Game time is not GMT. There's an hour difference due to Daylight Savings Time. I never specified a time zone since the game clock isn't set to a specific time zone.
So yeah, all times are based on the in game clock display in the cockpit. It's too much work to translate to my time zone or any others. I'm GMT -8, but actually because of DST I might actually be GMT -7 right now. Too much room for confusion.
And FYI. The distance display to the B moon just switched from reading in Ls to reading in Mm
It switched over from 0.10Ls to 30.0Mm at 20:11:21 and then to 29.9Mm at 20:14:36, 29.8Mm at 20:25:40 and 29.7Mm at 20:36:40. So it's moving at ~100Km every 11m and speeding up slightly at this time in the orbit.
The speed varies depending on where the moons are in their orbit, so I need to average the speed over 1 full orbit or 1.4 days.
I should have some more accurate numbers tomorrow since I have better resolution now on the distance and it will click over tenths of Mm quicker so I don't have to watch for 5 hours to see the number change.
P.S. Where I'm parked, the moon was dipping down below the horizon and is now staring to rise back up as it gets closer. So at this point in the orbit I think the approach is effectively linear. There's not much of a curve left between them.
Also note that the radius of the B moon is 1,347 km so the moon will be in contact at a distance of 1.347Mm, as measured from the surface of the C moon.
P.P.S. Over the past 67.7 hours the average speed is 0.001391 Ls/hr or 0.416983 Mm/hr
So I make it 68.7151 hours to collision from 12 Oct 20:11:21 (2d 20h 42m) which is October 15 at 16:53:21 pm
The variability of the calculation each time is a bit frustrating but because of the orbital speed and distance variation of the moons and the rounding of the numbers, I don't know how to be more accurate.
Disclaimer: Due to inherent inaccuracies in the measurements, give or take a couple of hours from my prediction. Also, I'm no mathematician, so I could have made a mistake in my calculations or logic that may result in my prediction being completely wrong.
Update: 21.8Mm away at 13:01:20 (13 Oct), 16.8h average speed of 0.487137Mm/hr
Update: 18.3Mm away at 00:25:50 (14 Oct), 28.2h average speed of 0.414286Mm/hr
Update: 15.7Mm away at 05:56:51 (14 Oct), 33.8h average speed of 0.423599Mm/hr