Exploreneos. I. description and first results from the Warm Spitzer Near-Earth Object survey

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

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

We have begun the ExploreNEOs project in which we observe some 700 Near-Earth Objects (NEOs) at 3.6 and 4.5 μm with the Spitzer Space Telescope in its Warm Spitzer mode. From these measurements and catalog optical photometry we derive albedos and diameters of the observed targets. The overall goal of our ExploreNEOs program is to study the history of near-Earth space by deriving the physical properties of a large number of NEOs. In this paper, we describe both the scientific and technical construction of our ExploreNEOs program. We present our observational, photometric, and thermal modeling techniques. We present results from the first 101 targets observed in this program. We find that the distribution of albedos in this first sample is quite broad, probably indicating a wide range of compositions within the NEO population. Many objects smaller than 1 km have high albedos (>∼ 0.35), but few objects larger than 1 km have high albedos. This result is consistent with the idea that these larger objects are collisionally older, and therefore possess surfaces that are more space weathered and therefore darker, or are not subject to other surface rejuvenating events as frequently as smaller NEOs.

Original languageEnglish (US)
Pages (from-to)770-784
Number of pages15
JournalAstronomical Journal
Volume140
Issue number3
DOIs
StatePublished - Sep 2010

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near Earth objects
albedo
Space Infrared Telescope Facility
catalogs
photometry
physical properties
histories
physical property
history
modeling
programme

Keywords

  • Infrared: Planetary systems
  • Minor planets, asteroids: General
  • Surveys Online-only material: Color figure

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Trilling, D. E., Mueller, M., Hora, J. L., Harris, A. W., Bhattacharya, B., Bottke, W. F., ... Thomas, C. A. (2010). Exploreneos. I. description and first results from the Warm Spitzer Near-Earth Object survey. Astronomical Journal, 140(3), 770-784. https://doi.org/10.1088/0004-6256/140/3/770

Exploreneos. I. description and first results from the Warm Spitzer Near-Earth Object survey. / Trilling, David E; Mueller, M.; Hora, J. L.; Harris, A. W.; Bhattacharya, B.; Bottke, W. F.; Chesley, S.; Delbo, M.; Emery, J. P.; Fazio, G.; Mainzer, A.; Penprase, B.; Smith, H. A.; Spahr, T. B.; Stansberry, J. A.; Thomas, C. A.

In: Astronomical Journal, Vol. 140, No. 3, 09.2010, p. 770-784.

Research output: Contribution to journalArticle

Trilling, DE, Mueller, M, Hora, JL, Harris, AW, Bhattacharya, B, Bottke, WF, Chesley, S, Delbo, M, Emery, JP, Fazio, G, Mainzer, A, Penprase, B, Smith, HA, Spahr, TB, Stansberry, JA & Thomas, CA 2010, 'Exploreneos. I. description and first results from the Warm Spitzer Near-Earth Object survey', Astronomical Journal, vol. 140, no. 3, pp. 770-784. https://doi.org/10.1088/0004-6256/140/3/770
Trilling, David E ; Mueller, M. ; Hora, J. L. ; Harris, A. W. ; Bhattacharya, B. ; Bottke, W. F. ; Chesley, S. ; Delbo, M. ; Emery, J. P. ; Fazio, G. ; Mainzer, A. ; Penprase, B. ; Smith, H. A. ; Spahr, T. B. ; Stansberry, J. A. ; Thomas, C. A. / Exploreneos. I. description and first results from the Warm Spitzer Near-Earth Object survey. In: Astronomical Journal. 2010 ; Vol. 140, No. 3. pp. 770-784.
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