From: http://www.planetary.org/blogs/emily-lakdawalla/2019/mu69-baby-comet-contact-binary.htmlVery odd. Closest approach was on Wed 3rd Jan but their NH twitter feed is still pumping out the boring "snowman" image from 1st Jan.
What is going on here? Has the data link gone down or are NASA playing hide-and-seek with the publicly owned images again?
No further images will come to Earth from New Horizons until January 10 because the spacecraft is behind the Sun, making radio communication error-prone.
My gravity number is 4 times larger than yours at the Thule end.At the far end of Thule, the required centripetal force increases to 0.00025 m/s2 and gravity decreases to 0.0007m/s2
Coincidence. The main trajectory was based on the Pluto approach, afterwards they searched for something that can be reached with minimal fuel consumption.Ah thanks. Since we are at perihelion now that means this MU69 object is almost exactly along the Earth's line of apsides. Coincidence, or did they chose that path out of the inner SS for a specific reason? It will be interesting to see more detail over the next few weeks.
You are using billiard ball physics but your "centre" of mass seems to be at the point they touch.Well, I found a gravity bug in my method, yielding somewhat different numbers.
My gravity number is 4 times larger than yours at the Thule end.
Even discounting the gravity from Ultima, my value is still 3 times higher than yours.
g = 1.5e15 kg * 6.674e-11 / (7000 m)^2 = 0.002043 m/s^2
0.002043 / 0.0007 = 2.9
What am I doing wrong?