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Early Access Versions of AstroGrav

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 Software License Agreement

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

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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.

AstroGrav Early Access Versions

The following early access versions of AstroGrav 4.4.3 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 4.4.3 Early Access 01 was uploaded on 16th November 2021, and has the following improvements and bug fixes in addition to those in earlier versions.

  • The Edit / Import Objects... command has been improved so that the data source and the epoch can be appended to names independently of each other.
  • The algorithm for detecting Trojan asteroids has been improved in the Edit / Import Objects... command.
  • A bug has been fixed that caused orbital elements to fail to be calculated after using the Edit / Import Objects... command with the Fast Import option.
  • The Edit / Import Objects... tables now auto-resize their columns as specified in the Auto-Resize Columns setting of the table preferences.
  • The default with of the Epoch column of an ephemeris table has been increased to accommodate the longer date formats.
  • An ephemeris table now maintains the positions and widths of its columns when a simulation is saved and re-opened.
  • The accuracy of an ephemeris table's refraction calculations has been improved.
  • A bug has been fixed that left a single row ephemeris table unchanged after changing the viewing location.
  • A bug has been fixed that left a single row ephemeris table unchanged after changing one of the Planetary Aberration, Refraction, or Use JNow settings.
  • A bug has been fixed that caused the latest solar system sample simulations to open with views from London instead of from the home location.
  • A table now always displays its vertical scroll bar, row scroller, and help button, regardless of the table's contents.
  • The calculation of orbital elements has been greatly speeded up in simulations containing a large number of low-mass objects.
  • A bug has been fixed that caused date/time formatting to simply drop any excess digits, instead of rounding to the nearest millisecond.
  • A bug has been fixed that could cause orbits to be drawn in the wrong place when View / Show / PlanetaryAberration was switched on.