on hosting a hybrid meeting, with some in-person attendance and likely a large number of virtual attendees. Please note that if the COVID-19 situation changes such that in-person attendance is no longer possible, the meeting will switch to a fully virtual format.

In the meantime, we are happy to announce the list of invited speakers for this year’s key themes.

  • Rachel Street (Solutions for workflow management and reproducibility)
  • Michelle Lochner (Understanding and improving machine learning)
  • Eric Murphy (Modernizing and maintaining telescopes)
  • Kumiko Usuda-Sato (Building accessible and friendly user interfaces)
  • Simon O’Toole (FAIR standards for astronomical data)
  • Chenzhou Cui (Teaching resources for astroinformatics and virtual observatories)
  • Urvashi Rao (Image processing for the public and scientists)
  • Emily Lakdawalla (Image processing for the public and scientists)
  • Andy Connolly (Big data: How to deal with the 5 Vs (volume, velocity, variety, veracity and value)
  • Meg Schwamb (Citizen science in astronomy)

Further details regarding the format will follow in the coming months. Among many things, we will be looking at solutions to maximize attendance for a hybrid meeting. This format brings some new scheduling challenges given the various time zones of our international community.

The International Virtual Observatory Alliance (IVOA) meeting normally follows the ADASS meeting. This year the IVOA is planning for a fully virtual meeting. Please visit for details regarding that meeting.