Dave's Astro Tools
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How Big is a Light Year?
Lets you examine the size of a light year and travel times to astronomical objects.

Last updated 27 November 2019


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hbialy.zip
File Size: 5215 kb
File Type: zip
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AstroSize
Helps you to determine the size of an object that is contained within an on-screen image that you have taken yourself or the on-screen display of your imaging camera's live feed.

Last updated 5 March 2019

astrosize.zip
File Size: 3870 kb
File Type: zip
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Telescope Circles
A collimation aid for mirror telescopes. It provides two adjustable concentric circles that you can lay over a defocussed image of a star to ensure that the silhouette of the secondary mirror is exactly centered within the bright image of the primary mirror

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telescope_circles.zip
File Size: 1476 kb
File Type: zip
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Dave's Crosshairs
A general purpose set of double crosshairs. The length, width, separation and colour of the hairs are adjustable. The cross can be rotated to suit any orientation.

davescrosshairs.zip
File Size: 727 kb
File Type: zip
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Bahtinov
Mask Guide
A simple resizeable and rotatable overlay for centring the middle spike between the two outer X spikes of a Bahtinov mask image

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bahtinovmaskguide.zip
File Size: 679 kb
File Type: zip
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Night
Vision Saver
A variable intensity rubilith simulation that can be used to cover all / part of your computer screen to preserve night vision after dark.





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nightvisionsaver.zip
File Size: 678 kb
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Electronic Orrery
An electronic version of the orreries that were popular long ago. Fun to use but does not compare in accuracy or graphic sophistication with modern planetarium programs. Very suitable for introducing youngsters to the mechanics of the Solar System.


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electronic_orrery.zip
File Size: 2221 kb
File Type: zip
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Please be aware that this application was created some years ago and it does not run properly on computers for which the regional setting requires a comma for the decimal point and periods for thousands separators when displaying numerical values. Thus regrettably users in continental Europe, etc. would need to change their regional setting to (say) English (USA) before opening the application.
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TalkingTimer
A speaking countdown clock particularly suited to monitoring the exposure time taken by astro imaging cameras.





talkingtimer.zip
File Size: 4995 kb
File Type: zip
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Reticles
A general purpose set of reticles that, among other things, can be used to plan the layout of an image that you will be making.            Last updated 24 November 2014.



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reticles.zip
File Size: 727 kb
File Type: zip
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ImagingMap
A free-standing image mapping application that can be used with any image acquisition software to ensure that the camera is accurately aimed during repeated exposures of the same target object .

Last updated 3rd March 2018


imagingmap.zip
File Size: 852 kb
File Type: zip
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Blackbody Temperature Calculator
A simple calculator that displays temperature for any given peak wavelength.


blackbodytemperaturecalculator.zip
File Size: 683 kb
File Type: zip
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