What orbital configuration is required for a planet to be observed using the transit method?

Answer

An edge-on orbit.

For a planet to transit, its orbit must be perfectly aligned with our line of sight, a configuration astronomers define as an edge-on orbit.

What orbital configuration is required for a planet to be observed using the transit method?

#Videos

How Does the Transit Method Detect Exoplanets? - YouTube

astronomyexoplanetstransit methodPlanet Sizestellar observation