Hohmann transfer is often used between a lower LEO orbit and MEO, GTO, GEO or beyond.

But if the target is a high altitude within LEO, how would a direct ascent compare to ascent to a lower orbit followed by a Hohmann transfer to the higher one?

  • Would the inclusion of the intra-LEO Hohmann transfer help at all in reducing costs or payload mass?

  • Are there other considerations?

  • $\begingroup$ Hi @RajathPai I've adjusted the wording of your question a bit. I think it hasn't changed your meaning, but if you have a moment can you take a look and double-check? Thanks! $\endgroup$ – uhoh Mar 21 at 10:19
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    $\begingroup$ Can you clarify what you mean by "direct ascent"? A Hohmann transfer in LEO is quick, it just needs 1/2 orbital period, i.e. roughly 1 hour. $\endgroup$ – asdfex Mar 21 at 11:41
  • $\begingroup$ @asdfex a direct ascent means that there is not intermediary parking orbit as is common in the Hohmann transfer. $\endgroup$ – Rajath Pai Mar 21 at 11:47
  • $\begingroup$ You mean like jumping from one orbit to another? There's always an intermediate orbit / trajectory after leaving the original orbit and before entering the new one (unless they intersect at some point) $\endgroup$ – asdfex Mar 21 at 11:49
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    $\begingroup$ @uhoh the question asks about "within LEO", not about starting from Earth. $\endgroup$ – asdfex Mar 21 at 15:56

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