• Turn your telescope into an efficient observing tool.
  • Thousands of celestial goodies will be at your fingertips.
  • Use with your PC or 'Stand-Alone'.
  • Identify those 'faint fuzzies' as you pan your scope.
  • Get the most out of your limited observing time.
  • Great in light polluted skies

The Sky Commander XP4 Digital Setting Circle Computer is packed with the
features you need at an affordable price. To learn more click here.

Try out the new Catalog Database Explorer -- Click Here.

Try out the AZ-EL Calculator -- Click Here.

** NEW - Run Boot-Flasher on your Mac!  

Notice to all customers and vendors:

6/24/2018 - New - Boot-Flasher v3.0 released. One button click to get latest updates. Go to 'Free Downloads' page.

8/6/2018 Firmware Update for SkyTracker is available. If you are controlling your Starmaster telescope with planetarium software running on a PC, you will want this. See TRK4V1 on Price Page.

8/8/2021 SkyTracker Control Pad V2.0 is now available. See TrackerPad2v0 on Downloads Page.

9/13/2021 Alignment Star AZ-EL Calculator V1.0 is now available. Use the calculator to identify suitable alignment stars for your observing session. See Align Star AZ-EL Calculator on Downloads Page.

9/25/2021 An update to Sky Commander firmware, V5.03 SP04 is available. Corrects errors in planet positions caused by precession. Start the Boot-Falsher utility and click 'Check for Updates'. Use 'Default Prog Files' to get this latest update.


Sky Commander XP4 Ready for Action!
Used with Discmounts DM6
Side View with Power Connector
Rear Panel with Encoder and Serial Port Connectors

Contact Sky Engineering

Last Updated Sept 25, 2021