[meteorite-list] NASA Targets Moons of Mars for Potential Robotic Mission
From: Ron Baalke <baalke_at_meteoritecentral.com>
Date: Thu, 3 Apr 2014 13:18:30 -0700 (PDT)
NASA Targets Moons of Mars for Potential Robotic Mission
By Mike Wall
April 3, 2014
Scientists and engineers at NASA's Ames Research Center in Moffett Field,
Calif., are drawing up a low-cost mission concept that would send a robotic
spacecraft to one of Mars' two tiny satellites, Phobos and Deimos.
The probe would be based heavily on the space agency's $280 million Lunar
Atmosphere and Dust Environment Explorer (LADEE), an Ames-led effort that
has been circling Earth's moon since September 2013. [Moons of Mars: Amazing
Photos of Phobos and Deimos]
"We think we can do 'LADEE 2' for a few hundred million [dollars] and
go to Phobos," Ames director Pete Worden said during a presentation in
February at the NASA Innovative Advanced Concepts symposium at Stanford
The original LADEE relies not on custom-crafted, mission-specific infrastructure
but rather an Ames-developed "modular common spacecraft bus" that can
be adapted for a variety of uses and destinations. The modular approach
would help keep the potential LADEE 2's costs down, Worden said.
"We've got some spare hardware hanging around here that we could make
it even lower-cost," he said during a NASA budget news briefing on March
LADEE 2 could launch sometime after NASA's bold asteroid-capture mission,
Worden added. The space agency is still mapping out the details of its
asteroid-redirect effort - which aims to drag a near-Earth space rock
into a stable lunar orbit for future visitation by astronauts - but current
projections call for lofting the capture probe around 2019, with the asteroid
arriving in lunar orbit in 2024 or 2025.
There is no money for LADEE 2 in the NASA budget, Worden stressed, so
it remains a concept mission for now.
"This is one we're very excited about," he said. "We'd like to see it
be a planned mission, but we have some work to do first."
Most scientists think Phobos and Deimos are former asteroids that were
captured by Mars' gravity. Phobos is 14 miles (22 kilometers) wide on
average, while Deimos has a diameter of just 7.7 miles (12.4 km). (For
comparison, Earth's moon is 2,160 miles, or 3,475 km, wide).
A robotic mission to Phobos or Deimos could help pave the way for an eventual
manned trip to one of these moons. The prospect of a human "base camp"
on Phobos or Deimos is enticing to many researchers, who envision teleoperating
rovers on the Martian surface and studying samples launched from the Red
Planet up into orbit. (Phobos orbits a mere 3,700 miles, or 6,000 km,
from Mars; Deimos circles at an average distance of 12,470 miles, or 20,070
NASA officials have said repeatedly that putting boots on Mars is the
long-term goal of the agency's human spaceflight program. But they are
considering manned missions to Phobos or Deimos as a potential precursor,
and possibly as a way to get astronauts to the vicinity of the Red Planet
by the mid-2030s - a goal laid out by President Barack Obama in 2010.
NASA already has two functioning rovers on the Martian surface - Opportunity
and Curiosity - and two operating orbiters, Mars Odyssey and the Mars
Reconnaissance Orbiter. Another orbiter, called MAVEN, launched in November
and is scheduled to arrive in September. The agency also plans to launch
a lander called InSight toward the Red Planet in 2016 and a sample-caching,
Curiosity-like rover in 2020.
Received on Thu 03 Apr 2014 04:18:30 PM PDT