The global surface roughness of 25143 Itokawa

Hannah C.M. Susorney; Catherine L. Johnson; Olivier S. Barnouin; Michael G. Daly; Jeffrey A. Seabrook; Edward B. Bierhaus; Dante S. Lauretta

doi:10.1016/j.icarus.2019.01.021

The global surface roughness of 25143 Itokawa

Hannah C.M. Susorney, Catherine L. Johnson, Olivier S. Barnouin, Michael G. Daly, Jeffrey A. Seabrook, Edward B. Bierhaus, Dante S. Lauretta

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

Surface roughness is an important metric in understanding how the geologic history of an asteroid affects its small-scale topography and it provides an additional means to quantitatively compare one asteroid with another. In this study, we report the first detailed global surface roughness maps of 25143 Itokawa at horizontal scales from 8–32 m. Comparison of the spatial distribution of the surface roughness of Itokawa with 433 Eros, the other asteroid for which this kind of analysis has been possible, indicates that the two asteroids are dominated by different geologic processes. On Itokawa, the surface roughness reflects the results of down-slope activity that moves fine grained material into geopotential lows and leaves large blocks in geopotential highs. On 433 Eros, the surface roughness is controlled by geologically-recent large impact craters. In addition, large longitudinal spatial variations of surface roughness could impact the role of YORP on Itokawa.

Original language	English (US)
Pages (from-to)	141-152
Number of pages	12
Journal	Icarus
Volume	325
DOIs	https://doi.org/10.1016/j.icarus.2019.01.021
State	Published - Jun 2019

Keywords

25143 Itokawa
433 Eros
Asteroids
Surface roughness
Topography

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1016/j.icarus.2019.01.021

Cite this

@article{ecfaccdfd3f74e27b80fe7a31251a3f7,

title = "The global surface roughness of 25143 Itokawa",

abstract = "Surface roughness is an important metric in understanding how the geologic history of an asteroid affects its small-scale topography and it provides an additional means to quantitatively compare one asteroid with another. In this study, we report the first detailed global surface roughness maps of 25143 Itokawa at horizontal scales from 8–32 m. Comparison of the spatial distribution of the surface roughness of Itokawa with 433 Eros, the other asteroid for which this kind of analysis has been possible, indicates that the two asteroids are dominated by different geologic processes. On Itokawa, the surface roughness reflects the results of down-slope activity that moves fine grained material into geopotential lows and leaves large blocks in geopotential highs. On 433 Eros, the surface roughness is controlled by geologically-recent large impact craters. In addition, large longitudinal spatial variations of surface roughness could impact the role of YORP on Itokawa.",

keywords = "25143 Itokawa, 433 Eros, Asteroids, Surface roughness, Topography",

author = "Susorney, {Hannah C.M.} and Johnson, {Catherine L.} and Barnouin, {Olivier S.} and Daly, {Michael G.} and Seabrook, {Jeffrey A.} and Bierhaus, {Edward B.} and Lauretta, {Dante S.}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Inc.",

year = "2019",

month = jun,

doi = "10.1016/j.icarus.2019.01.021",

language = "English (US)",

volume = "325",

pages = "141--152",

journal = "Icarus",

issn = "0019-1035",

publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - The global surface roughness of 25143 Itokawa

AU - Susorney, Hannah C.M.

AU - Johnson, Catherine L.

AU - Barnouin, Olivier S.

AU - Daly, Michael G.

AU - Seabrook, Jeffrey A.

AU - Bierhaus, Edward B.

AU - Lauretta, Dante S.

PY - 2019/6

Y1 - 2019/6

N2 - Surface roughness is an important metric in understanding how the geologic history of an asteroid affects its small-scale topography and it provides an additional means to quantitatively compare one asteroid with another. In this study, we report the first detailed global surface roughness maps of 25143 Itokawa at horizontal scales from 8–32 m. Comparison of the spatial distribution of the surface roughness of Itokawa with 433 Eros, the other asteroid for which this kind of analysis has been possible, indicates that the two asteroids are dominated by different geologic processes. On Itokawa, the surface roughness reflects the results of down-slope activity that moves fine grained material into geopotential lows and leaves large blocks in geopotential highs. On 433 Eros, the surface roughness is controlled by geologically-recent large impact craters. In addition, large longitudinal spatial variations of surface roughness could impact the role of YORP on Itokawa.

AB - Surface roughness is an important metric in understanding how the geologic history of an asteroid affects its small-scale topography and it provides an additional means to quantitatively compare one asteroid with another. In this study, we report the first detailed global surface roughness maps of 25143 Itokawa at horizontal scales from 8–32 m. Comparison of the spatial distribution of the surface roughness of Itokawa with 433 Eros, the other asteroid for which this kind of analysis has been possible, indicates that the two asteroids are dominated by different geologic processes. On Itokawa, the surface roughness reflects the results of down-slope activity that moves fine grained material into geopotential lows and leaves large blocks in geopotential highs. On 433 Eros, the surface roughness is controlled by geologically-recent large impact craters. In addition, large longitudinal spatial variations of surface roughness could impact the role of YORP on Itokawa.

KW - 25143 Itokawa

KW - 433 Eros

KW - Asteroids

KW - Surface roughness

KW - Topography

UR - http://www.scopus.com/inward/record.url?scp=85062210751&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85062210751&partnerID=8YFLogxK

U2 - 10.1016/j.icarus.2019.01.021

DO - 10.1016/j.icarus.2019.01.021

M3 - Article

AN - SCOPUS:85062210751

SN - 0019-1035

VL - 325

SP - 141

EP - 152

JO - Icarus

JF - Icarus

ER -

The global surface roughness of 25143 Itokawa

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this