With two pieces of ash, I make a mortise and a tenon
I cut a circle segment..
.. which is routed with an angle of 43 degrees (my latitude)
.. the resulting piece is cut lengthwise at an angle (difficult to determine - I used trial and error)
then assembled with a biscuit jointer.
The mobile part is ready to glue up.
Starting to assemble the fixed part. I bought the DC motor, regulating circuit and reducing gear from conrad.fr
Detail of the drive cylinder, made of wood covered with heat-shrink tubing for traction
The south pivot uses a window hinge
The north-east bearing
The table is almost finished, with its electronic box and leveling screws.
This is a view of the night sky, with planets (in red) at their current place computed from Jean Meeus' "Astronomical Algorithms"
You can zoom and scroll the globe, and click on stars to show their name.
Ephemeris: Peter Hayes
The star database comes from the astronomy nexus
The constellation lines and boundaries come from the PP3 program
The next steps are to add deep-sky objects, and to show the sky in proper azimuthal projection, using the browser's location services to find the user's place on the earth.