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Website first online in 2000
This version went online in 2017
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Astronomical software

LST 2.0 screenshot

This page provides a number of astronomy software applications which I wrote.

They are of three types:

- Windows .NET programs
- Windows console programs
- Excel spreadsheets

The .NET programs were written in Visual Basic and compiled in Microsoft Visual Studio. The Windows console programs were written in C++ and compiled with Dev-C++. At this moment, I am redeveloping the Windows console programs into Windows .NET programs.

Note: download and use of these programs is at your own risk. Although I always test them before deployment, I cannot guarantee they always work correctly.

Note 2: Some antivirus programs complain with warnings about some of the programs below. Ignore those: the programs are 100% harmless, but unfortunately antivirus programs sometimes give false positives.

Show software list...

DOWNLOADS:

LST 2.0 - This program calculates the mean and apparent Local Stellar Time. Results can be saved to a .txt file.

Download
Current version: LST 2.0
type: Windows .NET executable
original version 1: 2017 (Windows console version)
date current version 2.0: 29 October 2017 (.NET version)

SOLLONG 3.1 - This program is of interest to meteor observers. SOLLONG 3.1 is a program that calculates the J2000 Solar Longitude for a given date and time. It also calculates the Julian Day and estimates Delta T. It employs the full VSOP87 theory and includes a correction from the mean dynamical equinox to FK5. Results can be saved to a .txt file

Download
Current version: SOLLONG 3.1
type: Windows .NET executable
original version 1: 2016 (Windows console version)
date current version 3.1: 29 October 2017 (.NET version)

IOD Entry 1.1 - This program is of interest to satellite observers. IOD Entry 1.1 is a program that creates satellite observation data lines in IOD format. IOD is the format used by international amateur satellite observers to communicate positional measurements on satellites. The resulting IOD formatted data lines can be saved to a .txt file and saved to an incremental archive file.

Download
Current version: IOD Entry 1.1
type: Windows .NET executable
original version 1: 1 November 2017
date current version 1.1: 5 November 2017

TLE from Proxy 1.0 - This program is of interest to satellite observers. TLE from Proxy is a program that estimates a TLE for a new launch, based on a proxy TLE from a previous similar launch. Inputs are a TLE from a previous similar launch, the date and time of that launch, and the date and time of the new launch. The resulting TLE can be saved to a .txt file.

Download
Current version: TLE from Proxy 1.0
type: Windows .NET executable
original version 1: 11 November 2017
date current version 1.0: 11 November 2017

TLExtract 3.7 - This program is of interest to satellite observers. TLExtract is a program to extract TLE's from a larger TLE file, based on a custom-set selection criterion (for example, you can set it to select all TLE with perigee above a certain height; or all TLE with "USA" in the object name; etcetera). Version 3.0 has drastically improved performance when operating on large files, and solved a problem with hidden line carriers. Version 3.7 added several new selection options (e.g. RAAN and orbit type) and option to copy output into the input window for further selection.

Download
Current version: TLExtract 3.7
type: Windows .NET executable
original version 1.0: 15 February 2018
date current version 3.7: 11 April 2018

Plane X 1.0 - This program is of interest to satellite observers. Plane X is a program to calculate the two moments in the day that the orbital plane of a satellite crosses exactly over a given location on Earth.

Download
Current version: Plane X 1.0
type: Windows .NET executable
original version 1.0: 6 April 2018
date current version 1.0: 6 April 2018

Hohmann transfer 1.1 - This program is of interest to satellite observers. Hohmann transfer is a program to calculate the delta V needed, and the amount of fuel needed, for a Hohmann transfer to a higher orbit.

Download
Current version: Hohmann transfer 1.1
type: Windows .NET executable
original version 1.0: 10 April 2018
date current version 1.1: 12 April 2018

D-orbit 1.0 - This program is of interest to satellite observers. D-orbit is a program to calculate the delta V and the amount of fuel needed to deorbit a spacecraft.

Download
Current version: D-orbit 1.0
type: Windows .NET executable
original version 1.0: 12 April 2018
date current version 1.0: 12 April 2018

HtoSize - H to Size gives an estimate of the size of an asteroid based on its H parameter.

Download
Current version: HtoSize 2.0
type: Windows .NET executable
original version 1: 2005 (Windows console version)
date current version 2.0: 2018

METORB 10 - METORB is an Excel spreadsheet to calculate meteor orbits from supplied radiant and speed information. In order to work with it, you will also need Planeph or similar software to calculate heliocentric X Y Z positions and speeds of the Earth.

Download
Current version: METORB 10
type: Excel spreadsheet
original version 1: 2004
date current version 10: October 2017

Zenitat 3 - Zenitat 3 is an Excel spreadsheet that calculates the zenit attraction of a meteor from a given geocentric velocity and true radiant altitude. Useful for calculating the apparent radiant of slow meteor streams with the radiant low in the sky.

Download
Current version: 3
type: Excel spreadsheet
original version 1: 2004
date current version: 2004

D' Crit - D' Crit is an Excel spreadsheet that compares two sets of heliocentric orbital elements and calculates Drummond's D' criterion, a measure for the similarity of the orbits.

Download
Current version: 1.0
type: Excel spreadsheet
original version 1: 2001
date current version: 2001

SOFTWARE BY OTHERS:

The following meteor and satellite related software is hosted here with permission of the developer:

AstroRecord 3.2 - AstroRecord by Marc de Lignie is astrometric software to measure wide-field astronomical imagery. It was developed for astrometry on widefield (D)SLR meteor imagery (typically with 50mm focal length lenses, i.e. field of views up to 40 degrees) within the Dutch Meteor Society in the 1990'ies. The software corrects for image distortions introduced by the lens system, by means of the "Turner" method.
The software loads black-and-white 8-bit .bmp imagery. With a modern DSLR and a (sufficient quality) 35mm to 50mm focal length lens, the astrometric accuracy obtained is typically 5" to 7". The astrometric limit of the software (inherent to the used somewhat dated star catalogue) is around 2".
The version hosted on the IMO website will no longer install under Windows versions beyond Xp. That is not a problem with AstroRecord (the 32 bits version actually works fine under Windows 10) but with the installer. Hosted here is a .zip file with all necessary files, that circumvents the installer. Simply unzip the .zip file into a directory C:/ASTROREC and it should work.
The Help-file of the program provides guidance on to how to use AstroRecord. I also included a pdf file that details the use, step-by-step, geared to measuring imagery containing a satellite trail.

Download
Current version: 3.2
type: Windows executable and related files
(Download hosted with permission by the developer, Marc de Lignie)

(c) 2017 by Marco Langbroek