Small-scale topography of 433 Eros from laser altimetry and imaging

Andrew F. Cheng, O. Barnouin-Jha, L. Prockter, M. T. Zuber, G. Neumann, D. E. Smith, J. Garvin, Mark Robinson, J. Veverka, P. Thomas

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

The NEAR laser rangefinder (NLR) obtained more than 16 million range returns from asteroid 433 Eros. We present the first results from analyses of topographic profiles interpreted with the aid of simultaneous, boresighted images obtained by the NEAR multispectral imager (MSI). The location of the NLR boresight relative to that of MSI is determined by detailed correlations of ranging data and simultaneous images, including cases where the laser boresight slewed off and on the limb of the asteroid and cases where the laser illuminated a boulder close to the time of an image. In the data presented, the precision of the range measurements is about 1 m, with the minimum spot diameter under 5 m, and successive spots are contiguous or overlapping. Elevation on the irregular object Eros is given with respect to the gravitational and centrifugal potential. Landslides in craters are characterized. Possible crater benches are identified. Examples of infilled craters are presented. These observations suggest a depth of unconsolidated regolith, which is subject to sliding, of typically a few tens of meters. An example of structurally controlled cratering is presented. Examples of tectonic features are described. Surface roughness on Eros is approximately self-affine from scales of a few meters to hundreds of meters. A comparison of fractal statistics shows that Eros is extremely rough on observed scales, when compared to terrestrial a'a lava on submeter scales and undisturbed lunar regolith on subcentimeter scales.

Original languageEnglish (US)
Pages (from-to)51-74
Number of pages24
JournalIcarus
Volume155
Issue number1
DOIs
StatePublished - 2002
Externally publishedYes

Fingerprint

altimetry
topography
laser
craters
boresights
crater
regolith
asteroids
asteroid
lasers
cratering
landslides
tectonic feature
rangefinding
lava
boulder
limbs
surface roughness
gravitational fields
seats

Keywords

  • Asteroid surfaces
  • Asteroids
  • Eros
  • Regoliths
  • Tectonics

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Cheng, A. F., Barnouin-Jha, O., Prockter, L., Zuber, M. T., Neumann, G., Smith, D. E., ... Thomas, P. (2002). Small-scale topography of 433 Eros from laser altimetry and imaging. Icarus, 155(1), 51-74. https://doi.org/10.1006/icar.2001.6750

Small-scale topography of 433 Eros from laser altimetry and imaging. / Cheng, Andrew F.; Barnouin-Jha, O.; Prockter, L.; Zuber, M. T.; Neumann, G.; Smith, D. E.; Garvin, J.; Robinson, Mark; Veverka, J.; Thomas, P.

In: Icarus, Vol. 155, No. 1, 2002, p. 51-74.

Research output: Contribution to journalArticle

Cheng, AF, Barnouin-Jha, O, Prockter, L, Zuber, MT, Neumann, G, Smith, DE, Garvin, J, Robinson, M, Veverka, J & Thomas, P 2002, 'Small-scale topography of 433 Eros from laser altimetry and imaging', Icarus, vol. 155, no. 1, pp. 51-74. https://doi.org/10.1006/icar.2001.6750
Cheng AF, Barnouin-Jha O, Prockter L, Zuber MT, Neumann G, Smith DE et al. Small-scale topography of 433 Eros from laser altimetry and imaging. Icarus. 2002;155(1):51-74. https://doi.org/10.1006/icar.2001.6750
Cheng, Andrew F. ; Barnouin-Jha, O. ; Prockter, L. ; Zuber, M. T. ; Neumann, G. ; Smith, D. E. ; Garvin, J. ; Robinson, Mark ; Veverka, J. ; Thomas, P. / Small-scale topography of 433 Eros from laser altimetry and imaging. In: Icarus. 2002 ; Vol. 155, No. 1. pp. 51-74.
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