I'm scratching my head as to why my Jump Stabilisation Ship is tracted at a meager 342 km/s. Is there a penalty at some point if the masses of the two ships are vastly different? 
My Tug is 10,000 tons and has a speed of 2400 km/s. My Bïfrost JSS has a base speed of 333 km/s. So what gives? 

TG-01 Sheperd 001  (Sheperd class Tug)      10 000 tons       114 Crew       360.5 BP       TCS 200    TH 480    EM 0
2400 km/s      Armour 1-41       Shields 0-0       HTK 47      Sensors 5/0/0/0      DCR 1-1      PPV 0
MSP 132    Max Repair 100 MSP
Tractor Beam     
Lieutenant Commander    Control Rating 1   BRG   
Intended Deployment Time: 3 months   
● Recreation Room-25    ● Library-25    2x ● Escape Pod-5    ● Security hardpoint-5   

Honeywell Aero Nuclear Thermal Engine C80 (6)    Power 480    Fuel Use 10.06%    Signature 80    Explosion 5%
Fuel Capacity 850 000 Litres    Range 152.1 billion km (733 days at full power)
Refuelling Capability: 50 000 litres per hour     Complete Refuel 17 hours

Silas-Nein Small Thermal Sensor 1-5 (1)     Sensitivity 5     Detect Sig Strength 1000:  17.7m km

This design is classed as a Commercial Vessel for maintenance purposes
This design is classed as a Tug for auto-assignment purposes

JSS-01 Bifröst 001  (Bifröst class Jump Stabilisation Station)      60 000 tons       197 Crew       1 384.8 BP       TCS 1 200    TH 400    EM 0
333 km/s      Armour 1-136       Shields 0-0       HTK 52      Sensors 5/0/0/0      DCR 1-0      PPV 0
MSP 24    Max Repair 1 000 MSP
Commander    Control Rating 2   BRG   AUX   
Intended Deployment Time: 3 months   
Jump Point Stabilisation: 180 days
● Large Crew Lounge-100    ● Onboard Hospital-50    ● Recreation Room-25    2x ● Security hardpoint-5    9x ● Escape Pod-5    3x ● Medium Hydroponics-50    ● Promenade-50    ● Fitness Center-50    ● Library-25    ● Small Armory-5   

Honeywell Aero Nuclear Thermal Engine C80 (5)    Power 400    Fuel Use 10.06%    Signature 80    Explosion 5%
Fuel Capacity 1 400 000 Litres    Range 41.7 billion km (1449 days at full power)
Refuelling Capability: 50 000 litres per hour     Complete Refuel 28 hours

Silas-Nein Small Thermal Sensor 1-5 (1)     Sensitivity 5     Detect Sig Strength 1000:  17.7m km

This design is classed as a Commercial Vessel for maintenance purposes
This design is classed as a Stabilisation Ship for auto-assignment purposes


Does anyone know the calculation for the current base temperature of a system body?
I suspect it's a simple matter of star brightness and current distance from star.

Prior to eccentric orbits, the base temperature of a body never varied, so I could just use the value of FCT_SystemBody.BaseTemperature.
But that value seems not to vary over time.

Have to ask, there are Troops actually aboard said ship?

Asking from experience...

Yes yes there were troops aboard 

I figured out the issue, I had to create a colony before, Jesus Christ.

Have to ask, there are Troops actually aboard said ship?

Asking from experience...

2 - How do you see the details of ground units embarked in TT module? I would like to add a 100-tons TT module on each of my medium+ warships, but it seems you don't know much about the troop once it is boarded.

You can see some information in the "Transported Items" tab on the naval organization window. You can also see the entire formation detail on the Ground Forces window, OOB tab, if you check the box to show units on ships (which is off by default).

As an aside, while 100 tons is probably fine for ship's defense squads, I would probably suggest using 200 tons if you want to conduct boarding actions, as I've found in practice that 100 tons is a bit too small for most typical ship sizes you might want to capture.