[FPSPACE] Fate of Genesis bus

Paolo Ulivi paolo.ulivi at tiscali.it
Mon Oct 4 06:28:30 EDT 2004

Thank you,
I have seen that a proposal for a follow on Genesis mission (called 
Exodus since Exodus follows Genesis) was put forward. It called for the 
Genesis bus to be put in a Earth trailing orbit where it would cooperate 
with other spacecraft to study the solar wind and interplanetary 
environment. However, it was deemed that the science return did not 
justify the relatively high cost of the mission extension.

Marc D. Rayman wrote:

> As I've seen no response to your question, I'll come out of lurkspace 
> momentarily.
> Genesis was diverted past Earth following the release of the Sample 
> Return Capsule (SRC), and it is in a very high eccentricity orbit, 
> with an apogee around 1 million km.  The maneuver was designed to 
> accommodate two options: 1) safely dispose of the bus in space if the 
> SRC separation were successful, or 2) enable a second entry attempt in 
> March 2005 if the SRC separation were aborted or unsuccessful.
> I don't work on Genesis, but the last I heard, the plan was simply to 
> allow the Sun to pump up the bus' orbital energy, ultimately causing 
> it to escape into a heliocentric Earth-trailing orbit.  Because the 
> spacecraft has more delta-v capability now than when it was launched 
> (the reduction in mass by releasing the SRC more than compensates for 
> the propellant expended during the mission), alternatives were being 
> considered that might involve other substantial changes to its orbit.
> As I understand it, possible uses for the spacecraft include solar 
> wind science (as you point out) and astrodynamics tests.
> Back to lurking...
> Marc Rayman
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