Photometric and Color Properties of Contemporary Lunar Impacts

Speyerer, E. J.; Boyd, A. K.; Denevi, B. W.; Robinson, M. S.; Martin, Anne; Wagner, R. V.; Povilaitis, R. Z.

doi:10.1130/abs/2019am-340869

Cited by 4 publications

(7 citation statements)

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“…New dated impact craters 10–20 m diameter on the Moon have a cumulative slope of 4.6 and differential slope of 5.1 (Speyerer et al., 2016), much steeper than our Mars data. This steep lunar distribution has persisted even with many new crater detections and up to 100 m diameter (Speyerer et al., 2020). There are several possible explanations for this difference in slope between Mars and the Moon: Biases in the Martian data Biases in the lunar data Different impacting bolide populations Different target material properties Atmospheric effects …”

Section: Discussionmentioning

confidence: 99%

New Craters on Mars: An Updated Catalog

Daubar¹,

Gao²,

Wexler³

et al. 2022

JGR Planets

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Newly formed craters on Mars were first discovered by Malin et al. (2006), using an imaging campaign with the Mars Global Surveyor Mars Orbiter Camera (MOC) to find 20 new impacts by manually comparing the repeat images of the same areas. These techniques have been continued with the Context Camera (CTX) on the Mars Reconnaissance Orbiter for the last ∼15 years (Daubar et al., 2013 and this work). These new craters have provided valuable new information about Mars, revealing shallow subsurface ice (

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Section: Discussionmentioning

confidence: 99%

New Craters on Mars: An Updated Catalog

Daubar¹,

Gao²,

Wexler³

et al. 2022

JGR Planets

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“…(b) 88°S–90°S of lunar south pole. The background image is LROC WAC South Pole Summer mosaic (Speyerer et al., 2020). Red dashed boundaries show the areas used to study the diurnal variation of the hydration.…”

Section: Resultsmentioning

confidence: 99%

Lunar South Polar Water Cycle and Water Resources: Diurnal and Spatial Variations in Surficial Hydration From Repeated Moon Mineralogy Mapper Observations

Lu,

Wang,

Jiao

et al. 2024

Geophysical Research Letters

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The diurnal variation and distribution of lunar surficial hydration (OH/H2O) is of great significance for understanding the solar wind implantation and water cycle on the Moon. Lunar south pole is an ideal place to study the diurnal variation of surficial hydration due to the large number of repeat observations of the same region, which is very limited in mid‐ or low‐latitudes. Here we showed clear 0.5‐hr interval diurnal variation of surficial hydration at lunar south pole. The variation of hydration band depth with local time is exactly the opposite to the variation of temperature, indicating that lunar surficial hydration changes sufficiently with temperature. This relationship indicates that both the diurnal variation and hydration content are latitude dependent. Our observations support the hypothesis that the diurnal variation of hydration on the Moon is due to the formation of metastable hydroxyl.

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“…(2) Lunar Reconnaissance Orbiter Camera (LROC) Wide Angle Camera (WAC) mosaic images, Wide Angle Camera Normalized Reflectance images (643 nm) without shadows (WACNS) mosaic images (Speyerer et al 2012), LROC Narrow Angle Camera (NAC) images (Klem et al 2014;Mattson et al 2012), Global WAC digital terrain model (GLD 100) (Scholten et al 2011), Chandrayaan-1 Moon Mineralogy Mapper (M 3 ) (Pieters et al 2009) data, and the optical maturity (OMAT) parameter generated by the MI data (Lucey et al 2000;Lemelin et al 2016) were used to identify fresh exposed mare basalt; (3) Lunar Prospector (LP) gamma-ray spectrometer (GRS) data (Prettyman 2012;Prettyman et al 2006) combined with the abundance of oxides and M 3 data were used to investigate the chemical components and mineral composition of the fresh exposed mare basalt; and (4) LROC WAC mosaic images, WACNS mosaic images, LROC NAC images, and GLD 100 were employed to reveal geometrical topographical features and combined with the ejecta thickness method to deduce the formation process.…”

Section: Methodsmentioning

confidence: 99%

New view of the Balmer-Kapteyn region: Cryptomare distribution and formation

Qiu

Yan

et al. 2022

A&A

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Context. The cryptomare in the Balmer-Kapteyn region is the oldest one on the Moon. Determining the extent and formation of this feature can deepen our understanding of early mare volcanism and help establish temporal and spatial constraints on lunar thermal and volcanic history. Aims. This paper focuses on the identification of lunar cryptomaria and figuring out their formation processes. Methods. We used the Global WAC digital terrain model to analyze the terrain. We built a mathematical model using support vector machines and input Kaguya Multiband Imager data to estimate oxide concentrations in the Balmer-Kapteyn region. We used the Chandrayaan-1 Moon Mineralogy Mapper (M3) to analyze the minerals. We improved the cryptomare identification model to increase the accuracy of basalt identification in the cryptomare region. Finally, we used three methods to estimate the ejecta thickness of the target basin to the Balmer-Kapteyn region. Results. New Al2O3, CaO, FeO, MgO, and TiO2 maps were generated using the Kaguya Multiband Imager and a novel machine-learning model. As a result, the extent of the cryptomare in the Balmer-Kapteyn region was redefined and the formation process of the cryptomare in the Balmer-Kapteyn region was divided into five formation stages: Balmer basin formation, ejecta coverage from the Pre-Nectarian and Nectarian large impact basins, mare basalt filling, ejecta secondary coverage of high-albedo materials, and exposure of mare basalts. Conclusions. We found that the bottom of the Crater Vendelinus is likely to hide ancient mare basalt. Moreover, the high-aluminum mare basalt of the cryptomare is different from the composition of the exposed mare basalts in Mare Fecunditatis and Crater Vendelinus. The high-albedo material covering the cryptomare in the Balmer-Kapteyn region could have come from the Langrenus, Petavius, Humboldt, La Perouse, and Ansgarius Craters, along with some from the Orientale Basin impact event or potentially from the Imbrium Basin impact event.

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Photometric and Color Properties of Contemporary Lunar Impacts

Cited by 4 publications

References 0 publications

New Craters on Mars: An Updated Catalog

New Craters on Mars: An Updated Catalog

Lunar South Polar Water Cycle and Water Resources: Diurnal and Spatial Variations in Surficial Hydration From Repeated Moon Mineralogy Mapper Observations

New view of the Balmer-Kapteyn region: Cryptomare distribution and formation

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