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Early Access Versions of AstroGrav

Registered users of AstroGrav are entitled to download and use early access versions of AstroGrav when they are available. These give you the opportunity to try out and comment on new features before they are finalized and released to the general public, and your feedback can help identify bugs and influence the final form that new features take.

AstroGrav Early Access Software License Agreement

Early access versions of AstroGrav are only available to registered users of AstroGrav, and you must install them on a computer that already has a registered copy of AstroGrav 4.x.x (any version) installed on it.

You must click on the button below to accept the AstroGrav Early Access Software License Agreement before downloading any early access versions of AstroGrav.

Accept License Agreement  |   Decline License Agreement

AstroGrav Early Access Download

When you have accepted the license agreement, you can click on one of the buttons below to download the AstroGrav installer.

Alternatively, you can click on the button below to download just the AstroGrav executable for Windows, without the sample simulations and documentation.

The following early access versions of AstroGrav 4.1 have been released.

The documentation and tutorial have not yet been updated to cover the new features and changes. Please contact us if you require further information or advice.

AstroGrav 4.1 Early Access 01 was uploaded on 7th September 2019, and has the following improvements and bug fixes in addition to those in earlier versions.

  • New JPL Search and MPC Search options have been added to the Edit / Import Objects... dialog. These allow you to quickly import a single comet or asteroid into a solar system simulation without having to find and select it from a table.
  • A bug has been fixed that prevented faint background stars from being displayed after loading if the 'Evolve to present' message was showing.
  • A bug has been fixed that prevented faint background stars from being displayed if AstroGrav was installed in a non-default location on Windows.

AstroGrav 4.1 Early Access 02 was uploaded on 9th September 2019, and contains several minor improvements to the Edit / Import Objects... command that make the new JPL Search and MPC Search options easier to use.

AstroGrav 4.1 Early Access 03 was uploaded on 18th October 2019, and has the following improvements to evolving to events using the Evolve / Evolve To... command.

  • Occultation, Overlap (either a transit or an occultation), and Collision events have been added to the types of events that can be sought.
  • The choice of objects involved in events is now much more flexible.
  • Any object can be used as the viewpoint, instead of the Earth being the compulsory viewpoint.
  • Some type of events now allow a limiting value to be specified, which can be useful to eliminate events that are not of interest.
  • Evolving to events is now available in all simulations, instead of being restricted to just solar system simulations.
  • A bug has been fixed that could cause AstroGrav to get stuck in an infinite loop when evolving to a transit.

In addition, Inner-Earth asteroids have been renamed Atiras in the Edit / Import Objects... command, and there are many other improvements and bug fixes in addition to those in earlier versions.

AstroGrav 4.1 Early Access 04 was uploaded on 4th November 2019, and contains several improvements and bug fixes to the Evolve / Evolve To... command that make evolving to events easier to use.

There are also several other minor improvements and bug fixes.

AstroGrav 4.1 Early Access 05 was uploaded on 5th November 2019, and contains a fix for the bug that made particle chooser components difficult to use on Windows.