What would be the ultimate orbital place to "hide" something in the Solar System?

[KerikBalm]

Remember that spectrometers can be used to detect certain elements that people might be looking for, like titanium used in the walls of an underground base. That just destroys all aspects of camouflage's functionality if you're got a spec satellite scanning in an area near your hidden base.

Spectrophotometers rely on reflected/transmitted light, if its underground, a spectrophotometer won't see it.

[TerLoki]

Well if survivability isn't concern you can always just hide in the sun. Nobody would ever be stupid enough to come after you.

[Stargate525]

If dV isn't an issue, I'd stick it into a sundiving polar orbit around the sun. There's not a ton of stellar astronomy that looks 'up' or 'down' to see it transit, you'll only get a solar pass very rarely (never, if you align the orbits properly) and it's not in a busy section of the system to attract attention.

[Seret]

Well if survivability isn't concern you can always just hide in the sun. Nobody would ever be stupid enough to come after you.

One of the Culture ships did exactly this in one of Iain M Banks' novels. They're immensely powerful though, shedding that kind of energy isn't a big deal for them.

EDIT: Looks like it was in Consider Phlebas. The GCU "Nervous Energy" bounced an Idiran warship by hiding in the photosphere of a nearby star. Ouch.

Edited April 25, 2014 by Seret

[FREEFALL1984]

How about a low solar orbit, that way you're radio signals will be camouflaged, you would also be visually camouflaged since the station would be too small to effectively detect optically unless you knew exactly where it was although you would have the obvious issue of super high radiation levels, but I guess if you could get a full extraplanetary community into a low solar orbit, then designing and building a radiation shield to protect you would be a walk in the park, would probably end up looking like the ship from the film sunshine.

[Duxwing]

And more of an earth radiation

Cover your walls with lead.

Saturn might be a better choice from a livability perspective, as it has closer to an earth gravity

Quit whining! High gravity make you big and strong!

-Duxwing