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mars mission

Discussion in 'Space Technology' started by crazydevil, Mar 20, 2012.

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  1. crazydevil

    crazydevil New Member

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    what would be the minimum velocity increment required for a two impulse transfer from earth to mars about the sun??
     
  2. StingrayOZ

    StingrayOZ Well-Known Member

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    Are you asking what would be the velocity for a simple earth - Mars journey? Unmanned, with no time pressure. You could do it over years, decades.

    If you didn't have a two firing mission, then lowest energy would be the inter planetary transport network. I think the original NASA proposals had a possible Venus flyby so the direct route may not always be the best one to take.
     
  3. crazydevil

    crazydevil New Member

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    yes , im talking about simple earth mars journey with no time pressure based on hoffmans transfer.Neglection the escape velocity of earth, we can assume the unmanned aircraft rotating in earths orbit around the sun.From there , with two velocity increments , it can be transferred to the orbit around mars.If so what would be those velocity increments.(im just doing some theoretical work on the same and would love to have your inputs )
     
  4. StingrayOZ

    StingrayOZ Well-Known Member

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    Its been ages since I studied orbital mechanics, I have a feeling its between 3-5.7km/s if you want a single shot from earth orbit. I see a bit of casual googling turns up loads of crap, I can see why your asking. I'll do a journal search at work and have a go at doing a napkin calculation.
     
  5. PhysicsMan

    PhysicsMan New Member

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    Don't be lazy, just wiki "hoffman's transfer" and plug in the numbers, the formula is already there.
     
  6. StingrayOZ

    StingrayOZ Well-Known Member

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    Hmm is this a home work question? Lack of context and how it structured implies yes.

    If you are after the velocity required with instant velocity (ie unrealistic) then it is a simple application of the Hohman (as the new texts call it) orbit formula which is really just the conservation of energy.

    Remember your changing orbits around the sun.

    It however isn't the ideal equation to calculate interplanetary travel because it doesn't take in effect all of the factors that realistically happen.
     
  7. crazydevil

    crazydevil New Member

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    .Ive been reading a little bit about interplanetary orbital transfers in MIT opencourse materials and juz want wanted to calculate theoretically the velocity increments needed for the transfer.I did some vague calculations and got first velcoity increment from orbit of earth around the sun to elliptcal orbit around the sun as 2.9km/s and then to an orbit of mars around the sun as 2.6km/sec(talking into consideration only the conservation of energy).But couldnt find any source to verify my answers.Further i want to add practcality into this theoretical speed to arrive at final speed required and would be great if you guyz could help me out:)
     
  8. Sandhi Yudha

    Sandhi Yudha Member

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    Oke boys, today Mars Science Laboratory will land on the surface of Mars. It will be about 2 hours from now.....cant wait until we receive the first data and pictures.....

    For more info and updates:
    Mars Science Laboratory
     
  9. Sandhi Yudha

    Sandhi Yudha Member

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  10. Belesari

    Belesari New Member

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  11. Sandhi Yudha

    Sandhi Yudha Member

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    In just three days two space probes were inserted in orbit into Mars, the American Maven (22 September) and two days later the Indian Mars Orbiter Mission (MOM), also called Mangalyaan (24 September).

    Maven's mission goals include determining how the Martian atmosphere and water, presumed to have once been substantial, were lost over time.

    MOM has two objectives, first as a technology demonstrator, because its India's first space probe to Mars, and the secondary objective is to explore Mars' surface features, morphology, mineralogy and Martian atmosphere using indigenous scientific instruments. A great job done by the Indians, specially if you look to the quite young history of Indian Space Research Organisation (ISRO).

    NASA's Newest Mars Mission Spacecraft Enters Orbit around Red Planet -- ScienceDaily
    India's First Mars Probe Makes Historic Red Planet Arrival

    Hopefully these probes can finish their missions and provide us a lot of new information and knowledge.
     
  12. gf0012-aust

    gf0012-aust Grumpy Old Man Staff Member Verified Defense Pro

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    that's a job well done by the Indians
     
  13. Ananda

    Ananda Well-Known Member

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    Yes, just visit some other forums where many comments either thrashing Indian achievements or just questioning why a 'poor' third world nation (neglecting India economy size), put so much money on this space program , not on social and poverty eradication.

    This is great achievements for India, why some people simply can not accept that, is beyond me. They manage to send Mars orbiter for the first time and first try, with much cheaper budget than everybody else Mars budget. If that not great achievements for some people, then I don't know what to say.
     
  14. Blackshoe

    Blackshoe Defense Professional Verified Defense Pro

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    Good! Now the ISRO can beg their officials for funds for more missions to Mars (ignoring potentially more productive mission areas) every two years (coincidentally, just within those officials' re-election pattern) just like NASA does./cynicism

    Though, honestly, good on the ISRO and kudos for their accomplishment.
     
  15. Sandhi Yudha

    Sandhi Yudha Member

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    ngatimozart likes this.