In article ,
says...

On 2018-08-13 02:47, Niklas Holsti wrote:

And it took a hulking big launcher, plus AIUI an extra final rocket
stage, to give this small probe enough delta-v for that.

My question pertains to what direction this delta-v is being applied.
Straight to the sun to cause elliptical orbit?


or retrogade to slow the proble's speed around the sun so it drops orbit?

Google it. Look for Hohmann Transfer Orbit. Pay particular attention
to the directions of the applied delta-V.

Jeff
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