I was going to mention that, or ask about it. As far as I can tell, there's no reason that everyone shouldn't be using powered orbits, is there? All traveler spacecraft (prior to T5 at least) could minimally maintain 1g acceleration for 30 days which removes the need for orbits at all. I'd imagine space stations need not be in orbit either. In fact, around asteroids and planetoids, the space station operator would have to be careful as an object in a powered orbit like that is effectively a gravitational tractor, and will change the orbit of the planetoid around its primary star over a long enough period of time.

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On January 21, 2018 1:25 AM, Rupert Boleyn <xxxxxx@gmail.com> wrote:

There's one other type of 'orbit' I've had use for - a 'powered orbit'

where the ship is under power and the shape of the orbit bears no

relation to the 'orbital' velocity. This could be a ship hovering 1000km

above the world's surface (so 'geosynchronous' but obviously far too low

to really be such), or one 'orbiting' in 30 minutes while a few thousand

km up. IMTU these are known as 'powered orbits', even though they are

not technically orbits at all.