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A CubeSat Mission to Phobos Might Map Staging Bases for a Mars Touchdown

December 1, 2024
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A CubeSat Mission to Phobos Might Map Staging Bases for a Mars Touchdown
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The moons of Mars are garnering elevated consideration, not solely as a result of they may present a view of the photo voltaic system’s previous but additionally as a result of they may present invaluable staging areas for any future human settlement on Mars itself. Nonetheless, missions particularly designed to go to Phobos, the larger of the 2 moons, have met with various phases of failure. So why not make a reasonable mission to take action – one that might launch a number of copies of itself if mandatory? That’s the concept behind a CubeSat-based mission to Phobos, often known as Perseus, which was initially described again in 2020.

Phobos is fascinating for a number of causes, however to date, we’ve solely gotten comparatively grainy photos of this small moon, whose whole diameter is the scale of a medium-sized metropolis. Most of these photos have come from Mars orbiters, similar to MRO, who often flip their devices on the opposite our bodies within the system. A number of deliberate missions to go to straight, similar to Phobos 1 and a couple of and, extra just lately, Phobos Grunt, have failed in area, limiting our understanding of this probably useful moon to secondary scraps from bigger missions.

Enter a brand new mission idea—Perseus (which, surprisingly, seems to not be an acronym for something) is designed as a 27U CubeSat that inherits a number of commercial-off-the-shelf (COTS) methods utilized in different interplanetary CubeSat missions, together with its personal propulsion system and distant sensing package. Relying on the funding the mission receives, it may department into one in all two totally different potential interplay kinds with Phobos.

MMX is one other mission to gather precise samples from Phobos, although its launch has been delayed till 2026 on the earliest.

First, the mission design most well-liked by the mission designers, who primarily come from the College of Arizona and Arizona State College, would contain capturing Perseus in a co-orbit with Mars and Phobos. This may permit the CubeSat to cross by the moon day-after-day, with a couple of 6-minute encounter time. This may permit Perseus to seize a number of photos of a number of sides of Phobos, a few of which have by no means been seen earlier than from such a brief vantage level.

The opposite mission idea would put Perseus on a hyperbolic trajectory previous Phobos itself. On this idea, Perseus would solely get a single 2-minute flyby with the moon however may get a lot nearer, and due to this fact increased decision, photos of a selected space it selected to fly by. It might then be flung into the photo voltaic system, ultimately operating out of gas. Saving the price of the bigger gas load for the orbital mission idea is the principle motive for designing the much less scientifically thrilling flyby choice.

With the orbital mission idea, Perseus may accumulate seen gentle photos of the floor of Phobos all the way down to 5m per pixel and thermal photos of 25 m per one pixel, as its scientific payload would encompass seen gentle and thermal imagers. That’s about 6 occasions higher in seen gentle than the 30 m / pixel, which is one of the best info now we have from a picture from HiRISE on the Mar Reconnaissance Orbiter.

Fraser makes the case for sending people to the Martian moons first.

That stage of decision may additional discover some options of Phobos, such because the “grooves” that dominate its floor. Moreover, Perseus may scout potential touchdown websites for future human missions to arrange for a go to to the Crimson Planet.

Nonetheless, the actual advantage of Perseus is that it’s comparatively low-cost. Whereas comparatively massive by CubeSat requirements at 54 kg and a 27U configuration, many parts’ flight heritage means it will be comparatively low-cost to assemble and take a look at. Nonetheless, the mission has not been granted any funding to date, and a quick literature search doesn’t present any further work on the mission within the final a number of years. However, it suits nicely with the development in direction of smaller, much less dangerous, and cheaper missions. Possibly sometime, an analogous one will get the inexperienced gentle, and we are able to lastly begin gathering some detailed gentle from one of the vital necessary moons within the photo voltaic system.

Study Extra:
Nallapu et al. – Trajectory design of perseus: A cubesat mission concept to Phobos
UT – What Might We Study From a Mission to Phobos?
UT – How Mars’ Moon Phobos Captures Our Imaginations
UT – Did An Historical Icy Impactor Create the Martian Moons?

Lead Picture:
Engineering Mannequin of the Perseus Spacecraft.
Credit score – Nallapu et al.

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