At what distance does the Earth become indistinguishable from stars and planets to the naked eye, like the Pale Blue Dot or like Venus or Mars visible from Earth? Dot-like rather than spherical.

As the Tesla Roadster with Starman was launched towards Mars and the main asteroid belt, at what distance would one no longer recognize the Earth and Moon as spherical bodies from the Tesla Roadster?

At what distance does the Earth become indistinguishable from stars and other planets to the naked eye, like the Pale Blue Dot or like Venus or Mars visible from Earth? Dot-like rather than spherical.

As the Tesla Roadster with Starman was launched towards Mars and the main asteroid belt, at what distance would one no longer recognize the Earth and Moon as spherical bodies from the Tesla Roadster?

At what distance does the Earth become irrecognizeable from other stars and planets, like the Pale Blue Dot or like Venus or Mars visible from Earth? Dot-like rather than spherical. As the Tesla Roadster with Starman was launched towards Mars and the main asteroid belt, at what distance would one no longer recognize the Earth and Moon as spherical bodies from the Tesla Roadster?

At what distance does the Earth become indistinguishable from stars and planets to the naked eye, like the Pale Blue Dot or like Venus or Mars visible from Earth? Dot-like rather than spherical. 

As the Tesla Roadster with Starman was launched towards Mars and the main asteroid belt, at what distance would one no longer recognize the Earth and Moon as spherical bodies from the Tesla Roadster?