Moon Mineralogy Mapper

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Moon Mineralogy Mapper
Moon Mineralogy Mapper left.jpg
Left side of the Moon Mineralogy Mapper
Operator NASA
Manufacturer JPL
Instrument type Imaging spectrometer
Mission duration712 days (planned)
333 (actual)
Began operationsNovember 12, 2008 (2008-11-12)
Ceased operationsSeptember 20, 2009 (2009-09-20)
Website www.jpl.nasa.gov/missions/moon-mineralogy-mapper-m3/
Properties
Mass8.2 kg (18 lb)
Resolution40 km (25 mi) (field of view)
140 m (460 ft) (global)
70 m (230 ft) (targeted)
Host spacecraft
Spacecraft Chandrayaan-1
Operator ISRO
Launch date00:52,October 22, 2008(UTC) (2008-10-22T00:52Z)
Rocket PSLV-C11
Launch site Satish Dhawan Space Centre
COSPAR ID 2008-052A

The Moon Mineralogy Mapper (M3) is one of two instruments of NASA that was carried by India's first mission to the Moon, Chandrayaan-1, launched October 22, 2008. It is an imaging spectrometer, and the team is led by Principal investigator Carle Pieters of Brown University, and managed by NASA's Jet Propulsion Laboratory.

Contents

Description

M3Performance/units [1] [2]
Type Imaging spectrometer
Spectral range430–3,000 nm
Spectral channels260 (10 nm/channel)
Field of view 40 km
Resolution70 m/pixel
Mass8.2 kg
Power<20 W
Dimensions50 × 50 × 50 cm

M3 is an imaging spectrometer that provided the first high-resolution spatial and spectral map of the entire lunar surface, revealing the minerals of which it is made. This information will both provide clues to the early development of the Solar System and guide future astronauts to stores of precious resources.

This instrument is a Discovery Program "Mission of Opportunity" (a NASA-designed instrument on board another space agency's spacecraft).

Chandrayaan-1 operated for 312 days as opposed to the intended two years but the mission achieved many of its planned objectives. [3] M3 was used to map over 95% of the lunar surface in its low-resolution Global mode, but only a small fraction in the high-resolution Target mode. [4] After suffering from several technical issues including failure of the star sensors and poor thermal shielding, Chandrayaan-1 stopped sending radio signals at 1:30 AM IST on 29 August 2009 shortly after which, the ISRO officially declared the mission over.

Science team

Mosaic of images of the Moon taken by the Moon Mineralogy Mapper. Blue shows the signature of water, green shows the brightness of the surface as measured by reflected infra-red radiation from the sun and red shows an iron-bearing mineral called pyroxene. Water Detected at High Latitudes on the Moon.jpg
Mosaic of images of the Moon taken by the Moon Mineralogy Mapper. Blue shows the signature of water, green shows the brightness of the surface as measured by reflected infra-red radiation from the sun and red shows an iron-bearing mineral called pyroxene.

Water discovered on Moon

These images show water in a very young lunar crater on the side of the Moon that faces away from Earth. Water Around Fresh Moon Crater.jpg
These images show water in a very young lunar crater on the side of the Moon that faces away from Earth.

On September 24, 2009, Science magazine reported that NASA's Moon Mineralogy Mapper (M3) on Chandrayaan-1 had detected water on the Moon. [5] But, on 25 September 2009, ISRO announced that the MIP, another instrument on-board Chandrayaan-1 also had discovered water on the Moon just before impact and had discovered it before M3. The announcement of this discovery was not made until NASA confirmed it. [6] [7]

M3 detected absorption features near 2.8–3.0 μm on the surface of the Moon. For silicate bodies, such features are typically attributed to OH- and/or H2O-bearing materials. On the Moon, the feature is seen as a widely distributed absorption that appears strongest at cooler high latitudes and at several fresh feldspathic craters. The general lack of correlation of this feature in sunlit M3 data with neutron spectrometer H abundance data suggests that the formation and retention of OH and H2O is an ongoing surficial process. OH/H2O production processes may feed polar cold traps and make the lunar regolith a candidate source of volatiles for human exploration.

The Moon Mineralogy Mapper (M3), an imaging spectrometer, was one of the 11 instruments on board Chandrayaan-I that came to a premature end on August 29. M3 was aimed at providing the first mineral map of the entire lunar surface.

Lunar scientists have for decades contended with the possibility of water repositories. They are now increasingly "confident that the decades-long debate is over," a report says. "The moon, in fact, has water in all sorts of places; not just locked up in minerals, but scattered throughout the broken-up surface, and, potentially, in blocks or sheets of ice at depth." The results from the NASA's Lunar Reconnaissance Orbiter are also "offering a wide array of watery signals." [8]

The detailed analysis of the full set of Moon Mineralogy Mapper data in 2018 has yielded multiple locations with water ice concentrations at the surface ranging from 2% to 30%, at latitudes above 70 degrees. Surprisingly, some of the known "cold traps", including the impact site of the LCROSS spent stage, have failed to detect surface ice. [9]

Mg-spinel-rich rock discovered

M3 found a rock dominated by Mg-spinel with no detectable pyroxene or olivine present (<5%) occurring along the western inner ring of Moscoviense Basin (as one of several discrete areas). The occurrence of this spinel does not easily fit with current lunar-crustal evolution models. [10]

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References

  1. ↑ The Moon Mineralogy Mapper (M3) imaging spectrometer for lunar science: Instrument description, calibration, on‐orbit measurements, science data calibration and on‐orbit validation . R. O. Green, C. Pieters, P. Mouroulis, etal. Journal of Geophysical Research. 29 October 2011. doi : 10.1029/2011JE003797
  2. ↑ The Moon Mineralogy Mapper (M3) on Chandrayaan-1. (PDF). Carle M. Pieters1, Joseph Boardman, etal.
  3. ↑ "India likely to land on Moon on September 6". The Times of India. May 2, 2019. Retrieved January 12, 2023. Chandrayaan operated for 312 days as opposed to the intended two years but the mission achieved 95% of its planned objectives
  4. ↑ Boardman, Joe. "A New Lunar Globe as Seen by the Moon Mineralogy Mapper: Image Coverage, Spectral Dimensionality and Statistical Anomalies" (PDF). LPI. Archived from the original (PDF) on 16 July 2019. Retrieved 12 April 2011.
  5. ↑ "http://www.sciencemag.org/cgi/content/abstract/sci;1178658v1"
  6. ↑ "Chandrayaan first discovered water on moon, but?". DNA . Bangalore. DNA. Sep 25, 2009. Retrieved 2013-06-09.
  7. ↑ Bagla, Pallav (September 25, 2009). "Did India beat NASA to find water on moon?". NDTV . Bangalore. Retrieved 2013-06-09.
  8. ↑ "Water discovered on moon?: "A lot of it actually"". The Hindu . Chennai, India. 23 September 2009. Archived from the original on 26 September 2009.
  9. ↑ Li, Shuai; Lucey, Paul G.; Ralph E., Milliken (20 August 2018). "Direct evidence of surface exposed water ice in the lunar polar regions". Proceedings of the National Academy of Sciences. 115 (36). National Academy of Sciences: 8907–8912. Bibcode:2018PNAS..115.8907L. doi: 10.1073/pnas.1802345115 . PMC   6130389 . PMID   30126996.
  10. ↑ Pieters, Carle. "Identification of a new spinel-rich lunar rock type by the Moon Mineralogy Mapper (M3)" (PDF). LPI. Retrieved 12 April 2011.
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