≡ Menu

NASA’s LADEE Probe Starts Science Study of Thin Lunar Atmosphere and Dusty Mystery

Artist’s concept of NASA's Lunar Atmosphere and Dust Environment Explorer (LADEE) spacecraft in orbit above the moon as dust scatters light during the lunar sunset. Credit: NASA Ames / Dana Berry

Artist’s concept of NASA’s Lunar Atmosphere and Dust Environment Explorer (LADEE) spacecraft in orbit above the moon as dust scatters light during the lunar sunset. Credit: NASA Ames / Dana Berry

KENNEDY SPACE CENTER, FL – NASA’s Lunar Atmosphere and Dust Environment Explorer (LADEE) has descended to its planned low altitude orbit and begun capturing science data on its ground breaking mission to study the Moon’s ultra tenuous atmosphere and dust using a spacecraft based on a revolutionary new design aimed at speeding development and cutting costs.

LADEE set sail for Earth’s nearest neighbor during a spectacular night time launch atop the maiden flight of an Air Force Minotaur V rocket on Sept. 6 from NASA’s Wallops Island launch facility on Virginia’s Eastern shore.

The flawless launch thrilled spectators up and down virtually the entire US East coast region and yielded many memorable snapshots.

Following a month long voyage and three and a half long looping orbits of the Earth, LADEE successfully fired its main engine for 4 minutes and 12 seconds on Oct. 6 and successfully entered lunar orbit, Dawn McIntosh, LADEE deputy project manager at NASA Ames Research Center, told Universe Today in an exclusive interview.

A series of engine firings over the past month gradually circularized and lowered LADEE into its final science orbit around our Moon while engineers checked out the spacecraft during the commissioning phase of the mission.

The do or die initial Lunar Orbit Insertion burn (LOI-1) allowed LADEE to be captured into a highly elliptical, equatorial lunar orbit, said McIntosh.

Launch of NASA’s LADEE lunar orbiter on Friday night Sept. 6, at 11:27 p.m. EDT on the maiden flight of the Minotaur V rocket from NASA Wallops, Virginia. Credit: Ken Kremer/kenkremer.com

Launch of NASA’s LADEE lunar orbiter on Friday night Sept. 6, at 11:27 p.m. EDT on the maiden flight of the Minotaur V rocket from NASA Wallops, Virginia. Credit: Ken Kremer/kenkremer.com

“Two additional LOI burns on Oct. 6 and Oct 9 lowered LADEE to an approximately 4 hour orbit with a periapsis altitude of 234 Kilometers (km) and apoapsis altitude of 250 km” McIntosh told me.

The trio of LOI main engine firings used up most of LADEE’s precious on board fuel.

“LADEE launched with 134.5 kilograms (kg) of fuel. Post LOI-3, 80% of our fuel has been consumed,” said McIntosh.

“Additional orbit-lowering maneuvers with the orbital control system (OCS) and reaction control system (RCS) of approximately 40 seconds were used to get LADEE into the science orbit.

The spacecraft finally entered its planned two hour science orbit around the moon’s equator on Nov. 20.

Its flying at an extremely low altitude ranging from merely eight to 37 miles (12-60 kilometers) above the moon’s surface.

By circling in this very low altitude equatorial orbit, the washing machine sized probe will make frequent passes crossing from lunar day to lunar night enabling it to precisely measure changes and processes occurring within the moon’s tenuous atmosphere while simultaneously sniffing for uplifted lunar dust in the lunar sky.

The remaining fuel will be used to maintain LADEE’s orbit during the approximately 100 day long science mission. The mission length is dictated by the residual fuel available for thruster firings.

LADEE Science Instrument locations

LADEE Science Instrument locations

The purpose of LADEE is to collect data that will inform scientists in unprecedented detail about the ultra thin lunar atmosphere, environmental influences on lunar dust and conditions near the surface. In turn this will lead to a better understanding of other planetary bodies in our solar system and beyond.

“A thorough understanding of the characteristics of our lunar neighbor will help researchers understand other small bodies in the solar system, such as asteroids, Mercury, and the moons of outer planets,” said Sarah Noble, LADEE program scientist at NASA Headquarters in Washington.

By studying the raised dust, scientists also hope to solve a 40 year old mystery – Why did the Apollo astronauts and early unmanned landers see a glow of rays and streamers at the moon’s horizon stretching high into the lunar sky.

The $280 million probe is built on a revolutionary ‘modular common spacecraft bus’, or body, that could dramatically cut the cost of exploring space and also be utilized on space probes to explore a wide variety of inviting targets in the solar system.

“LADEE is the first in a new class of interplanetary exploration missions,” NASA Ames Director Worden told Universe Today. “It will study the pristine moon to study significant questions.”

“This is probably our last best chance to study the pristine Moon before there is a lot of human activity there changing things.”

LADEE_Poster_01

The 844 pound (383 kg) robot explorer was assembled at NASA’s Ames Research Center, Moffett Field, Calif., and is a cooperative project with NASA Goddard Spaceflight Center in Maryland.

LADEE arrived at the Moon last month in the midst of the US government shutdown – which negatively impacted a host of other NASA missions. Only a ‘skeleton crew’ was available.

“All burns went super well,” Worden told me. And he is extremely proud of the entire team of “dedicated” professional men and women who made it possible during the shutdown.

“It says a lot about our people’s dedication and capability when a skeleton crew’ can get a new spacecraft into lunar orbit and fully commissioned in the face of a shutdown!” Worden said to Universe Today.

Now the real science begins for LADEE and the team.

Stay tuned here for continuing LADEE news

Ken Kremer

…………….

Learn more about LADEE, MAVEN, MOM, Mars rovers, Orion and more at Ken’s upcoming presentations

Nov 22-25: “SpaceX launch, MAVEN Mars Launch and Curiosity Explores Mars, Orion and NASA’s Future”, Kennedy Space Center Quality Inn, Titusville, FL, 8 PM

Dec 11: “Curiosity, MAVEN and the Search for Life on Mars”, “LADEE & Antares ISS Launches from Virginia”, Rittenhouse Astronomical Society, Franklin Institute, Phila, PA, 8 PM

About 

Dr. Ken Kremer is a speaker, scientist, freelance science journalist (Princeton, NJ) and photographer whose articles, space exploration images and Mars mosaics have appeared in magazines, books, websites and calanders including Astronomy Picture of the Day, NBC, BBC, SPACE.com, Spaceflight Now and the covers of Aviation Week & Space Technology, Spaceflight and the Explorers Club magazines. Ken has presented at numerous educational institutions, civic & religious organizations, museums and astronomy clubs. Ken has reported first hand from the Kennedy Space Center, Cape Canaveral and NASA Wallops on over 40 launches including 8 shuttle launches. He lectures on both Human and Robotic spaceflight - www.kenkremer.com. Follow Ken on Facebook and Twitter

Comments on this entry are closed.

  • James November 23, 2013, 4:51 PM

    Would you be more specific, in as what activity you mean by “This is probably our last best chance to study the pristine Moon before there is a lot of human activity there changing things.”, please.

    Read more: http://www.universetoday.com/105688/nasas-ladee-probe-starts-science-study-of-thin-lunar-atmosphere-and-dusty-mystery/#ixzz2lVY4drfn

    • M Peter Selman November 24, 2013, 2:33 AM

      China will launch a lunar lander, Chang’e 3, early this December. Jeff Plescia, scientist at Johns Hopkins University’s Applied Physics Laboratory said the lander’s arrival…

      “…could severely compromise the LADEE mission” due to “significant contamination of the lunar exosphere by the propellant.”

      So LADEE might not have enough time to analyze and determine the properties of the lunar exosphere in its natural, undisturbed state. Then again, the Chinese lander’s exhaust might be used to determine how fast the atmosphere is carried away.

  • Aqua4U November 23, 2013, 5:00 PM

    This is a really cool and very important mission.. I can’t wait to see some of the science! Yet I am surprised by this statement: “…used up most of LADEE’s precious on board fuel.” I’d assumed there would be enough fuel on board for whatever orbital corrections would be required for a long duration mission? Low lunar orbit(s) are plagued by mascons, or gravitational anomalies that tend to alter spacecraft orbits and therefore require constant impulses to adjust or compensate.

    • Olaf2 November 24, 2013, 1:44 PM

      Most of its fuel was intended to slow down and get in orbit around the moon.
      That fuel was not wasted but put to good use.

      Most gravitational anomalies is mostly caused by Earth-Sun-Moon dynamics.

      • Grimbold November 24, 2013, 6:13 PM

        The moon’s gravitational field is uneven because the lunar crust and mantle are not uniform density. Since LADEE orbits so close to the moon’s surface, these effects become more important.

      • Aqua4U November 25, 2013, 11:53 AM

        “Large concentrations of mass lurk on the lunar surface hidden like coral reefs beneath the ocean waves – an unseen and devastating hazard. These concentrations change the gravity field and can either pull a spacecraft in or push it off course, sealing its fate to a crash on the moon.” http://phys.org/news/2013-05-team-moon-mascons-mystery.html

  • Grip Down November 24, 2013, 4:50 PM

    Would you be more specific, in as what activity you mean by “This is probably our last best chance to study the pristine Moon before there is a lot of human activity there changing things.”, please.

    Read more:http://www.tradingstuff.org

  • Bill Fauber November 25, 2013, 8:50 PM

    It
    appears from the illustration in this article the LADEE has camera’s onboard, looks
    like a Hi Def telephoto and Hi Def panoramic cameras. Does anyone know why no one mentioned the cameras and will we have new photos from the Moon.

  • Bill Fauber November 25, 2013, 8:54 PM

    It appears from the illustration in this article the LADEE has cameras onboard, looks like a Hi Def telephoto and Hi Def panoramic cameras. Why is it the camera are not mentioned, will we have new photos from the Moon?.

hide