Composition of organics on asteroid (101955) Bennu

H. H. Kaplan; A. A. Simon; V. E. Hamilton; M. S. Thompson; S. A. Sandford; M. A. Barucci; E. A. Cloutis; J. Brucato; D. C. Reuter; D. P. Glavin; B. E. Clark; J. P. Dworkin; H. Campins; J. P. Emery; S. Fornasier; X. D. Zou; D. S. Lauretta

doi:10.1051/0004-6361/202141167

Composition of organics on asteroid (101955) Bennu

H. H. Kaplan, A. A. Simon, V. E. Hamilton, M. S. Thompson, S. A. Sandford, M. A. Barucci, E. A. Cloutis, J. Brucato, D. C. Reuter, D. P. Glavin, B. E. Clark, J. P. Dworkin, H. Campins, J. P. Emery, S. Fornasier, X. D. Zou, D. S. Lauretta

Astronomy and Planetary Sciences

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

15 Scopus citations

Abstract

Context. The Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) mission detected an infrared absorption at 3.4 μm on near-Earth asteroid (101955) Bennu. This absorption is indicative of carbon species, including organics, on the surface. Aims. We aim to describe the composition of the organic matter on Bennu by investigating the spectral features in detail. Methods. We use a curated set of spectra acquired by the OSIRIS-REx Visible and InfraRed Spectrometer that have features near 3.4 μm (3.2 to 3.6 μm) attributed to organics. We assess the shapes and strengths of these absorptions in the context of laboratory spectra of extraterrestrial organics and analogs. Results. We find spectral evidence of aromatic and aliphatic CH bonds. The absorptions are broadly consistent in shape and depth with those associated with insoluble organic matter in meteorites. Given the thermal and space weathering environments on Bennu, it is likely that the organics have not been exposed for long enough to substantially decrease the H/C and destroy all aliphatic molecules.

Original language	English (US)
Article number	e2141167
Journal	Astronomy and Astrophysics
Volume	653
DOIs	https://doi.org/10.1051/0004-6361/202141167
State	Published - Sep 1 2021

Keywords

Minor planets, asteroids: individual: (101955) Bennu
Planets and satellites: composition
Techniques: spectroscopic

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1051/0004-6361/202141167

Cite this

Kaplan, H. H., Simon, A. A., Hamilton, V. E., Thompson, M. S., Sandford, S. A., Barucci, M. A., Cloutis, E. A., Brucato, J., Reuter, D. C., Glavin, D. P., Clark, B. E., Dworkin, J. P., Campins, H., Emery, J. P., Fornasier, S., Zou, X. D., & Lauretta, D. S. (2021). Composition of organics on asteroid (101955) Bennu. Astronomy and Astrophysics, 653, Article e2141167. https://doi.org/10.1051/0004-6361/202141167

@article{4e91e1626f1a43cab9b6cf0ffb77978f,

title = "Composition of organics on asteroid (101955) Bennu",

abstract = "Context. The Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) mission detected an infrared absorption at 3.4 μm on near-Earth asteroid (101955) Bennu. This absorption is indicative of carbon species, including organics, on the surface. Aims. We aim to describe the composition of the organic matter on Bennu by investigating the spectral features in detail. Methods. We use a curated set of spectra acquired by the OSIRIS-REx Visible and InfraRed Spectrometer that have features near 3.4 μm (3.2 to 3.6 μm) attributed to organics. We assess the shapes and strengths of these absorptions in the context of laboratory spectra of extraterrestrial organics and analogs. Results. We find spectral evidence of aromatic and aliphatic CH bonds. The absorptions are broadly consistent in shape and depth with those associated with insoluble organic matter in meteorites. Given the thermal and space weathering environments on Bennu, it is likely that the organics have not been exposed for long enough to substantially decrease the H/C and destroy all aliphatic molecules.",

keywords = "Minor planets, asteroids: individual: (101955) Bennu, Planets and satellites: composition, Techniques: spectroscopic",

author = "Kaplan, {H. H.} and Simon, {A. A.} and Hamilton, {V. E.} and Thompson, {M. S.} and Sandford, {S. A.} and Barucci, {M. A.} and Cloutis, {E. A.} and J. Brucato and Reuter, {D. C.} and Glavin, {D. P.} and Clark, {B. E.} and Dworkin, {J. P.} and H. Campins and Emery, {J. P.} and S. Fornasier and Zou, {X. D.} and Lauretta, {D. S.}",

note = "Publisher Copyright: {\textcopyright} H. H. Kaplan et al. 2021.",

year = "2021",

month = sep,

day = "1",

doi = "10.1051/0004-6361/202141167",

language = "English (US)",

volume = "653",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

TY - JOUR

T1 - Composition of organics on asteroid (101955) Bennu

AU - Kaplan, H. H.

AU - Simon, A. A.

AU - Hamilton, V. E.

AU - Thompson, M. S.

AU - Sandford, S. A.

AU - Barucci, M. A.

AU - Cloutis, E. A.

AU - Brucato, J.

AU - Reuter, D. C.

AU - Glavin, D. P.

AU - Clark, B. E.

AU - Dworkin, J. P.

AU - Campins, H.

AU - Emery, J. P.

AU - Fornasier, S.

AU - Zou, X. D.

AU - Lauretta, D. S.

PY - 2021/9/1

Y1 - 2021/9/1

N2 - Context. The Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) mission detected an infrared absorption at 3.4 μm on near-Earth asteroid (101955) Bennu. This absorption is indicative of carbon species, including organics, on the surface. Aims. We aim to describe the composition of the organic matter on Bennu by investigating the spectral features in detail. Methods. We use a curated set of spectra acquired by the OSIRIS-REx Visible and InfraRed Spectrometer that have features near 3.4 μm (3.2 to 3.6 μm) attributed to organics. We assess the shapes and strengths of these absorptions in the context of laboratory spectra of extraterrestrial organics and analogs. Results. We find spectral evidence of aromatic and aliphatic CH bonds. The absorptions are broadly consistent in shape and depth with those associated with insoluble organic matter in meteorites. Given the thermal and space weathering environments on Bennu, it is likely that the organics have not been exposed for long enough to substantially decrease the H/C and destroy all aliphatic molecules.

AB - Context. The Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) mission detected an infrared absorption at 3.4 μm on near-Earth asteroid (101955) Bennu. This absorption is indicative of carbon species, including organics, on the surface. Aims. We aim to describe the composition of the organic matter on Bennu by investigating the spectral features in detail. Methods. We use a curated set of spectra acquired by the OSIRIS-REx Visible and InfraRed Spectrometer that have features near 3.4 μm (3.2 to 3.6 μm) attributed to organics. We assess the shapes and strengths of these absorptions in the context of laboratory spectra of extraterrestrial organics and analogs. Results. We find spectral evidence of aromatic and aliphatic CH bonds. The absorptions are broadly consistent in shape and depth with those associated with insoluble organic matter in meteorites. Given the thermal and space weathering environments on Bennu, it is likely that the organics have not been exposed for long enough to substantially decrease the H/C and destroy all aliphatic molecules.

KW - Minor planets, asteroids: individual: (101955) Bennu

KW - Planets and satellites: composition

KW - Techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=85103635022&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85103635022&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202141167

DO - 10.1051/0004-6361/202141167

M3 - Article

AN - SCOPUS:85103635022

SN - 0004-6361

VL - 653

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - e2141167

ER -

Composition of organics on asteroid (101955) Bennu

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this