ExploreNEOs. V. Average albedo by taxonomic complex in the near-earth asteroid population

C. A. Thomas, David E Trilling, J. P. Emery, M. Mueller, J. L. Hora, L. A M Benner, B. Bhattacharya, W. F. Bottke, S. Chesley, M. Delbó, G. Fazio, A. W. Harris, A. Mainzer, M. Mommert, A. Morbidelli, B. Penprase, H. A. Smith, T. B. Spahr, J. A. Stansberry

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Examining the albedo distribution of the near-Earth object (NEO) population allows for a better understanding of the relationship between absolute (H) magnitude and size, which impacts calculations of the size frequency distribution and impact hazards. Examining NEO albedos also sheds light on the differences between the NEO and Main Belt populations. We combine albedo results from the ExploreNEOs Warm Spitzer Exploration Science program with taxonomic classifications from the literature, publicly available data sets, and new observations from our concurrent spectral survey to derive the average albedos for C-, D-, Q-, S-, V-, and X-complex NEOs. Using a sample size of 118 NEOs, we calculate average albedos of 0.29+0.05 -0.04, 0.26 +0.04 -0.03, and 0.42+0.13 -0.11 for the Q-, S-, and V-complexes, respectively. The averages for the C- and D-complexes are 0.13+0.06 -0.05 and 0.02+0.02 -0.01, but these averages are based on a small number of objects (five and two, respectively) and will improve with additional observations. We use albedos to assign X-complex asteroids to one of the E-, M-, or P-types. Our results demonstrate that the average albedos for the C-, S-, V-, and X-complexes are higher for NEOs than the corresponding averages observed in the Main Belt.

Original languageEnglish (US)
Article number85
JournalAstronomical Journal
Volume142
Issue number3
DOIs
StatePublished - Sep 2011

Fingerprint

near Earth objects
asteroids
albedo
asteroid
frequency distribution
hazards
hazard

Keywords

  • minor planets, asteroids: general
  • surveys

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Thomas, C. A., Trilling, D. E., Emery, J. P., Mueller, M., Hora, J. L., Benner, L. A. M., ... Stansberry, J. A. (2011). ExploreNEOs. V. Average albedo by taxonomic complex in the near-earth asteroid population. Astronomical Journal, 142(3), [85]. https://doi.org/10.1088/0004-6256/142/3/85

ExploreNEOs. V. Average albedo by taxonomic complex in the near-earth asteroid population. / Thomas, C. A.; Trilling, David E; Emery, J. P.; Mueller, M.; Hora, J. L.; Benner, L. A M; Bhattacharya, B.; Bottke, W. F.; Chesley, S.; Delbó, M.; Fazio, G.; Harris, A. W.; Mainzer, A.; Mommert, M.; Morbidelli, A.; Penprase, B.; Smith, H. A.; Spahr, T. B.; Stansberry, J. A.

In: Astronomical Journal, Vol. 142, No. 3, 85, 09.2011.

Research output: Contribution to journalArticle

Thomas, CA, Trilling, DE, Emery, JP, Mueller, M, Hora, JL, Benner, LAM, Bhattacharya, B, Bottke, WF, Chesley, S, Delbó, M, Fazio, G, Harris, AW, Mainzer, A, Mommert, M, Morbidelli, A, Penprase, B, Smith, HA, Spahr, TB & Stansberry, JA 2011, 'ExploreNEOs. V. Average albedo by taxonomic complex in the near-earth asteroid population', Astronomical Journal, vol. 142, no. 3, 85. https://doi.org/10.1088/0004-6256/142/3/85
Thomas, C. A. ; Trilling, David E ; Emery, J. P. ; Mueller, M. ; Hora, J. L. ; Benner, L. A M ; Bhattacharya, B. ; Bottke, W. F. ; Chesley, S. ; Delbó, M. ; Fazio, G. ; Harris, A. W. ; Mainzer, A. ; Mommert, M. ; Morbidelli, A. ; Penprase, B. ; Smith, H. A. ; Spahr, T. B. ; Stansberry, J. A. / ExploreNEOs. V. Average albedo by taxonomic complex in the near-earth asteroid population. In: Astronomical Journal. 2011 ; Vol. 142, No. 3.
@article{67c50e92f88f4d319bc76adb4b8c665d,
title = "ExploreNEOs. V. Average albedo by taxonomic complex in the near-earth asteroid population",
abstract = "Examining the albedo distribution of the near-Earth object (NEO) population allows for a better understanding of the relationship between absolute (H) magnitude and size, which impacts calculations of the size frequency distribution and impact hazards. Examining NEO albedos also sheds light on the differences between the NEO and Main Belt populations. We combine albedo results from the ExploreNEOs Warm Spitzer Exploration Science program with taxonomic classifications from the literature, publicly available data sets, and new observations from our concurrent spectral survey to derive the average albedos for C-, D-, Q-, S-, V-, and X-complex NEOs. Using a sample size of 118 NEOs, we calculate average albedos of 0.29+0.05 -0.04, 0.26 +0.04 -0.03, and 0.42+0.13 -0.11 for the Q-, S-, and V-complexes, respectively. The averages for the C- and D-complexes are 0.13+0.06 -0.05 and 0.02+0.02 -0.01, but these averages are based on a small number of objects (five and two, respectively) and will improve with additional observations. We use albedos to assign X-complex asteroids to one of the E-, M-, or P-types. Our results demonstrate that the average albedos for the C-, S-, V-, and X-complexes are higher for NEOs than the corresponding averages observed in the Main Belt.",
keywords = "minor planets, asteroids: general, surveys",
author = "Thomas, {C. A.} and Trilling, {David E} and Emery, {J. P.} and M. Mueller and Hora, {J. L.} and Benner, {L. A M} and B. Bhattacharya and Bottke, {W. F.} and S. Chesley and M. Delb{\'o} and G. Fazio and Harris, {A. W.} and A. Mainzer and M. Mommert and A. Morbidelli and B. Penprase and Smith, {H. A.} and Spahr, {T. B.} and Stansberry, {J. A.}",
year = "2011",
month = "9",
doi = "10.1088/0004-6256/142/3/85",
language = "English (US)",
volume = "142",
journal = "Astronomical Journal",
issn = "0004-6256",
publisher = "IOP Publishing Ltd.",
number = "3",

}

TY - JOUR

T1 - ExploreNEOs. V. Average albedo by taxonomic complex in the near-earth asteroid population

AU - Thomas, C. A.

AU - Trilling, David E

AU - Emery, J. P.

AU - Mueller, M.

AU - Hora, J. L.

AU - Benner, L. A M

AU - Bhattacharya, B.

AU - Bottke, W. F.

AU - Chesley, S.

AU - Delbó, M.

AU - Fazio, G.

AU - Harris, A. W.

AU - Mainzer, A.

AU - Mommert, M.

AU - Morbidelli, A.

AU - Penprase, B.

AU - Smith, H. A.

AU - Spahr, T. B.

AU - Stansberry, J. A.

PY - 2011/9

Y1 - 2011/9

N2 - Examining the albedo distribution of the near-Earth object (NEO) population allows for a better understanding of the relationship between absolute (H) magnitude and size, which impacts calculations of the size frequency distribution and impact hazards. Examining NEO albedos also sheds light on the differences between the NEO and Main Belt populations. We combine albedo results from the ExploreNEOs Warm Spitzer Exploration Science program with taxonomic classifications from the literature, publicly available data sets, and new observations from our concurrent spectral survey to derive the average albedos for C-, D-, Q-, S-, V-, and X-complex NEOs. Using a sample size of 118 NEOs, we calculate average albedos of 0.29+0.05 -0.04, 0.26 +0.04 -0.03, and 0.42+0.13 -0.11 for the Q-, S-, and V-complexes, respectively. The averages for the C- and D-complexes are 0.13+0.06 -0.05 and 0.02+0.02 -0.01, but these averages are based on a small number of objects (five and two, respectively) and will improve with additional observations. We use albedos to assign X-complex asteroids to one of the E-, M-, or P-types. Our results demonstrate that the average albedos for the C-, S-, V-, and X-complexes are higher for NEOs than the corresponding averages observed in the Main Belt.

AB - Examining the albedo distribution of the near-Earth object (NEO) population allows for a better understanding of the relationship between absolute (H) magnitude and size, which impacts calculations of the size frequency distribution and impact hazards. Examining NEO albedos also sheds light on the differences between the NEO and Main Belt populations. We combine albedo results from the ExploreNEOs Warm Spitzer Exploration Science program with taxonomic classifications from the literature, publicly available data sets, and new observations from our concurrent spectral survey to derive the average albedos for C-, D-, Q-, S-, V-, and X-complex NEOs. Using a sample size of 118 NEOs, we calculate average albedos of 0.29+0.05 -0.04, 0.26 +0.04 -0.03, and 0.42+0.13 -0.11 for the Q-, S-, and V-complexes, respectively. The averages for the C- and D-complexes are 0.13+0.06 -0.05 and 0.02+0.02 -0.01, but these averages are based on a small number of objects (five and two, respectively) and will improve with additional observations. We use albedos to assign X-complex asteroids to one of the E-, M-, or P-types. Our results demonstrate that the average albedos for the C-, S-, V-, and X-complexes are higher for NEOs than the corresponding averages observed in the Main Belt.

KW - minor planets, asteroids: general

KW - surveys

UR - http://www.scopus.com/inward/record.url?scp=80052694232&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052694232&partnerID=8YFLogxK

U2 - 10.1088/0004-6256/142/3/85

DO - 10.1088/0004-6256/142/3/85

M3 - Article

VL - 142

JO - Astronomical Journal

JF - Astronomical Journal

SN - 0004-6256

IS - 3

M1 - 85

ER -