The number and total mass of high value near-Earth asteroids (NEOs) are limited. If space exploration and mining becomes profitable then at some point it will benefit from moving on to the far greater resources of the Main Belt Asteroids (MBAs). Most MBAs are energetically too hard to reach with present technology from low Earth orbit. An alternative is to use Mars orbit as a base from which to conduct MBA research, prospecting, and mining. We have developed PARC: Python Asteroid Rendezvous Code which uses a fast Lambert's problem solver and straightforward maneuver schemes to survey the delta-v necessary to rendezvous with any known asteroid from either Earth or Mars orbit given a specified launch date and time of flight. We used PARC to investigate whether Phobos-like orbits around Mars at altitudes of ∼9000 km, are more energetically favorable and useful locations from which to dispatch missions to MBAs. We find that they are. From a Phobos-like orbit, around 100,000 known MBAs have delta-v 4 km s−1 and some 340,000 have delta-v 5 km s−1, nearly a thousand times that of NEOs. Unsurprisingly, the most accessible MBAs have low inclinations (i < 5 deg) and small semi-major axes (2.0 < a < 2.5 AU). Known MBAs are much larger than NEOs, so the total mass that is accessible is larger by ∼10,000 times the accessible mass in NEOs. As a result, a growing economy that utilizes space resources or large scale exploration missions will likely find Mars orbit convenient. The stable platform and modest gravity afforded by Phobos would make it a natural first choice. Once Mars orbit has a profitable economy, with high value trans-shipments, the Martian surface may also become an economically valuable outpost. This value may then stimulate settlement.
Phobos has abundant oxygen and may have water to allow for production of hydrolox fuel.
Quote from: TrevorMonty on 04/26/2023 11:30 amPhobos has abundant oxygen and may have water to allow for production of hydrolox fuel."Deimos is hydrated."
Quote from: LMT on 04/28/2023 03:50 pmQuote from: TrevorMonty on 04/26/2023 11:30 amPhobos has abundant oxygen and may have water to allow for production of hydrolox fuel."Deimos is hydrated."The recent images taken of Deimos by the Emirates Hope orbiter seems to indicated a lack of volatile materials on Deimos.
The best case for reproducing the moons' proposed [icy] compositions are the 70% and 90% water-ice mantle impactor cases, as they allow for low disk temperatures and more chances for chondritic materials to survive......in the early solar system, during the time this Mars impact may have occurred, an object with around 70% water ice may have been feasible. This impactor would have come from the outer solar system around the time of giant planet instability, in which outer solar system bodies were flung into the inner solar system...