Diameters And Albedos Of Three Subkilometer Near Earth Objects Derived From Spitzer Observations

Trilling, D. E., Mueller, M., Hora, J. L., Fazio, G., Spahr, T., Stansberry, J. A., Smith, H. A., Chesley, S. R. & Mainzer, A. K., 1-Sep-2008, In : Bulletin of the American Astronomical Society. 40, p. 433

Research output: Contribution to journalMeeting AbstractAcademic

  • David E. Trilling
  • M. Mueller
  • J. L. Hora
  • G. Fazio
  • T. Spahr
  • J. A. Stansberry
  • H. A. Smith
  • S. R. Chesley
  • A. K. Mainzer
Near Earth Objects (NEOs) are fragments of remnant primitive bodies that date from the era of Solar System formation. At present, the physical properties and origins of NEOs are poorly understood. We have measured (Trilling et al. 2008) thermal emission from three NEOs --- (6037) 1988 EG, 1993 GD, and 2005 GL --- with Spitzer's IRAC instrument at 3.6, 4.5, 5.8, and 8.0 microns (the last object was detected only at 5.8 and 8.0 microns). The diameters of these three objects are 400 m, 180 m, and 160 m, respectively, with uncertainties of around 20% (including both observational and systematic errors). For all three the geometric albedos are around 0.30, in agreement with previous results that most NEOs are S-class asteroids. For the two objects detected at 3.6 and 4.5 microns, diameters and albedos based only on those data agree with the values based on modeling the data in all four bands. This agreement, and the high sensitivity of IRAC, show the promise of the Spitzer Warm Mission for determining the physical parameters for a large number of NEOs. Support for this work was provided by NASA through an award issued by JPL/Caltech.
Original languageEnglish
Pages (from-to)433
JournalBulletin of the American Astronomical Society
Publication statusPublished - 1-Sep-2008
Event40th DPS meeting, Amerivan Astronomical Society, 2008 - Ithaca, NY, United States
Duration: 10-Oct-200815-Oct-2008


40th DPS meeting, Amerivan Astronomical Society, 2008


Ithaca, NY, United States

Event: Conference

ID: 20750301