I'd pick Toriga V myself :
Low gravity and dense atmosphere will make our landing much more easier.
Low gravity = less energy spent on many industrial tasks (
Low gravity = getting back into space later is MUCH easier. I am not saying that we will launch outpost ship back, but we may build other spaceships later
No volcanism and stable if severe weather = smaller number of accidents
No alien life = No alien deceases.
Far from the star = We are less dependent on it's activity, we don't know anything about it
Hellium in atmosphere = He3 is available for our reactors
Toriga V has a temperature of only 60 Kelvin. That is unacceptably low. As in, not even the ship can survive it low. While space is far colder, the combination of dense athmosphere + cold temperatures is a killer
q = hc A dT (1)
where
q = heat transferred per unit time (W)
A = heat transfer area of the surface (m2) ((I have no idea how big our ship is, so I'll be calculating loss per m²))
hc= convective heat transfer coefficient of the process (W/m2K or W/m2oC) ((Air typically has somewhere around 5 - 25 (W/m2K) With similar atmospheric density, I think we can assume to get at least 2.5))
dT = temperature difference between the surface and the bulk fluid (K or oC) ((Assuming hull surface temperature of 0°Celsuis We get a difference of 213 degrees))
==> We have a constant drain of energy of 532 Watt per square meter. This is way beyond suit or craft tolerances, and with a ship power output of 150 MW (Assuming 33% efficiency, 450 MW thermal), we can sustain about 850000 square meters. This is not as much as you'd think. If our ship were a perfect circle (most efficient form), it'd could have a max radius of only 260 m², with a volume of 70000000 m³.
So we could perhaps do it, but the cold will inflict significant problems, and going out will be practically impossible. Not to mention that we will likely cause our own weather phenomena.
Also, alien diseases are impossible. Any alien lifeforms on the planet did not evolve to be even remotely similar to us.
Lastly: Helium-3 =/= Helium. There's a good chance they're both present but there's no guarantee. Additionally, isotopic abundances learns us that 0.01 ppm is a lot for Helium 3. Besides, we can't really harvest it due to the temperatures
We can't really do mining on asteroids or moons. We just don't have the gear. We don't have the space needed to set up the factory, assemble anything, or house minerals. Sure if we can, do so, but I really doubt it. Besides, IIRC, an airlock is not included in the cargo sections, you have to partially dismantle the ship to get the larger pieces out.
Well, first off: yay! We discovered alien life! Also, maybe it would be prudent to contact the other Outposts? Do we have FTL communication capabilities? Depending on what planets they settled on (our journey took a long time, so some of them may already be up and running at full speed) they may have trade goods, the availability of which may better inform our decision of which planet to settle on.
Also, we should brag about our discovery!
Edit: Toriga I is my gut instinct.
We don't have anything to transmit with, they don't have anything to receive with (well perhaps by this point they have). FTL communication abilities don't exist in this setting;
Also, our voyage took 50 years, even with significant advancement, we can't even expect an answer within the decade, let alone an actual ship.
I'm torn between I & II.
I has a nice atmosphere, but i'm a little worried about the probable lack of minerals and the
relatively high radiation levels
How high, exactly?
II has a workable atmosphere (Outpost 3 used Argon + Oxygen I think) and large amounts of easily accessable rare materials. Which means easy access to Advanced Parts and Advanced Technology. Volcanic activity is a little worrying though.
On the whole I'm leaning slightly towards II. Easy and early access to rare materials (and probably undiscovered ones as well) will nullify us using only our Adv. Parts stockpile for the probable duration of the game. Better in the mid-long run, we should have the technology to overcome the disadvantages (Advanced technology, at that)
You don't need argon for an athmosphere. Nitrogen works just fine, and is what our own Earth athmosphere is predominatly made off.
Also, -80 degrees Celsius is again rather cold.
We have the advanced sensor set thingy installed, we really should be able to get a little better detail.