Subj : Re: The James Webb Space Telescope
To   : August Abolins
From : Wilfred van Velzen
Date : Mon Dec 27 2021 09:59 pm

Hi August,

On 2021-12-27 20:55:34, you wrote to me:

 AA> How can it be 25% of it's distance at day 3, when it only enters L2 in
 AA> it's 29th day?

I explained that in a previous message: It's slowing down...

 WV> It will take about 29 days to get there. It will take so long to get
 WV> there, because there is no propulsion anymore (except for some short
 WV> burns for course corrections). It's in the balistic fase on it's path
 WV> to it's destination, and because of the gravitational pull of the
 WV> earth it's constantly slowing down slightly. Its speed now is about
 WV> 1.7 km/s relative to earth, while during the launch fase it topped at
 WV> about 10 km/s...

Bye, Wilfred.

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