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Mission To Sedna, space mission to sedna
K-P
post Jan 13 2008, 12:51 PM
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I have tried to search but could not see any serious planning of sending a fly-by mission to Sedna. Does anyone have any info if the scientific community is planning such...?

In my opinion, Sedna would be very interesting target, far more interesting than any KBO etc. The fact that it spends most of the time outside heliopause under the influence of cosmic rays during aphelion could reveal some interesting results and also the reddish colour it has might be worth investigating. And good for us, at the moment it is approaching its closest point to Sun on its orbit, so mission to Sedna would not be such a big effort if done e.g. a'la NH with Jupiter gravity assist...? Maybe possible NH2 could be sent that direction.......?

Any comments, any info? Especially the fact that it is a body from outside the heliopause, could that add some interest towards it?


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stevesliva
post Jan 13 2008, 08:33 PM
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Jupiter-Sun gravity assist can get you going even faster. Of course the flyby will then be extremely brief.
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ugordan
post Jan 13 2008, 08:46 PM
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How can you use Sun in a gravity assist? That's like using Earth in a gravity assist to get to the Moon. Unless you're thinking of a solar sail or ion engine providing delta-V during the Sun "flyby" in which case it makes a bit sense.


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stevesliva
post Jan 14 2008, 02:34 AM
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QUOTE (ugordan @ Jan 13 2008, 03:46 PM) *
How can you use Sun in a gravity assist? That's like using Earth in a gravity assist to get to the Moon. Unless you're thinking of a solar sail or ion engine providing delta-V during the Sun "flyby" in which case it makes a bit sense.


Can't say I really know all the details-- Any gravity assist needs some sort of delta-V in the well, right? I think the Jupiter-Sun dual gravity assist was suggested for some interstellar probe. And I think it jettisoned a sun-shield when passing the sun, so there was delta-mass as well.
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cawest
post Jan 14 2008, 06:34 AM
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QUOTE (stevesliva @ Jan 14 2008, 03:34 AM) *
Can't say I really know all the details-- Any gravity assist needs some sort of delta-V in the well, right? I think the Jupiter-Sun dual gravity assist was suggested for some interstellar probe. And I think it jettisoned a sun-shield when passing the sun, so there was delta-mass as well.



when will a "Grand Tour" set be available next? that would add alot of Dv, like the Voyagers.
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Posts in this topic
- K-P   Mission To Sedna   Jan 13 2008, 12:51 PM
- - J.J.   Unfortunately, I don't see this happening any ...   Jan 13 2008, 02:57 PM
|- - K-P   I don't think that the roughly 80-90 AU distan...   Jan 13 2008, 07:08 PM
- - Greg Hullender   Jupiter can speed you up or get you off the eclipt...   Jan 13 2008, 08:01 PM
- - stevesliva   Jupiter-Sun gravity assist can get you going even ...   Jan 13 2008, 08:33 PM
|- - ugordan   How can you use Sun in a gravity assist? That...   Jan 13 2008, 08:46 PM
|- - stevesliva   QUOTE (ugordan @ Jan 13 2008, 03:46 PM) H...   Jan 14 2008, 02:34 AM
||- - cawest   QUOTE (stevesliva @ Jan 14 2008, 03:34 AM...   Jan 14 2008, 06:34 AM
|||- - Greg Hullender   QUOTE (cawest @ Jan 13 2008, 10:34 PM) wh...   Jan 14 2008, 05:55 PM
|||- - ugordan   Does anyone know how much heliocentric escape velo...   Jan 14 2008, 09:53 PM
||- - ugordan   QUOTE (stevesliva @ Jan 14 2008, 03:34 AM...   Jan 14 2008, 09:18 AM
|- - Greg Hullender   QUOTE (ugordan @ Jan 13 2008, 12:46 PM) H...   Jan 14 2008, 05:51 PM
- - ngunn   We had a 'what missions would you like to see...   Jan 13 2008, 09:09 PM
- - cawest   i would not expect to see a mission to Sedna till ...   Jan 14 2008, 02:15 AM
- - stevesliva   There are some more details (and numbers for Ulyss...   Jan 14 2008, 10:14 PM
- - ugordan   QUOTE (stevesliva @ Jan 14 2008, 11:14 PM...   Jan 14 2008, 10:28 PM
- - JRehling   At least solar radiation would not be in short sup...   Jan 14 2008, 10:45 PM
- - ugordan   True, but one has to think about how hot the semic...   Jan 14 2008, 11:01 PM


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