Question about the relevant physical parameters to build a backyard observatory I live in a big city: São Paulo, Brazil. I would like to build a simple telescope dome to do some amateur sky obseravtions. But the whole project lies on the viability to see something interresting more than just some stars. Due to high luminosity of cities this is a good question to ask.
So, which physical parameters are relevant to decide if a backyard observatory is a good holiday DIY project?
Many astronomers are using electronic eyepieces to overcome light pollution. You may want to see what these devices can do in your area'

I use several of the Mallincam cameras in my observatory. 

https://www.mallincam.net/

https://groups.io/g/MallinCam/topics

Some photos of my observatory and assistants

https://www.flickr.com/photos/142615862@N04/sets/72157672437929982

More home observatory sites

http://obs.nineplanets.org/obs/obslist.html