I have uploaded my first beta into Warehouse. You can download it from there.
https://openrepos.net/content/matsav/stellarium-sfm

The known bugs (too big buttons and skycultures) are still present. In addition I noticed that I can not launch the application from the icon for some reason. Workaround is to launch it from terminal using command "stellarium".

Good luck... I'll be curious to hear if (and how well?) it works with different Sailfish devices, including the older Jolla phones?

EDIT: Moving forward I'll put my effort on getting the Stellarium-sf version working due to it having the proper GUI for Sailfish devices.

EDIT2: I have stored my source code to Github:
https://github.com/Matsavol/stellarium-SFM-master